1Description
868 MHz wireless transceiver (transmitter and
receiver) with RS-232 and RS-485 interface,
can be extended with I/O extension modules
SATEL-LP8
© SATEL
Data sheet
In addition to an RS-232 and RS-485 2-wire interface, the
SATEL-LP8 wireless module supports the option of directly
connecting up to 32I/O extension modules in the station
structure via the TBUS DIN rail connector.
Wireless communication is based on Trusted Wireless 2.0
technology.
Addressing of the wireless module and I/O mapping of the
I/O extension modules is carried out quickly and easily by
means of the thumbwheel on the front. Programming knowl-
edge is not required.
The SATEL-LP-CONF configuration and diagnostics soft-
ware for special functionality and diagnostic options in the
wireless module is available free of charge.
Features
Flexible network applications: I/O data, serial data,
PLC/Modbus RTU mode
Adjustable data rates for the wireless interface
Easy point-to-point or network structures (star, mesh)
Quick and easy startup thanks to simple wireless mod-
ule addressing using the thumbwheel on the front
Integrated RS-232 and RS-485 interface
Can be extended with up to 32 I/O modules per station
via TBUS (hot-swappable)
128-bit data encryption (AES)
Unique network addressing via plug-in configuration
memory for safe, parallel operation of several networks
with different network IDs
Data rates and ranges can be adjusted
Make sure you always use the latest documentation.
It can be downloaded from the product at www.satel.com
.
106917_en_00
2015-10-26
SATEL-LP8
106917_en_00 SATEL 2
2Table of contents
1 Description .............................................................................................................................. 1
2 Table of contents..................................................................................................................... 2
3 Ordering data .......................................................................................................................... 3
4 Technical data ......................................................................................................................... 3
5 Safety regulations and installation notes.................................................................................. 6
5.1 Intended use ...................................................................................................................... 6
5.2 Installation notes ................................................................................................................. 6
6 Installation ............................................................................................................................... 7
6.1 Structure ........................................................................................................................... 7
6.2 Basic circuit diagram ............................................................................................................ 7
6.3 Display and diagnostic elements ............................................................................................. 8
6.4 Assembly/removal ............................................................................................................. 11
6.5 Connecting the cables ........................................................................................................ 12
6.6 Serial pin assignment ......................................................................................................... 12
7 Startup and configuration ......................................................................................................14
7.1 Resetting to the default settings............................................................................................. 14
7.2 Setting the station address (RAD-ID) ...................................................................................... 14
7.3 Transmission capacity ........................................................................................................ 15
7.4 Data transmission speed of the wireless interface...................................................................... 15
7.5 I/O data transmission.......................................................................................................... 16
7.6 SATEL-LP-CONF configuration and diagnostics software............................................................ 16
7.7 Serial data transmission ...................................................................................................... 16
7.8 PLC/Modbus RTU mode ..................................................................................................... 16
7.9 Behavior of the input and output modules in the event of an interrupted wireless connection ................ 17
7.10 Saving the wireless network ................................................................................................. 17
7.11 Copying device settings to new network devices ....................................................................... 18
8 Process data.......................................................................................................................... 19
SATEL-LP8
106917_en_00 SATEL 3
Description Type Order No. Pcs./Pkt.
868 MHz wireless transceiver with RS-232, RS-485 2-wire interface,
expandable with I/O extension modules, with screw connection, antenna
connection:RSMA (female), including DIN rail connector, without antenna.
SATEL-LP8 YM0408 1
3Ordering data
Accessories Type Order No. Pcs./Pkt.
Analog/digital I/O extension module with 2 digital inputs/outputs
(0...250 V AC/DC) and 1 analog input (0/4...20 mA) and output
(0/4 ... 20 mA, 0...10 V), with screw connection, incl. DIN rail connector
SATEL-LP-DAIO6 YI0105 1
Digital I/O extension module with 4 digital inputs (0...250 V AC/DC),
with screw connection, incl. DIN rail connector
SATEL-LP-DI4 YI0101 1
Digital I/O extension module with 4 digital relay outputs
(6 A, 250 V AC/ 24 V DC), with screw connection, incl. DIN rail connector
SATEL-LP-DOR4 YI0102 1
Digital I/O extension module with 8 digital inputs (0 ... 30.5 V DC) or 2 pulse
inputs (0 ... 100 Hz), with screw connection, including DIN rail connector
SATEL-LP-DI8 YI0106 1
Digital I/O extension module with 8 digital transistor outputs
(30.5 VDC/200 mA), with screw connection, including DIN rail connector
SATEL-LP-DO8 YI0107 1
Analog extension module with 4 analog current inputs (0/4 mA ... 20 mA),
with screw connection, incl. DIN rail connector
SATEL-LP-AI4 YI0103 1
Analog I/O extension module with 4 analog current/voltage outputs
(0/4 mA ... 20 mA, 0...10 V), with screw connection, incl. DIN rail connector
SATEL-LP-AO4 YI0104 1
Temperature I/O extension module with 4 PT100 inputs (-50...+250°C),
with screw connection, including DIN rail connector
SATEL-LP-PT100 YI0108 1
USB data cable for communication between the PC and SATEL-LP
devices. Energy supply for diagnostics and configuration via the USB port
of the PC, cable length: 2 m
SATEL-LP-PROG YC0520 1
Configuration stick for easy and safe network addressing for the 868 MHz
wireless module, unique network ID, RF band 1
SATEL-LP8-CONF1 YO0001 1
Memory stick for saving individual configuration data for the wireless
module
SATEL-LP-MEMORY YO0010 1
Omnidirectional antenna, 868MHz, 4dBi, linear vertical, N (female), open-
ing angle h/v 360°/30°, IP67, salt water resistant, incl. mounting bracket
and mast clips for 30mm ... 45mm diameter, stainless steel
SATEL-LP-ANT8N YA0868 1
Antenna cable, 2 m in length; N (male) -> RSMA (male),
impedance 50 ohms
SATEL-LP-RF2 YC1520 1
4 Technical data
Dimensions
Dimensions W/H/D 17.5 mm / 99 mm / 114.5 mm
General data
Overvoltage category II
Degree of protection IP20
Pollution degree 2
Type of housing PA 6.6-FR, green
Flammability rating according to UL 94 V0
SATEL-LP8
106917_en_00 SATEL 4
Supply
Supply voltage range 19.2 V DC ... 30.5 V DC
Max. current consumption 65 mA (@ 24V DC, @25°C, stand-alone)
6 A (@24V DC, with fully utilized TBUS)
Transient surge protection Yes
System limits
Wireless module, Number of supported devices 99 (per wireless network)
Wireless module, Number of possible extension modules 32 (per wireless module)
Wireless network, Number of supported devices, I/O data mode 99 (I/O extension modules per wireless network, serial interfaces deactivated)
Wireless network, Number of supported devices, Serial data mode 0 (no I/O extension modules can be used)
Wireless network, Number of supported devices, PLC/Modbus RTU mode 99 (I/O extension modules per wireless network, access to extension modules
via Modbus RTU protocol)
Wireless interface
Antenna connection method RSMA (female)
Direction Bi-directional
Frequency 868 MHz
Frequency range 869.4 MHz ... 869.65 MHz
Number of channel groups 14
Channel distance 30 kHz (Depending on the network structure and the data transmission rate)
Data transmission rate (adjustable) 1.2 kbps
9.6 kbps
19.2 kbps
60 kbps
120 kbps
Receiver sensitivity -122 dBm (1.2 kbps)
-114 dBm (9.6 kbps)
-111 dBm (19.2 kbps)
-104 dBm (60 kbps)
-103 dBm (120 kbps)
Transmit capacity, maximum 27 dBm (Default setting, adjustable)
Security 128-bit data encryption
RS-232, 3-wire
Connection method Plug-in screw terminal block
Transmission speed 0,3 ... 115,2 kbit/s
Transmission length 15 m
RS-485, 2-wire
Connection method Plug-in screw terminal block
Transmission speed 0,3 ... 115,2 kbit/s
Transmission length 1200 m
Termination resistor (switchable via DIP switches) 390 / 150 / 390
RSSI output
Number of outputs 1
Voltage output signal 0 V ... 3 V
RF link relay output
Number of outputs 1
Contact type PDT
Contact material PdRu, gold-plated
SATEL-LP8
106917_en_00 SATEL 5
Maximum switching voltage 30 V AC
60 V DC
Max. switching current 500 mA
Electrical service life 5 x 10
5
cycles with 0.5 A @ 30 V DC
RF link relay output
Connection data
Connection method Screw connection
Conductor cross section, solid 0.2 mm² ... 2.5 mm²
Conductor cross section, flexible 0.2 mm² ... 2.5 mm²
Conductor cross section AWG/kcmil 24 ... 14
Stripping length 7 mm
Tightening torque 0.6 Nm
Status indication
Status display Green LED (supply voltage, PWR)
Green LED (bus communication, DAT)
Red LED (periphery error, ERR)
3 x green, 1 x yellow LED (LED bar graph receive quality, RSSI)
GreenLED (receive data, RX)
GreenLED (transmit data, TX)
Ambient conditions
Ambient temperature (operation) -40 °C ... 70 °C
-40 °F ... 158 °F
Ambient temperature (storage/transport) -40 °C ... 85 °C
-40 °F ... 185 °F
Permissible humidity (operation) 20 % ... 85 %
Permissible humidity (storage/transport) 20 % ... 85 %
Altitude 2000 m
Vibration (operation) in accordance with IEC 60068-2-6: 5g, 10 Hz ... 150 Hz
Shock 16g, 11 ms
Certification
Conformance CE compliance (R&TTE directive 1999/5/EC)
Conformance
R&TTE Directive 1999/5/EC
Effective use of the radio spectrum according to EN 300328
Noise immunity according to EN 61000-6-2
Noise emission according to EN 61000-6-4
Health according to EN 50385
Electrical safety according to EN 60950-1
SATEL-LP8
106917_en_00 SATEL 6
5 Safety regulations and installation
notes
5.1 Intended use
The devices are intended for application in industrial envi-
ronments.
The wireless system is ClassA equipment and may cause
radio interference in residential areas. In this case, the oper-
ator may be required to implement appropriate measures
and to pay the costs incurred as a result.
Please note that, in combination with antennas, the maxi-
mum permissible transmission power may be exceeded. In
this case, set the transmission power via the software.
5.2 Installation notes
Satel hereby declares that this wireless system com-
plies with the basic requirements and other relevant
regulations specified in Directive 1999/5/EC.
Installation, operation, and maintenance may only be
carried out by qualified electricians. Follow the installa-
tion instructions as described.
When installing and operating the device, the applica-
ble regulations and safety directives (including national
safety directives), as well as general technical regula-
tions, must be observed. The technical data is provided
in the package slip and on the certificates (conformity
assessment, additional approvals where applicable).
The device must not be opened or modified. Do not re-
pair the device yourself, replace it with an equivalent de-
vice. Repairs may only be carried out by the
manufacturer. The manufacturer is not liable for dam-
age resulting from violation.
The IP20 protection (IEC 60529/EN 60529) of the de-
vice is intended for use in a clean and dry environment.
The device must not be subject to mechanical strain
and/or thermal loads, which exceed the limits de-
scribed.
To protect the device against mechanical or electrical
damage, install it in a suitable housing with appropriate
degree of protection as per IEC60529.
The device complies with the EMC regulations for in-
dustrial areas (EMC classA). When using the device in
residential areas, it may cause radio interference.
Only specified devices from Satel may be connected to
the 12-pos. S-PORT interface.
Operation of the wireless system is only per-
mitted if accessories available from Satel are
used. The use of any other components can
lead to withdrawal of the operating license.
You can find the approved accessories for
this wireless system listed with the item at
www.satel.com
.
WARNING: Risk of electric shock
During operation, certain parts of this device
may carry hazardous voltages. Disregarding
this warning may result in damage to equip-
ment and/or serious personal injury.
Provide a switch/circuit breaker close to
the device, which is labeled as the dis-
connect device for this device or the en-
tire control cabinet.
Provide overcurrent protection (I≤6A) in
the installation.
Disconnect the device from all power
sources during maintenance work and
configuration (the device can remain con-
nected to SELV or PELV circuits).
The housing of the device provides a ba-
sic insulation against the neighboring de-
vices, for 300 V eff. If several devices are
installed next to each other, this has to be
taken into account, and additional insula-
tion has to be installed if necessary. If the
neighboring device is equipped with ba-
sic insulation, no additional insulation is
necessary.
SATEL-LP8
106917_en_00 SATEL 7
6 Installation
6.1 Structure
Figure 1 Function elements
6.2 Basic circuit diagram
Figure 2 Block diagram
NOTE: electrostatic discharge!
The device contains components that can be
damaged or destroyed by electrostatic dis-
charge. When handling the device, observe
the necessary safety precautions against
electrostatic discharge (ESD) according to
EN 61340-5-1 and IEC 61340-5-1.
+24V
RSSI+ RSSI-
ANT
COM
1
NO
1
NC
1
RX TX GND
D(A) D(B)
Reset
RAD-ID
S.PORT
8
8
P
W
R
DAT
E
R
R
R
X
T
X
0V
+24V
0V
RSSI+
RSSI-
2
1
3
4
5
7
6
9
11
12
17
16
13
15
14
10
8
Pos. Designation
1 RSMA antenna connection (socket)
2 Test output RSSI (0...3 V DC) for evaluation of the
wireless signal strength
3 Device supply (+24 V DC, GND)
4 12-pos. programming interface (S-PORT)
5 RAD ID address setting via thumbwheel
6SET button
7 Connection option for TBUS DIN rail connector
8DIN rail
9 Metal foot catch for DIN rail fixing
10 Connection terminal block RS-485 interface
11 Connection terminal block RS-232 interface
12 Relay output with PDT contact (floating)
13 RS-232/485 serial interface status LED (RX/TX)
14 LED bar graph for displaying the wireless signal
strength
15 ERR status LED, red (communication error)
16 DAT status LED, green (BUS communication)
17 PWR status LED, green (supply voltage)
RF
4.1
4.2
D(A)
D(B)
RS485
RAD-ID
S-Port
1.2
1.1
+24 V
0V
2.1
2.2
RSSI+
RSSI-
U
IFS
IFS
µC
6.1
6.2
6.3
NC
1
NO
1
COM
1
DC
DC
5.1
5.2
5.3
RX
TX
RS232
GND
SATEL-LP8
106917_en_00 SATEL 8
6.3 Display and diagnostic elements
The wireless module indicates the operating states with nine
LEDs.
Figure 3 Display and diagnostic elements
PWR LED
The green PWR LED indicates the supply voltage status.
OFF No supply voltage
ON Supply voltage OK
DAT LED
The green DAT LED indicates the bus communication sta-
tus.
OFF No communication
Flashing Configuration mode
ON Cyclic data communication
ERR LED
The red ERR LED indicates the error status.
OFF No error
Flashing Slow
(1.4Hz)
Wireless module in I/O data
mode (wire in/wire out):
double assignment of the I/O MAP
address, missing input module,
missing output module,
modified RAD ID
Wireless module in
PLC/Modbus RTU mode:
double assignment of the I/O MAP
address, modified RAD ID,
no Modbus communication
Fast
(2.8Hz)
Wireless connection interrupted
ON Local bus error
RAD-ID
SPORT
PWR
DAT
ERR
RX TX
0
1
set
D(A)
D(B)
RX
COM
1
TX
No
2
GND
NC
1
+24 V
RSSI
+
0V
ANT
RSSI
-
SATEL-LP8
106917_en_00 SATEL 9
LED bar graph
The LED bar graph indicates the receive signal strength.
LED bar graph - light sequence
The light sequence from bottom to top signalizes a firmware
update or that the wireless module is in write mode for the
memory stick.
LED bar graph - flashing
The devices are too close to each other.
As the full transmission power and the reception amplifier
are activated by default, signals may be superimposed.
Increase the distance between devices.
TX LED
The green TX LED indicates communication (transmit data)
with the RS-232/RS-485 interface.
RX LED
The green RX LED indicates communication (receive data)
with the RS-232/RS-485 interface.
SET button
The SET button is used to confirm a station change, without
performing a power up.
After making any change, press the SET button for one sec-
ond to apply the settings. The DAT LED starts flashing.
When the DAT LED is permanently on this means that read
in has been completed.
Station changes:
RAD ID address of the wireless module changed
I/O MAP address of extension modules changed
I/O extension module added
I/O extension module removed
Memory stick used
–SATEL-LP-CONF stick used
Bar
graph
LEDs Receive signal RSSI
(in V)
All 4 LEDs
light up
Connection with max-
imum receive signal
2.5 ... 3 V
1.2k -90dBm
9.6k -85dBm
19.2k -80dBm
60k -75dBm
120k -70dBm
Yellow and
2 green LEDs
light up
Connection with very
good receive signal
2 ... 2.5 V
1.2k -100dBm
9.6k -95 dBm
19.2k -90dBm
60k -85dBm
120k -80dBm
Yellow and
1 green LEDs
light up
Connection with good
receive signal
1.5 ... 2 V
1.2k -110dBm
9.6k -105dBm
19.2k -100dBm
60k -95 dBm
120k -90dBm
Yellow LED
lights up
Connection with low
receive signal
1 ... 1.5 V
1.2k LINK
9.6k LINK
19.2k LINK
60k LINK
120k LINK
OFF No connection 0V
Observe the maximum permissible emitted
transmission power of 27dBm.
This is determined based on:
Device transmission power + antenna gain
- cable attenuation.
Reduce the device transmission power, if
necessary.
The antenna is mounted outside the control
cabinet/building. Observe the installation in-
structions for the antenna used. See also
"Safety regulations and installation notes".
SATEL-LP8
106917_en_00 SATEL 10
RSSI LED bar graph
You can read the RSSI values (signal strength received) via
the serial interface of the master wireless module by
Modbus/RTU commands.
Figure 4 Example of point-to-point connection
In a point-to-point connection, the LED bar graph is active on
the master and on the repeater/slave. The same signal
strength is displayed on both modules.
Figure 5 Example of multipoint-to-point connection
In a wireless network with more than one repeater/slave,
only the yellow LED on the master is permanently on. The
signal strength is displayed on the repeaters/slaves. The
signal strength is always related to the wireless module
which is directly connected.
RF link relay
The RF link relay diagnoses the state of the wireless con-
nection. The relay picks up when the wireless connection is
established.
If the device is no longer receiving the data packets cor-
rectly, the relay is deactivated after a while. The relay picks
up again automatically when the wireless connection is re-
established. The relay has been designed as a changeover
contact.
RSSI test socket
A voltage measuring device can be connected to the RSSI
test socket to measure a voltage, which provides informa-
tion about the received wireless signal. Using the table
shown below the LED bar graph, the received signal
strength can be determined using the voltage value. This
can be useful when positioning and aligning the antenna, for
example.
Master
Repeater /
Slave
RAD-ID
Reset
+24V
0V
RSSI-
RSSI+
ANT
SPORT
0 1
Pwr
Dat
Err
RXTX
D(A) D(B)
GND
RX
CO
1
NC
1
CO
2
TX
RAD-ID
Reset
+24V
0V
RSSI-
RSSI+
ANT
SPORT
0 2
Pwr
Dat
Err
RXTX
D(A) D(B)
GND
RX
CO
1
NC
1
CO
2
TX
Master
Repeater /
Slave
Repeater /
Slave
RAD-ID
Reset
+24V
0V
RSSI-
RSSI+
ANT
SPORT
0 2
Pwr
Dat
Err
RXTX
D(A) D(B)
GND
RX
CO
1
NC
1
CO
2
TX
RAD-ID
Reset
+24V
0V
RSSI-
RSSI+
ANT
SPORT
0 1
Pwr
Dat
Err
RXTX
D(A) D(B)
GND
RX
CO
1
NC
1
CO
2
TX
RAD-ID
Reset
+24V
0V
RSSI-
RSSI+
ANT
SPORT
0 3
Pwr
Dat
Err
RXTX
D(A) D(B)
GND
RX
CO
1
NC
1
CO
2
TX
The RF link relay can be used as a fault mes-
sage contact to indicate the failure of the wire-
less connection to the controller.
SATEL-LP8
106917_en_00 SATEL 11
6.4 Assembly/removal
Connection station with I/O extension modules
Up to 32different I/O extension modules can be connected
to every wireless module via the DIN rail connector (see ac-
cessories). Data is transmitted and power is supplied to the
I/O extension modules via the bus foot.
Figure 6 SATEL-LP connection station with up to
32I/O extension modules
Figure 7 Mounting and removing
Assembly
When using the device in a connection station, use the
17.5 mm wide DIN rail connector supplied. Only use the DIN
rail connector in connection with 24 V DC devices.
Connect the DIN rail connectors together for a connec-
tion station.
Push the connected DIN rail connectors into the DIN
rail.
Place the device onto the DIN rail from above. Ensure
the device and DIN rail connector are aligned correctly.
Holding the device by the housing cover, carefully push
the device towards the mounting surface so that the de-
vice bus connector is securely fixed onto the DIN rail
connector.
Once the snap-on foot has been audibly snapped onto
the DIN rail, check that it is fixed securely. The device is
only mechanically secured via the DIN rail.
Connect the desired number of I/O extension modules
to the wireless module via the DIN rail connector.
Install the device in suitable housing to meet the re-
quirements for the protection class.
During startup, check that the device is operating,
wired, and marked correctly.
Removing
Use a suitable screwdriver to release the locking mech-
anism on the snap-on foot of the device.
Hold onto the device by the housing cover and carefully
tilt it upwards.
Carefully lift the device off the DIN rail connector and the
DIN rail.
The I/O extension modules must only be
mounted to the right of the wireless module.
RAD-ID
SPORT
PWR
DAT
ERR
RX TX
0
1
Reset
D(A)
D(B)
RX
CO
1
TX
CO
2
GND
NC
1
+24 V
RSSI+
0V
ANT
RSSI-
RAD-2400-IFS
RAD-ID
SPORT
PWR
DAT
ERR
RX TX
0
1
Reset
D(A)
D(B)
RX
CO
1
TX
CO
2
GND
NC
1
+24 V
RSSI+
0V
ANT
RSSI-
IO-MAP
PWR
DAT
ERR
0
1
IO-MAP
PWR
DAT
ERR
0
2
IO-MAP
PWR
DAT
ERR
0
3
IO-MAP
PWR
DAT
ERR
0
4
IO-MAP
PWR
DAT
ERR
0
5
IO-MAP
PWR
DAT
ERR
0
6
IO-MAP
PWR
DAT
ERR
3
1
IO-MAP
PWR
DAT
ERR
3
2
DI1
DI2
DO1
DO3
DI1
DI2
DO1
DO2
DI1
DI2
DI3
DI4
DO1
DO2
DO3
DO4
DI4
DI3
DI2
DI1 DO1
DO2
DO3
DO4
A
B
C
DE
SATEL-LP8
106917_en_00 SATEL 12
6.5 Connecting the cables
Figure 8 Connecting the cables
Crimp ferrules to the wires.
Permissible cable cross section: 0.2...2.5mm².
Insert the wire with ferrule into the corresponding con-
nection terminal block.
Use a screwdriver to tighten the screw in the opening
above the connection terminal block.
Tightening torque: 0.6Nm
6.6 Serial pin assignment
Connect the I/O device to the wireless module via the re-
quired serial interface.
Shielding
Connect the shield connection of the RS-485 bus cable
correctly via an external shield connection clamp.
Choose the type of shield connection according to the type
of interference expected:
Firstly, connect the shield on one side. This suppresses
electrical fields.
To suppress disturbances caused by alternating mag-
netic fields, connect the shield on both sides. When do-
ing so, the ground loops must be taken into account:
galvanic disturbances along the reference potential can
interfere with the useful signal, and the shielding effect
is reduced.
If several devices are connected to a single bus, the
shield must be connected to each device (e.g.,by
means of clamps).
Connect the bus shield to a central PE point using short,
low-impedance connections with a large surface area
(e.g.,by means of shield connection clamps).
Activating/deactivating the termination network
The wireless module is operated on a 2-wire bus line. For
correct operation of the bus system, termination networks
are required for the RS-485 bus connection.
Terminate an RS-485 bus cable at both bus ends. To do
so, verify the position of the wireless module on the
RS-485 bus cable and set the required operating mode
via the DIP switch.
Figure 9 DIP switches
Parallel operation of the interfaces is not pos-
sible.
NOTE: damage to the interface
A faulty connection of the shield in combina-
tion with permanent external interferences
can cause damage to the RS-485 interface.
Observe the polarity of the RS-485 2-wire ca-
ble and ensure that the shield connection is
connected correctly.
DIP
Operating mode Termination
network
1 2
RS-485 termination
device
ON ON ON
RS-485 device OFF OFF OFF
+24V
RSSI+ RSSI-
AN
T
C
O
M
1
N
O
1
N
C
1
RX TX G
ND
D
(A
)
D
(B
)
Reset
RAD-ID
S.PORT
8
8
P
W
R
DAT
ERR
R
X
T
X
0V
+
2
4
V
RSSI+
RSSI-
0
V
1.2 1.1
2.2 2.1
6.3 6.2
5.3 5.2
6.1
5.1
4.2
4.1
D
C
D
C
IFS
IFS
R
F
S
-P
ort
R
A
D
-ID
0
1
RS
4
85
R
s23
2
0V
+
24
V
RS
S
I-
RS
S
I+
N
C
1
N
O
1
C
O
M
1
G
N
D
T
X
R
X
D
(B
)
D
(A
)
µC
OFF
ON
D
IP
S
1
2
1
RS
4
8
5
Te
r
m
in
a
te
“O
F
F
“O
F
F
O
F
F
RS
4
8
5
Te
r
m
in
a
t
e
“O
N
“O
N
O
N
2
1
c 12
21
OFF
ON