Installation Guide

C
C
O
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M
R
R
S
S
4
4
2
2
2
2
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MA5xx OMA5xx
COM RS422/RS485
cable
1 Block 1 GND Ground for RS422 Grey or White
2 Block 2 Tx- Out RS422 Negative Transmit Orange
3 Block 3 Tx+ Out RS422 Positive Transmit Orange/White
4 Block 4 Rx- In RS422 Negative Receive Green
5 Block 5 Rx+ In RS422 Positive Receive Green/White
RS422 interface is a full duplex communication.
C
C
O
O
M
M
R
R
S
S
4
4
8
8
5
5
s
s
e
e
r
r
i
i
a
a
l
l
p
p
o
o
r
r
t
t
MA5xx OMA5xx
COM RS422/RS485
cable
1 Block 1 GND Ground for RS485 Grey or White
2 Block 2 Tx- Out RS485 Negative Transmit Orange
3 Block 3 Tx+ Out RS485 Positive Transmit Orange/White
4 Block 4
5 Block 5
RS485 implementation is limited to half-duplex communication. So only Tx+ and Tx-
and ground reference signals are necessary.
Depending on the RS485 network, an impedance adaptation may be required.
For farthest terminal, a 120 Ohms resistor termination may be added to the
terminal, by strapping block 2 and block 3.
SK-53018-03 SAGEM Sécurité document. Reproduction and disclosure forbidden.
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