User's Manual

MorphoAccess® SIGMA Extreme Series - Installation Guide
Section 4 : Electrical Interface
Identity & Security
2017_2000024418 - Draft
V0
January 2017
This document and the information therein are the property of Safran Identity & Security.
They must not be copied or communicated to a third party without the prior written authorization of Safran
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RS485
Figure 19: Serial port wiring – RS485
9
Blue / Black
RS485_RXTX+
In/Out
RS485 Rx/Tx non inverting signal
11
Blue / White
RS485_RXTX-
In/Out
RS485 Rx/Tx inverting signal
7
Black / Red
RS485_GND
Ground
RS485 implementation is limited to half-duplex communication. So only Tx+, 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 outside the
terminal between TX+ and TX-.
RS422
Figure 20: Serial port wiring – RS422
9
Blue / Black
RS422_RX+
In
RS422 non inverting Receive
11
Blue / White
RS422_RX-
In
RS422 inverting Receive
12
Green / Black
RS422_TX+
Out
RS422 non inverting Transmit
10
Green / White
RS422_TX-
Out
RS422 inverting Transmit
7
Black / Red
RS485_GND
Ground
RS422 interface is a full duplex communication.