User Manual

MorphoAccess® Sigma Series – Installation Guide
Section 4 :
Electrical Interface
SSE-00000XXXXX-01
MORPHO DOCUMENT – REPRODUCTION AND DISCLOSURE FORBIDDEN
41
September 2013
RS485
Figure 20: Serial port wiring – RS485
A
5
Digital ground
Ground for Wiegand (connect pin 5 or 6)
6
Digital ground
Ground for Wiegand (connect pin 5 or 6)
D
5
RS485 TX / RX +
Out
RS485 non inverting signal
6
RS485 TX / RX -
Out
RS485 inverting signal
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 21: Serial port wiring – RS422
A
5
Digital ground
Ground for Wiegand (connect pin 5 or 6)
6
Digital ground
Ground for Wiegand (connect pin 5 or 6)
D
3
RS422 RX-
In
RS422 inverting Receive
4
RS422 RX+
In
RS422 non inverting Receive
5
RS422TX+
Out
RS422 non inverting Transmit
6
RS422TX-
Out
RS422 inverting Transmit
RS422 interface is a full duplex communication.
1
6
1
6
1
6
1
6
A B C D
1
6
1
6
1
6
1
6
A B C D