TRANSIT Ultimate | installation guide
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4.3.3
RS232
An RS232 interface is available when the RS232 or HIB interface board has been installed.
TRANSIT SIDE
DIN 25
Name
PC SIDE
DIN 9
Name
2
TXD
2
RXD
3
RXD
3
TXD
7
GND
5
GND
Cable specification
3 x 0.25mm2 shielded
Maximum cable length 30 meter.
4.3.4
RS422-485
An RS422 or RS485 interface is available when the RS422-485 interface board has been installed.
SW1 selects RS422 or RS485.
SW2 enables the termination resistor. It is recommended to keep this switch in ON position.
Figure 17: RS422-485 switches.
RS422
RS485
SW1 OFF = RS422
SW1 ON = RS485
RS422-485
RS422 HOST
RS422-485
RS485 HOST
TX
+
RX
+
TX
+
-
TX
-
RX
-
TX
-
-
RX
+
TX
+
RX
+
A (
-
)
RX
-
TX
-
RX
-
B (
+
)
Cable specification
2 x 2 x 0.25mm
2
twisted pair shielded
Maximum cable length 1200 meter.
Warning:
The RS422-485 interface board cannot be used for OSDP communication. Instead use the
PCC485/OSDP converter board. See chapter 3.
