INFICON I/O1000 I/O module - Manual (Page 13)

Description 13
9 - RS485
Connection for RS-485
A: Active bus terminator
B: No bus terminator
C: Passive bus terminator
Electrical insulation (max. 60 V DC, 25 V AC against GND)
Connection plug arrangement
Information The bus terminator integrated in the I/O module (120 Ω) between D+
and D can be disabled via DIP switches S2-4.
The BUS address is 1.
BUS operation with more than two subscribers is not possible.
10 - 24V OUT
24V output
Connection plug arrangement
Information The I/O module is supplied with voltage by the MS module and requires
no separate power supply. The 24V output is not used for voltage
supply to the I/O module.
The 24V output of the I/O module can be used as an active signal for the PLC inputs
and outputs.
Fig: 5 RS-485 bus terminator
Pin Name
1 Connect pull-up resistor (562 Ω against +5 V) with D+ if necessary
2 D+
3 D-
4 Connect pull-down (562 Ω against GND) with D- if necessary
5 COM
Pin Name
+ +24 V
- GND
1
2
3
4
5
562 Ω
120 Ω
562 Ω
DIP S2-4
RS485
D+
D-
+5 V
0 V
I/O-Modul
A: aktiv
1
2
3
4
5
562 Ω
120 Ω
562 Ω
DIP S2-4
RS485
D+
D-
+5 V
0 V
I/O-Modul
B: ohne
1
2
3
4
5
562 Ω
120 Ω
562 Ω
DIP S2-4
RS485
D+
D-
+5 V
0 V
I/O-Modul
C: Passiv