7 wiring plc i/o, Caution, 1 description of isa main controller unit i/o – FEC AFC1200 User Manual
Page 15
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4.7
Wiring PLC I/O
All interface devices must accommodate active true low logic for correct operation with
AFC1200 inputs and outputs (I/O). Outputs are rated at 12~24 VDC, 200mA. When
activated, open collector sink outputs (normally high) pull the input device signal low
(0 VDC). Inputs are sourced (normally high) and activated when pulled low (0 VDC).
CAUTION:
The PLC I/O wiring must be routed a minimum of 300 mm away from any transient high
voltage sources. Cable length must not exceed 50 feet.
4.7.1 Description of ISA Main Controller Unit I/O
CAL
MANUAL
RESET
REV
START
34
12
9
11
10
8
7
6
31
33
32
30
29
28
13
4
5
3
1
2
26
27
25
23
24
PLC1
14
15
16
17
18
19
20
21
22
PLC2
4
14
6
5
10
9
16
15
1
3
2
8
7
13
11
12
FIG. 4-7-1 ISA Main Unit PLC Connectors (PLC1 and PLC2)
CAUTION:
DO NOT CONNECT A POSITIVE DC VOLTAGE SOURCE TO THE PLC1 INPUT
COMMON OR OUTPUT COMMON, OR DAMAGE MAY RESULT.
Chapter 4: System Setup and Wiring
Page 4-15