3-30
95-8533
18.2
Connector P3, Terminals 1 to 12
Terminals A,B & C
Channels 1 to 4 Input / Output Terminals
Refer to individual wiring configurations for
terminal descriptions. Only channel 1 is shown
in each diagram. The information is typical for
channels 2-8.
Connector P4, Terminals 13 to 24
Terminals A, B & C
Channels 5 to 8 Input / Output Terminals
Refer to individual wiring configurations for
terminal descriptions. Only channel 1 is shown
in each diagram. The information is typical for
channels 2-8.
Unsupervised Input
Connect external system wiring to the
appropriate terminals on the terminal block.
See Figure 3-24.
The input to the EDIO consists of one or more
normally open or normally closed switches. An
EOL resistor is not required.
Make no connection to “+ Supply” terminal.
Supervised Input (IDC) Open Circuit
Supervision
Connect external system wiring to the
appropriate terminals on the terminal block.
For Class B wiring, see Figure 3-25. For
Class A wiring, see Figure 3-26. Note that two
channels are used for one circuit when using
Class A wiring.
The input to the EDIO module consists of one
or more normally open switches, with a 10 K
ohm, 1/4 watt EOL resistor in parallel across
the last switch.
Make no connection to “+ Supply” terminal.
Supervised Input Open and
Short Circuit Supervision
Connect external system wiring to the
appropriate terminals on the terminal block.
For Class B wiring, see Figure 3-27. For Class A
wiring, see Figure 3-28. Note that two channels
are used for one circuit when using Class A
wiring. Both wiring configurations provide
indication of open and short circuit fault.
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
EOL
RESISTOR
10 K Ω
Figure 3-25—Supervised Input Conguration – Class B
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
EOL
RESISTO
10 K Ω
INLINE
RESISTOR
3.3 K Ω
C2092
Figure 3-27—Supervised Input Conguration
for Opens and Shorts – Class B
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
+ SUPPLY A
IN– / OUT+ B
COMMON C
4
5
6
B2291
EOL
RESISTOR
10 K Ω
Figure 3-26—Supervised Input Conguration – Class A
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
+ SUPPLY A
IN– / OUT+ B
COMMON C
4
5
6
INLINE
RESISTOR
3.3 K Ω
EOL
RESISTOR
10 K Ω
Figure 3-28—Supervised Input Conguration
for Opens and Shorts – Class A
+ SUPPLY A
IN– / OUT+ B
COMMON C
1
2
3
C2090
Figure 3-24—Unsupervised Input Conguration