Instruction Manual
Publication 1753-UM001C-EN-P - March 2010 65
Wire the GuardPLC 2000 Controller and I/O Chapter 5
Wire the 1755-IB24XOB16
Digital I/O Module
This module is a combination I/O module featuring 24 safety-related
digital inputs and 16 safety-related digital outputs.
• Inputs: The sockets with pins 2…9, 11…18, and 20…27 provide
the 24 digital inputs I1…I24. Pins 1, 10, and 19 are the common
positive poles (LS+). Each group of 8 inputs has current limits of
100 mA.
• Outputs: The sockets with pins 29…36 and 38…45 provide the
16 digital outputs O1…O16. Pins 28 and 37 are the common
negative poles (L-) for the output loads.
• Each output channel can be loaded with 2 A, but the total load
of all 16 outputs must not exceed 8 A.
RUN
ERR
1755-
IB24XOB16
1
2
3
4
5
6
7
8
9
LS+
I1
I2
I3
I4
I5
I6
I7
I8
10
11
12
13
14
15
16
17
18
LS+
I9
I10
I11
I12
I13
I14
I15
I16
19
20
21
22
23
24
25
26
27
LS+
I17
I18
I19
I20
I21
I22
I23
I24
28
29
30
31
32
33
34
35
36
L-
O1
O2
O3
O4
O5
O6
O7
O8
37
38
39
40
41
42
43
44
45
L-
O9
O10
O11
O12
O13
O14
O15
O16
Terminal
Number
Designation Function Terminal
Number
Designation Function
1 LS+ Digital input supply
for inputs 1…8
24 I21 Digital input 21
2 I1 Digital input 1 25 I22 Digital input 22
3 I2 Digital input 2 26 I23 Digital input 23
4 I3 Digital input 3 27 I24 Digital input 24
5 I4 Digital input 4 28 L- Reference pole for
outputs 1…8
6 I5 Digital input 5 29 O1 Digital output 1
7 I6 Digital input 6 30 O2 Digital output 2
8 I7 Digital input 7 31 O3 Digital output 3
9 I8 Digital input 8 32 O4 Digital output 4
10 LS+ Digital input supply
for inputs 9…16
33 O5 Digital output 5
11 I9 Digital input 9 34 O6 Digital output 6
12 I10 Digital input 10 35 O7 Digital output 7
13 I11 Digital input 11 36 O8 Digital output 8
14 I12 Digital input 12 37 L- Reference pole for
outputs 9 …16
15 I13 Digital input 13 38 O9 Digital output 9
16 I14 Digital input 14 39 O10 Digital output 10
17 I15 Digital input 15 40 O11 Digital output 11
18 I16 Digital input 16 41 O12 Digital output 12
19 LS+ Digital input supply
for inputs 17…24
42 O13 Digital output 13
20 I17 Digital input 17 43 O14 Digital output 14
21 I18 Digital input 18 44 O15 Digital output 15
22 I19 Digital input 19 45 O16 Digital output 16
23 I20 Digital input 20