Instruction Manual

Publication 1753-UM001C-EN-P - March 2010 59
Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers Chapter 4
Upper Terminal Block
All eight of the digital output zero-voltage reference terminals are
common. Unlike the GuardPLC 1600 and GuardPLC 1800 controllers
or distributed I/O, which have an earth ground screw, the
GuardPLC 1200 controller’s earth ground should be wired to the PA
terminal, marked .
Terminal Number Designation Function
1 Not Used None
2 I1 Digital input 1
3 I2 Digital input 2
4 I3 Digital input 3
5 I4 Digital input 4
6 I5 Digital input 5
7 I6 Digital input 6
8 I7 Digital input 7
9 I8 Digital input 8
10 I9 Digital input 9
11 I10 Digital input 10
12 I11 Digital input 11
13 I12 Digital input 12
14 I13 Digital input 13
15 I14 Digital input 14
16 I15 Digital input 15
17 I16 Digital input 16
18 I17 Digital input 17
19 I18 Digital input 18
20 I19 Digital input 19
21 I20 Digital input 20
22 I- Reference pole
23 I- Reference pole
24 I- Reference pole
25 I- Reference pole