Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 54)

54 Publication 1753-UM001C-EN-P - March 2010
Chapter 4 Wire GuardPLC 1600, GuardPLC 1800, and GuardPLC 1200 Controllers
Safety-related Digital Output Terminals
Digital outputs are connected to these terminals.
Wire the GuardPLC 1800
Controller The controller has 24 digital inputs whose status is indicated via status
indicators when in Run mode. The digital inputs are actually analog
inputs that provide the program with UINT values of 0…30V
(0…3000), which are used to create limit values to calculate signals for
the digital inputs. Default settings are:
•
<7V = 0 signal.
•
>13V = 1 signal.
The limit values are set by using system variables. See page 328 for
more information on configuring these inputs.
The 24 digital inputs of the GuardPLC 18000 controller can be used as
analog inputs by reading the DI[xx].Value Analog input signal.
However, because these inputs are intended to be used as digital
inputs, the accuracy of their analog values is not guaranteed to the be
same as the published accuracy of the 8 actual analog inputs in the
GuardPLC 1800 controller.
Terminal Number Designation Function Current
1 L- Reference pole —
2 1 Digital output 1 0.5 A
3 2 Digital output 2 0.5 A
4 3 Digital output 3 0.5 A
5 4 Digital output 4 (for increased load) 2.0 A
6 L- Reference pole —
7 L- Reference pole —
8 5 Digital output 5 0.5 A
9 6 Digital output 6 0.5 A
10 7 Digital output 7 0.5 A
11 8 Digital output 8 (for increased load) 2.0 A
12 L- Reference pole —
1 2 3 4 5 6
1 2 3 4
1 L- L- DO 2
(2 A)
3 4
5 6
7 8 9 10 11 12
7 8 9 10
5 L- L- DO 6
(2 A)
7 8
11 12
TIP
Because digital inputs are actually analog values, the .USED
variable must be set HI in the output signal connections dialog
box to activate the digital input.