77
Contact Closure Input Control Wiring
The WC-2M-GC and WC-4M-GC accept Class 2, dry
contact closure inputs. The contact closure inputs for this
unit may be either momentary or maintained. The contact
closure type selected using the Options switch #5 (OFF =
Momentary, ON = Maintained). Momentary dry contact
closure inputs require a minimum closure time of 0.2
seconds.
The contact closure device must be able to switch 2 mA
at 30 Vdc. If multiple channels or Group Controllers are
wired in parallel to one contact closure, the contact
closure device must be rated for the total current of all the
channels or Group Controllers wired together (total
current = 2 mA times the number of Group Controllers or
channels in parallel). Example, if you connect 4 Group
Controllers in parallel, the contact closure device would
need to be rated for at least 8 mA, at 30 Vdc.
Change the
desired channel’s
output direction by
switching the
corresponding
Options switch
Configuring the Motor Direction for the
Open and Close Functions
For each Channel of the unit, the motor’s direction of
rotation needs to be configured for the Open and Close
functions so that the AC Motor will move in the proper
direction. This is accomplished using the Options
Switches, #1 through #4. This step needs to be performed
whether each channel is controlled individually or all
channels are controlled together.
1. Restore power to unit. Once the appropriate line
voltage and motor connections have been made to the
unit, replace the cover on the line voltage wiring
compartment. Remove the cover from the Class 2
wiring compartment. Turn power back ON.
2. Determine AC motor position. Determine whether
the AC Motor that is controlled by Channel 1 is open
or closed. If it is open, press the Close 1 manual
override button. If it is closed, press the Open 1
manual override button. If the AC Motor moves to the
desired position, the Channel is configured properly.
Proceed to Step 4. If the AC Motor does not move to
the desired position, proceed to Step 3.
3. Verify motor movement. If the AC Motor did not
move to the desired position in the prior step, slide the
Options Switch #1 to the opposite position. Press the
same button again that was pressed in Step 2 (Open
or Close). If the AC Motor moves to the desired
position Channel 1 is now configured properly.
Proceed to Step 4.
4. Repeat for remaining motors. Repeat Steps 2 and 3
for the rest of the Channels that are connected to AC
Motors. Options Switch #2 configures Channel 2,
Options Switch #3 configures Channel 3*, and Options
Switch #4 configures Channel 4*.
Each motor channel has a contact closure input terminal
block. In addition, the unit has a master control contact
closure input terminal block. The master control contact
closure input will operate all four motor channels
simultaneously. See the wiring diagrams on pages 10–11.
The stop function can be achieved either by providing a
contact closure input to the stop terminal of the input
terminal block, or by simultaneously providing a closure
on the open and close terminals of the input terminal
block. Both stop methods will be addressed in the wiring
diagrams on pages 8–11.
2
3
Note: Do not change the position of Options Switch #5.
This switch is used to change the contact closure input
type. See section Setting the Contact Closure Input Type
on page 12 for more details on the Options Switch #5.
* Channel 3 and 4 are only available on Group Controller model GRX-
4M-GC.
