nVent.com
|
133
Raychem-AR-H58692-ACS30UIT2Programming-EN-1805
CONNECTING EXTERNAL DEVICE INPUT (SNOW CONTROLLER, OVERRIDE DEVICE)
1. Connect 2-wire shielded cable from the normally open position of the external device dry
contacts to the RTD input terminals on the ACS-CRM board located within the ACS-PCM2-5
power control panel, or to the external device input terminals of the C910-485 controller. Refer to
ACS-PCM2-5 Installation Instructions (H58672) for further information.
2. For the ACS-PCM2-5 panel, connect the cable to terminals 1 and 3 with a jumper between
position 2 and 3 as shown below:
External Device or Snow
Controller (Dry Contact)
Ground
Jumper
No
4
3
2
1
ACS-PCM2-5
Chassis Ground
ACS-30
C910-485
ACS-CRM
Boar
d R
TD
Input
6
4
3
C910-485 Controller
+12 VDC
EXTERNAL DRY CONTACT
COMMON
7
(CLOSE TO ACTIVATE
INHIBIT / OVERRIDE MODE)
+
-
(2K Ohms MAX TOTAL LOOP
RESISTANCE)
EXTERNAL INPUT
Fig. 5.6 External Device Connection
The following wiring diagrams depict how to connect the different snow controllers to the
ACS-PCM2-5 RTD or C910-485 input terminals:
APS-3C
1. Connect a 470K
Ω
1/4W resistor across terminals 10 and 11. This resistor simulates the RTD
input required for the APS-3C which is now supplied by the ACS-30.
2. Connect 2-wire grounded/shielded cable from terminals 14-15 (normally open position) to the
RTD input positions 1 and 3 and jump positions 2-3 on the ACS-PCM2-5, or terminal XXXX on
the C910-485.
