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Raychem-AR-H58692-ACS30UIT2Programming-EN-1805
OK Button
Tapping on the OK button will prompt you asking if you would like to overwrite the
original schedule with the new preset schedule. After a decision is made, you will be brought back to
the main Scheduler window.
Change Day Buttons
As with the main window, tapping on these buttons will navigate you
throughout.
5.3. APPENDIX 5.3 CONNECTING EXTERNAL CONTROL DEVICES
The ACS-30 system allows the user to connect the dry contact outputs of BMS systems or external
devices to control the heating cable circuits. In this manual they consist of two categories; circuit
override and circuit control. Both external control modes use the logic that when the contacts are
closed the circuit should be energized and when open the circuit should be off.
In the pipe freeze protection, fuel oil flow maintenance and floor heating application modes, dry
contact outputs may be connected to the RTD inputs in the ACS-PCM2-5 panel, or the external
device input terminals of the C910-485 controller, to provide auxiliary override to the temperature
input.
The Roof & Gutter De-icing and Surface Snow Melting control modes include an External Device
control option. This option allows a Snow/Moisture sensing controller to be integrated in to the
ACS-30 system.
The general approach is that each of the snow controllers has a set of contacts to turn on a heating
cable circuit. The contacts can be connected to the RTD input terminals in the ACS-PCM2-5 power
panel, or the external device input terminals of the C910-485 controller, that can interpret the open
and closed relays as commands to turn on or off the heating cable circuits. Up to four different
snow controllers may be mapped to a single circuit or may be shared to many different circuits.
LC = Line current GF = Ground fault
ACS-PCM2-5 / Circuit #
1
LC
GF
Output
Relay 1
Local/A
RTD
2
LC
GF
Output
Relay 2
Local
RTD
3
LC
GF
Output
Relay 3
Local
RTD
4
LC
GF
Output
Relay 4
Local
RTD
5
LC
GF
Output
Relay 5
Local
RTD
External Override device,
BMS output or snow controller
EUR-5A
APS-3C
GIT-3A*
LCD-7A
* Requires external dry contact.
Dry
alarm
contact
Fig. 5.5 External Device Control
