9
ICE by Envicool DC Cabinet Cooler I&O Manual
08/2020 Rev.7
Select proper wire diameter and circuit protection device according to the air conditioner
data label and technical parameters.
Perform the electrical connection in accordance with the following steps:
1. Make sure that the air conditioner power is disconnected.
2. Connect the power cable to the input terminal according to the schematic diagram
for power terminal.
3. Connect the power input terminal to the attaching plug of the unit securely and
tighten the terminal screws.
4. Connect the other end of the power cable to the power supply according to the
specifications.
5. Connect the communication & alarm output cable to the input terminal according
to the specifications.
6. Connect the communication & alarm output terminal to the attaching plug of the
unit securely and tighten the terminal screws.
7. Check whether any short circuit or open circuit exists on the power supply cable.
8. Check whether any short circuit or open circuit exists on the communication &
alarm output cable.
2.5 Wiring Diagram & Electrical Connections
Figure 4. Wiring Diagram
Power Input Cable:
-48V DC power input cable.
Signal Cable:
Signal cable includes: communication cable and alarm output cable.
1.
Monitoring output:
The unit’s RS485 communication cable. Refer to Figure 4.
2.
Alarm output:
The unit provides two alarm output dry contacts. If there is no alarm, the dry
contact is closed. When there is alarm, the dry contact will open.
Contact capacity: Resistive load 5A@30VDC/5A@277VAC.
