7
ICE EX04-18 Heat I&O Manual 06/2020 Rev.1
DC Power input:
If the unit using -48V DC power input, the connection diagram is shown in Figure 2.2.
please be sure to connect power supply in accordance with instructions.
Figure 3. DC Power Input Wiring Diagram
2.6 Monitoring
IMPORTANT
Please refer to the specific wiring definition mark on the unit.
The heat exchanger provides normally open or normally closed alarm output dry
contacts, when the high temperature alarm, low temperature alarm, sensor failure alarm,
fan failure alarm and other faults are triggered, the output’s status changes.
For detailed information Please check the table 2.1 9PIN terminal definitions.
Monitoring Output:
The RS485 monitoring connector definition is following
Pin
Definition
RS485+ RS485 communication ports (+) (up-
stream equipment monitoring interface)
RS485- RS485 communication ports (-) (up-
stream equipment monitoring interface)
4
GND
3
Door open alarm (Optional)/Hydrogen
discharging/emergency fan contact
input (Optional)
2
Hydrogen discharging/emergency fan
alarm dry contact NC (Optional)
1
Hydrogen discharging/emergency fan
alarm dry contact COM (Optional)
NC
Public alarm dry nod (NC)
COM
Public alarm dry nod (COM)
NO
Public alarm dry nod (NO)
Table 2
9PIN Connection Interface
Figure 4.
9PIN Connection Interface
2.7 Hydrogen Discharge/Emergency Fan Connection (optional)
Notice:
Contact capacity: max load 2A@48VDC.
Hydrogen discharge / emergency fan(DC input) connection interface diagram;