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ICE EC06-20HDNC1U I&O Manual 07/2020 Rev.1
2.6 EC20HDNC1U Wiring Diagram & Electrical Connections
Figure 5. EC20HDNC1U Power/Monitor/Alarm Connections
Type
Pin
Description
Power Input
L1/L
L:220VAC power input cable L; L1:110VAC power input
cable L
L2/N
N:220VAC power input cable N; L2:110VAC power
input cable L
PE
Grounding wire of the air conditioner
Alarm Output
NC
The NC contact of the first public alarm dry contact
output
COM The COM contact of the first public alarm dry contact
output
NO
The NO contact of the first public alarm dry contact
output (optional)
1
The COM contact of the second public alarm dry con-
tact output (optional)
2
The NO contact of the second public alarm dry contact
output (optional)
Alarm Input
3
N/A
4
Hydrogen discharge / emergency fan dry contact (FG)
(Optional)
5
Hydrogen discharge / emergency fan dry contact (NO)
(Optional)
6
Hydrogen discharge / emergency fan dry contact
(COM) (Optional)
7
The contact of door open alarm input (optional)
8
Communication
+
RS485 communication ports (+) (Optional)
-
RS485 communication ports (-) (Optional)
Table 4. EC20HDNC1U Monitor/Alarm Connections
The alarm dry contact COM/NC normally close output. When a faults occur, the dry
contact will open.
Note:
Contact capacity: Max load 8A@230VAC( 2A@48VDC).(optional)
