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Demand Setting Procedure; Simultaneous Alarm Output; Changing To Check Mode - Hitachi PSC-A64S Installation And Operation Manual

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7. Simultaneous Alarm Output.

This function is for outputting signal outward in the case where there is any air conditioner in
abnormal condition in the group set by the central station.
The input function is set by DSW2 as shown in the table below:
Function
Simultaneous
Operation/Stoppage
OFF
(Level)
Simultaneous
Operation/Stoppage
(Pulse)
Emergency Stop
OFF
Demand 1~3
OFF
*Both ON and OFF setting are available. Set ON or OFF by the emergency stop or the demand function.
Specifications of Required Components:
- Input: DC12V,10 mA Non-voltage A contact (pulse with more than 300 ms)
- Output: OMRON MY Relay
- Cable: PCC-1A
3
CN2
2
1
3
CN3
2
1
Cable more than 0.5 mm
As for demand input, the group to be controlled can be set when signal is input.

5.1. DEMAND SETTING PROCEDURE

1. Changing to Check Mode.

Depress the "CHECK" switch for more than 3 seconds, and the central station is changed to the
check mode.
* When there is any group in operation (with "RUN" indicator ON), the "CHECK" mode is not available.
INPUT/OUTPUT FUNCTION
DSW Pin Nº
1
2
3
*
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
Cable with Connector (Option): PCC-1A
2
(Field-supplied, max. length: 70m)
Remarks
4
OFF
CN2 1-2 Pin Contact Connection
OFF
CN2 1-2 Pin Contact Connection
OFF
CN2 2-3 Pin Contact Connection
OFF
CN2 2-3 Pin Contact Connection
Non-voltage A contact Input
RYa
R
15

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