Liebert 130 kVA - Manual (Page 99)

User Manual
Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V
79
10.1 Remote Alarm Monitor
The Remote Alarm Monitor (RAM) Board can be used in conjunction with the AS400
Alarms Interface Board to display the UPS alarm and status information at a remote
station to 100 meters from the UPS.
The RAM, which can be mounted either horizontally or vertically contains a mains-
driven power supply for alarm LED annunciation and displays the following warnings:
Panel Colour Normal
state
Interpretation
Inverter ON Green ON Normal operating condition indicating that the load is being supplied by the inverter.
This is not an 'alarm’ indicator.
Utility failure Red OFF When lit, it indicates that the input bypass is out of tolerance or missing.
Battery low Red OFF When lit, it indicates that the battery voltage is below minimum or that the battery
circuit breaker is open.
Bypass ON Red OFF When lit, it indicates that the load is being fed from the bypass supply, possibly due
to a UPS failure.
Maintenance Red OFF When lit, it indicates that the UPS has been selected to operate on the maintenance
bypass and load is unprotected.
Alarm Red OFF This is a ‘common alarm’ and is lit when any of the red leds described above are lit
Table A
An audible warning accompanies any of the above alarm conditions. This is, however,
subject to a short time delay when activated in conjunction with the 'Utility Failure' and
'Bypass ON' alarms, to prevent the warning being activated by transient conditions.
Pressing the 'reset' push-button cancels the audible warning but the alarm indications
remain until the conditions is rectified.
10.1.1 RAM Connections
Power Supply
The RAM contains a single-phase 220-240 V AC mains-driven power supply. Power is
applied through a standard three-pin mains connector located in the RAM back panel
(plug provided) -use 3-core 0.5 mm cable (minimum). The supply is rated at
approximately 4 Watts and fused at 1 A.
It is advised that the power supply is taken from the UPS output, otherwise in the
event of a mains failure the RAM may be inoperative.
Alarm connections
A 9 pin D-type connector with solder points is provided with the RAM. This connector
fits into the 9 pin socket on the back of the RAM and should be cabled to the Interface
Board # 10020112003 fitted to the UPS, using 9 core, 0.22 mm. (minimum) shielded
cable as shown. The maximum recommended distance is 100 meters.
Note: Operation of the RAM indicators, is achieved by feeding a voltage across the module Alarm
Board relay contacts. No other connections should be made across the relay contacts used.