Chapter 4 - Optional equipment 7400 Series UPS User Manual
AS400 Interface Board (4590041 B) Single Module and One plus One Systems
6310018a.02.doc
4-8
Issue 2
(02/98)
4.4 Remote Alarm Monitor (RAM) (P/N 4305001Z)
When used in conjunction with one of the alarm interface boards
described previously, the Remote Alarm Monitor enables the auxiliary
alarm signals to be displayed at a remote station up to 200 metres from
the main equipment.
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 Indication 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 mains are out of tolerance.
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 the 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 4-1
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’pushbutton cancels the audible warning but the alarm indications
remain until the condition is rectified.
Power supply
The RAM contains a single phase 220-240 Vac mains-driven power
supply. Power is applied through a standard CEE22 three-pin fused
mains connector located in the RAM top panel (plug provided) - use 3-
core 0.5mm cable (min).
The supply is rated at approximately 4 Watts and fused at 1A.
It is advised that this power supply is taken from the output of the UPS,
otherwise in the event of a mains power supply failure the RAM will 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 top of the RAM and
should be cabled to the AS400 Interface Board (4590041B or
4590045F), fitted to the UPS, using 9 core, 0.22mm. (minimum) cable as
shown.
4.4.1 Connections
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