Chapter 4 - Optional equipment 7200 Series UPS User Manual
AS400 Alarm Interface Board (4590055P) Single Module and 1+1 Parallel System
document in response to "powersure ups"
Page 4-2
Issue 6
(03/98)
4.1 AS400 Alarm Interface Board (4590055 P)
The Alarm Interface board is fitted in the right hand side of the unit, on the front lower face ( see
figure 4-2 ) near the auxiliary terminal block ( X3 ) and is connected to the UPS control electronics (
UPS Logic board ) by a ribbon cable (W10), which is normally stowed in the cable loom when not in
use. The board has several functions as described below.
4.1.1 Remote control inputs
The Interface Board has facilities to accept three remote control inputs, as shown in figure 4-1. One
remote input allows the inverter to be shut down ( transferring the load to the bypass supply ). The
second remote input can be configured to reduce the input current limit, reduce battery current limit,
inhibit inverter synchronization. This feature is most often used when the input mains supply fails, and
the UPS is powered from a standby generator, which may not be large enough to maintain power
supplies within the normal parameters. The third remote input is not used at this time (spare).
The external control signals ( 12V d.c. or a.c. ) should be connected to terminal block X5 as shown in
figure 4-1. The voltage applied to these terminals must be generated by an external power source and
not taken from the UPS internal low voltage supplies.
4.1.2 AS400 Interface
The AS400 Interface connects the five most operationally critical UPS alarms to an IBM AS400
computer, which is designed to monitor such alarms and respond to their appearance.
The alarms in question are:
• Mains failure
• Load on UPS
• Low battery and/or battery circuit breaker open
• Load on mains (bypass)
• Load on maintenance bypass
Connection to the AS400 is provided on the Interface Board via a terminal block X3. These alarm
signals are provided by volt-free relay contacts, Maximum contact rating is 50 Vcc @ 1 Amp.
4.1.3 Alarm outputs
In addition to the AS400 alarm outputs the Interface Board also contains a number of relays whose
contacts provide a set of volt-free alarm outputs that are connected to terminal block X4 as shown in
figure 4-1. These outputs can be used to drive an external alarms monitoring device. Maximum contact
rating on M1 terminals = 50 Vcc @ 1 Amp.
Note: When using the above contacts for remote alarm annunciation, the power supply for the
remote indicators must be provided from an external power source. Under no circumstances
should the UPS internal low voltage supplies be used for this purpose.
4.1.4 X2 Extension
The X2 connection on the board is provided to interface the UPS systems with the remote alarms board
part number 4590056Q which contains additional alarms.
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