Chapter 4 - Optional equipment 7400 Series UPS User Manual
4-Way AS400 Interface Board (4590045F) Single Module and One plus One Systems
6310018a.02.doc
4-4
Issue 2
(02/98)
4.2 4-Way AS400 Interface Board (4590045F)
The 4-way AS400 Interface board connects five critical UPS alarms to
four output terminal blocks M1 - M4 as shown in figure 4-2. These alarm
signals can be connected to a IBM AS400 computer designed to monitor
such alarms, or to a Remote Alarm Monitor panel.
The alarms monitored are:
• Mains failure
• Load on inverter
• Low battery and/or battery circuit breaker open
• Load on mains (bypass)
• Load on maintenance bypass
The signals commonly interfaced with the AS400 are:
• Mains failure
• Load on inverter or UPS ON
• Low battery .
These alarm signals are provided by volt-free relay contacts (maximum
rating 50V @ 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.
The 4-way AS400 Interface Board is also positioned in the UPS cabinet
(below the power isolators), and connected to the UPS control
electronics by a ribbon cable (FC13 in 80-120 and 200 kVA modules
and FC19 in 300-400 kVA modules) connected to CN1.
The Interface Board has facilities to accept two remote control inputs, as
shown in figure 4-2. One remote input allows the inverter to be shut
down (transferring the load to the bypass supply) and the other enables
the inverter synchronisation feature to be inhibited. The inverter
synchronisation inhibit feature is most often used if the UPS is powered
from a standby generator when the input mains supply fails and the
generator frequency is unstable.
The external control signals (12V dc or ac) should be connected to
terminal block M1 as shown in figure 4-2. Once again, the voltage
applied to these terminals must be generated by an external power source
and not taken from the UPS internal low voltage supplies.
When fitting the AS400 interface board to the 7400 series, ensure that
link SH-1 is in position 1-2.
4.2.1 Remote control inputs
4.2.2 Calibration
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