Chapter 4 - Optional equipment 7400 Series UPS User Manual
AS400 Interface Board (4590041 B) Single Module and One plus One Systems
6310018a.02.doc
4-2
Issue 2
(02/98)
4.1 AS400 Interface Board (4590041B)
The AS400 Interface board 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 inverter
• Low battery and/or battery circuit breaker open
• Load on mains (bypass)
• Load on maintenance bypass
These alarm signals are provided by volt-free relay contacts.
The AS400 Interface Board is fitted to the bottom of the UPS cabinet door
and connected to the UPS control electronics by a ribbon cable (FC13 in
the 80/120/200 kVA models and FC19 in the 300 - 400kVA models )
which is fitted to all modules and normally stowed in the cable loom when
this option is not used.
Two female D-type connectors are provided on the Interface Board to
enable the above signals to be connected to the AS400 computer. One
connector, CN1, has 9 pins and the other, CN2, has 15. Figure 4-1
provides pin-out details for these connectors.
Note: Use one connector only -i.e.
don't use both connectors simultaneously.
In addition to the D-type connectors, the AS400 Interface Board also
contains a number of volt-free relays whose contacts provide a duplicate
set of volt-free alarm outputs that are connected to terminal block M1
Äas 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.
The Interface Board has facilities to accept two 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) 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 M2 as shown in figure 4-1. 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.
4.1.1 AS400 Interface Board
outputs
4.1.2 Remote control inputs
4.1.3 Calibration
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