Series 7400 Single Phase 1+N UPS

4.2 4-WAY AS400 Interface Board (#100201120004)

4.2.1Remote Control Inputs

4.2.2 Calibration

The 4-way AS-400 Interface board connects fiver critical UPS alarms to four output terminal blocks M1 - M4 as shown in figure

22.These alarm signals can be connected to a IBM AS 400 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

*Load on mains (bypass)

*Load on maintenance bypass

The signals commonly interfaced with the AS400 are:

oMains failure

oLoad on inverter or UPS ON o Low battery

These alarm signals are provided by volt-free relay contacts.

Note: When using the above contacts for remote alarm annuciation, 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 (FC17 in 25-40 kVA modules and FC13 in 50-125k VA single phase modules) connected to CN1.

The Interface Board has facilities to accept two remote control inputs, as shown in figure 22. 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. This facility is valid only for single module. The inverter synchronisation inhibit feature is most often used if the UPS is powered from a stand by generator when the input mains supply fails and the generator frequency is unstable.

The external control signals (12V / 24V) should be connected to the terminal block M1 as shown in figure 22. 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.

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Emerson 7400 user manual WAY AS400 Interface Board #100201120004

7400 specifications

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