Electrical Installation: Relay Board (Optional)

Relay Board functions

The Relay Board informs the user of the operation mode, status, and alarm conditionsand has 8 ports on the input side and 16 output terminals.

Use Normally Closed (NC) contacts for Fail safe Mode and Normally Open (NO) for Active on.

Note

Relay

Name

Events that will trigger the alarm

Mode

Comment

ID

 

 

 

 

 

 

 

 

 

K1

Common Alarm

• Any of the functions below, except relays

Fail safe

Warning

 

 

K8, K9, K10, K11;

 

 

 

 

• Inverter section fault;

 

 

 

 

• Main PSU fault;

 

 

 

 

• System locked in operation mode;

 

 

 

 

• Internal memory fault;

 

 

 

 

• Internal communication fault.

 

 

 

 

 

 

 

K2

Battery voltage out of

• DC voltage is too high (shut down);

Fail safe

Warning

 

tolerance

• DC voltage is under warning level;

 

 

 

 

• DC voltage is low (shut down).

 

 

 

 

 

 

 

K3

Mains out of tolerance

• Mains voltage RMS value is out of

Fail safe

Warning

 

 

tolerance;

 

 

 

 

• Mains waveform not accepted (fast

 

 

 

 

detector);

 

 

 

 

• Mains frequency is out of tolerance.

 

 

 

 

 

 

 

K4

Bypass out of tolerance

• Bypass voltage RMS value is out of

Fail safe

Warning

 

 

tolerance;

 

 

 

 

• Bypass waveform not accepted (fast

 

 

 

 

detector);

 

 

 

 

• Bypass frequency is out of tolerance.

 

 

 

 

 

 

 

K5

Battery condition fault

• Battery monitor has detected a weak

Fail safe

Fault

 

 

battery;

 

 

 

 

• Battery monitor has detected a defective

 

 

 

 

battery.

 

 

 

 

 

 

 

K6

Battery disconnected

• Battery breaker tripped/open.

Fail safe

Fault

 

 

 

 

 

K7

System overload

• Output load exceeded 100%;

Fail safe

Fault

 

 

• Delta Inverter current limiter is active;

 

 

 

 

• Main Inverter current limiter is active.

 

 

 

 

 

 

 

K8

Output out of tolerance

• Output voltage RMS value is out of

Fail safe

Fault

 

 

tolerance;

 

 

 

 

• Output waveform not accepted (fast

 

 

 

 

detector);

 

 

 

 

• Output frequency is out of tolerance.

 

 

 

 

 

 

 

K9

Normal operation

• UPS is running in normal operation.

Active on

Opr. mode

 

 

 

 

 

K10

Battery operation

• UPS is running in battery operation.

Active on

Opr. mode

 

 

 

 

 

24

Symmetra MW 1000 kW 480 V Installation - 990-4112E

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American Power Conversion MW manual Relay Board functions, Relay Name Events that will trigger the alarm Mode Comment