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Electrical Installation: Relay Board (Optional)
24 Symmetra MW 800 kW 3 × 400/230 V Installation - 990-1510D
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.
Note
Use Normally Closed (NC) contacts for Fail safe Mode and Normally Open (NO) for
Active on.
Relay
ID
Name Events that will trigger the alarm Mode Comment
K1 Common Alarm • Any of the functions below, except relays
K8, K9, K10, K11;
• Inverter section fault;
• Main PSU fault;
• System locked in operation mode;
• Internal memory fault;
• Internal communication fault.
Fail safe Warning
K2 Battery voltage out of
tolerance
• DC voltage is too high (shut down);
• DC voltage is under warning level;
• DC voltage is low (shut down).
Fail safe Warning
K3 Mains out of tolerance • Mains voltage RMS value is out of
tolerance;
• Mains waveform not accepted (fast
detector);
• Mains frequency is out of tolerance.
Fail safe Warning
K4 Bypass out of tolerance • Bypass voltage RMS value is out of
tolerance;
• Bypass waveform not accepted (fast
detector);
• Bypass frequency is out of tolerance.
Fail safe Warning
K5 Battery condition fault • Battery monitor has detected a weak
battery;
• Battery monitor has detected a defective
battery.
Fail safe Fault
K6 Battery disconnected • Battery breaker tripped/open. Fail safe Fault
K7 System overload • Output load exceeded 100%;
• Delta Inverter current limiter is active;
• Main Inverter current limiter is active.
Fail safe Fault
K8 Output out of tolerance • Output voltage RMS value is out of
tolerance;
• Output waveform not accepted (fast
detector);
• Output frequency is out of tolerance.
Fail safe Fault
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