Relay board 1 connections
Relay | Function | Mode | Special | Comments |
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Output 1 | Common alarm | Fail safe |
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Output 2 | Normal operation | Active on |
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Output 3 | Bypass operation | Active on |
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Output 4 | Battery operation | Active on |
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Output 5 | VDC out of tolerance | Fail safe |
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Output 6 | Battery conditon fault | Fail safe |
| Battery fault detected by |
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| battery monitor |
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Output 7 | Maintenance bypass | Active on |
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| operation |
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Output 8 | Mains out of tolerance | Fail safe |
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Output 9 | Bypass out of tolerance | Fail safe |
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Output 10 | Output out of tolerance | Fail safe |
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Output 11 | MCCB open | Fail safe |
| Battery breakers open |
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Output 12 | System overload | Fail safe |
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Output 13 | Good utility | Active on |
| If UPS goes into bypass, |
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| this relay goes on without |
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| delay |
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Output 14 | Boost charge active | Fail safe |
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Output 15 | Fan fault | Fail safe |
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Output 16 | Temperature fault | Fail safe |
| Temperature switch active |
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| or faulty temperature sensor |
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Input 1 | Generator active |
| Master will handle | Input for indicating that a |
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| signal | generator is active. This will |
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| be used to reduce the charge |
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| power |
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Input 2 | Battery room ventilation |
| Individual | Input for indicating that the |
| fault |
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| ventilation in battery rooms |
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| is defect. This will be used |
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| to reduce the charge power |
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Input 3 | DC Ground Fault |
| Individual |
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| Detection |
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Input 4 | Reserved for future use |
| Master will handle |
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| signal |
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Input 5 | Plant clock |
| Master will handle | Input for real time clock |
| synchronization |
| signal | synchronization |
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Input 6 | Power Tie detection |
| Master will handle | Input from PLC to detect if |
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| signal | Power Tie is active |
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14 | Symmetra MW II 1200 kW 3 x 400/230 V Installation - |