A1557 Field Terminal List [Listed along the top edge of the PCB from left to right]
Terminal Ident. | Function | Terminal Ident. | Function |
| |||
Aux Fire | NO 1 | Fire | relay normally open 1 | Alarm 1 | + | Sounder circuit 1 + [Active polarity] | |
| NC1 | Fire | relay normally closed 1 |
| - | Sounder circuit 1 - | [Active polarity] |
| P1 | Fire | relay pole 1 | Alarm 2 | + | Sounder circuit 2 + [Active polarity] | |
| NO 2 | Fire | relay normally open 2 |
| - | Sounder circuit 2 - | [Active polarity] |
| NC2 | Fire relay normally closed 2 | Network | NO + | Panel network out + | ||
| P2 | Fire | relay pole 2 |
| NO- | Panel network out - |
|
Aux Flt | P | Fault relay pole |
| NI + | Panel network in + |
| |
| NO | Fault relay normally open |
| NI - | Panel network in - |
| |
| NC | Fault relay normally closed | Loop 1 | LO+ | Loop 1 out + |
| |
Aux | 24V | Aux DC supply [24V] |
| LO- | Loop 1 out - |
| |
| 0V | Aux DC supply [0V] |
| LI+ | Loop 1 in + |
| |
I/O | MX+ | Local I/O expansion port + |
| LI- | Loop 1 in - |
| |
| MX- | Local I/O expansion port - | Loop 2 | LO+ | Loop 2 out + |
| |
Repeater | RO + | Repeater out + |
| LO- | Loop 2 out - |
| |
| RO - | Repeater out - |
| LI+ | Loop 2 in + |
| |
| RI + | Repeater in + |
| LI- | Loop 2 in - |
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| RO - | Repeater in - |
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Remote | SAL | Silence alarms |
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Inputs | RST | Reset |
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| EVC | Evacuate |
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| SBZ | Silence buzzer |
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| COV | Class change alarm |
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| FLT | Fault |
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1.1.6Power Supply Illustration
+ | + |
12V | 12V |
Document Ref: Nex8inst.doc/Rev0 09.07.00 | Page 5 of 30 | Originator MC Checked by AC__ |