93-346-80 Issue 4 © Copyright Protec Fire Detection PLC 2011
Control Loop Tx . Flashes red on transmit of a message onto the control loop
Control loop Rx. Flashes green on receipt of a message from the control loop
Outstation line 1 isolator state. Lit if isolator open
Outstation line 2 isolator state. Lit if isolator open
Route control loop tx on line 2. Lit green if true
Outstation loop Tx. Flashes red on transmit of a message onto the control loop
Outstation loop Rx. Flashes green on receipt of a message from the control loop
Route control loop tx on line 1. Lit green if true
Route control loop rx from line 1. Lit green if true
Route control loop rx from line 2. Lit green if true
Outstation line 2 isolated. Lit amber if isolated
Outstation line 1 isolated. Lit amber if isolated
Loop reboot. Lit when over-riding the over-current trip on powering up the loop
Fault On in normal, off in fault
Drive outstation loop from both sides. Lit if driving from both ends
Loop Fault. On when fault on outstation loop. either a full open circuit (not partial)
or short circuit
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