25 Safety Bus Manual — P/N LS10177-000HI-E:B 02/21/2019System Components SB-SIM/GM Module3.3.2 Visual IndicatorsThe front panel of the module feature 19 LEDs that indicate the following conditions:3.3.3 ConnectionsThe SB-SIM/GM module features the following connectors:Terminal Block TB1This terminal block supplies power to the module.Terminal Block TB2This terminal block connects the two ring communication links.Tag Color M Mode ConditionRUN Green O On Solid Normal operationOff Module failure or no powerLK1-Fault+Leakage YellowO Off Communication on Link LK1 presentBlinking Link LK1 towards board interruptedOn Solid Communication failure on Link LK1Pulsing on/off Positive earth leakageLK2-Fault-Leakage YellowO Off Communication on Link LK2 presentBlinking Link LK1 towards board interruptedOn Solid Communication failure on Link LK2Pulsing on/off Negative earth leakageL1-L8 RedO Off Channel in normal stateBlinking Channel in pre-alarmOn Solid Channel in alarmL1-L8 YellowO Off Channel in normal stateBlinking Channel fault (module or line)On Solid Channel disabledNOTE: During the startup sequence, the yellow and red LEDs blink 3 times, then the seven redLEDs L1-L7 will go on for 2 seconds to indicate the module address in binary format (L1=1, L2=2,L3=4, L4=8, L5=16, L6=32, L7=64). At this point, the eight yellow LEDs L1-L8 will begin to blinkrapidly until the module is configured by the panel.Pin Tag Function1 +V 24VDC Power supply positive2 +V 24VDC Power supply positive3 -V 24VDC Power supply negative4 -V 24VDC Power supply negativePin Tag Function1 -LK1 Link-1 Negative2 +LK1 Link-1 Positive3 SLK1 Link-1 Screen4 -LK2 Link-2 Negative5 +LK2 Link-2 Positive6 SLK2 Link-2 Screen