V6.230 20131017283.8 Optically Isolated InputsModels equipped with inputs contain up to two optically isolated inputs, IN1 andIN2. These inputs must be wetted from an external power supply between 38 and160 VDC or 38 to 120VAC. Connections are made through plug-in terminalblocks on the rear of the case as shown in figures 3.18a & b.. These opticallyisolated inputs may be used by the programmable logic to control or superviseany output. These inputs can also be used to communicate status informationfrom devices such as the liquid level alarm or sudden pressure over DNP3.0 orMODBUS. Any input can be programmed to be LEVEL or PULSE active. Theuse of shielded cable is recommended.Figure 3.18a: NEMA Input ConnectionsFigure 3.18b Panel Input Connections12POWER34AuxCTCOMTMPREFGROUNDSHIELDTB3TB2TB1BCOMTMPREFANALOG OUT+ -A1+ -A2ALARMNCOUT4C NO NCOUT3C NO NCOUT2C NO NCOUT1C NONCOUT5C NONCOUT6C NO TB1ACOMTMPREFA BRS485Rx TxGNDRptTxRx5671234IN1 IN2 TB4TB5+ -A3BUSYOK16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1CT1CT2CT3CT4CT5CT6CT7CT8TB6TB71234 TB3TB2Aux CT PowerTB1OUT5OUT6 OUT4 OUT2OUT3 OUT1TB1ATB5IN2IN1CT 1CT 2CT 3CT 4CT 5CT 6CT 7CT 82 1Probe 1 Probe 2 Alarm101112 789 56 4Probe 33IN 3IN 4IN 5IN 6IN 7IN 8TB7IN 9IN 10IN 11IN 12IN 13IN 14TB6
