Elentek SMART PRO - Expansion Input Modules; 7.1 RS485 Expansion; 7.2 Voltage-Free Contact Output Expansion; 7.3 Probe Input Expansion for Motor Start

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7. EXPANSION INPUTS
7.1 RS485 expansion
A(-) – B(+)
Module for RS485 communication standard with MODBUS protocol
7.2 Voltage-free contact output expansion
O1 – O6
Module for 6 digital outputs 300mA 35V max for the signalling of:
- O1: Motor 1 run
- O2: Motor 2 run
- O3: Overcurrent protection for motor 1
- O4: Overcurrent protection for motor 2
- O5: GA active alarm
- O6: Probe/G.MIN active alarm
7.3 Probe input expansion for motor start
C – S1 ÷ S4
PRO-SL input module:
- C – MIN – MAX (on main board): motor 1 start
- C (expansion): common
- S1 – S2 (expansion): probe for motor 2 start control
- S3 – S4 (expansion): probe for max. level signalling
7.4 Probe input expansion for water seepage into oil chamber
C – S4 ÷ S5
RL-H2O input module:
- C: common (to be connected to earthing potential)
- S4 (expansion): probe for motor 1 control
- S5 (expansion): probe for motor 2 control
7.5 Buffer battery device expansion
PRODBT module for connection of 6V 1,2Ah buffer battery for maintaining
control of alarm float and for signalling mains power supply failure