Simex SLI-8 8 Counter Modbus RTU module

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  • Weight
    0.15 kg
  • SKU

Simex SLI-8 allows to counting of pulses delivered to 8 isolated binary inputs independently.  Also features Modbus RS485 communications.

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Multi counters module SLI-8 allows the counting of pulses delivered to 8 isolated binary inputs independently. All counters are 32 bit long and can be read and cleared by user at any time. The counters are non-volatile and are retained in event of power failure. Occurrence of HIGH state on particular input is signalled by green LEDs marked IN1 to IN8. Incrementation of counter occurs after falling edge on particular input (input state changes from HIGH to LOW). It is essential that pulses have fulfill some time restrictions. These restrictions depend on settings of implemented internal digital filter, which allows to eliminate signal oscillations corresponding to contacts bouncing (of mechanical sensors).


  • Multi Counters module
  • 8 independent voltage inputs
  • RS-485 / Modbus RTU
  • LED indicators for communication and status.


  • Inputs: 8 binary counters capacity: 4 294 967 295 (32 bits)
  • Power supply: typ. 24V DC (16V DC to 30V DC)
  • Current consumption: typ. 20 mA
  • Operating temperature: 0°C to +50°C (standard), -20°C to +50°C (option)
  • Protection class: IP 20 (housing and connection clips)
  • Input levels: LOW state: 0V; HIGH state: 24V (min. 8V)
  • Communication interface: RS-485 / Modbus RTU
  • Breakdown voltage: all 8 inputs are galvanically isolated from module supply and RS-485 interface
  • Data memory: non-volatile memory, EEPROM type
  • Humidity: max. 90%, non-condensing
  • Storage temperature: -10°C to +70°C or -20°C to +70°C (with option 08)
  • Case dimensions: 101 x 22,5 x 80 mm
  • Mounting: on the 35 mm strip
  • External fuse: T - type, max. 1 A (required)
  • Number of modules in 1 network     max.: 128.
  • Manufacturer PartNo. SLI-8

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