by Simex

Multi counters module SLI-8 allows to counting of pulses delivered to 8 isolated binary inputs independently. All counters are 24 bit long and can be read and cleared by user at any time. 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).



8 binary; counters capacity: 4 294 967 295 (32 bits)

Current consumption

typ. 20 mA

Protection class

IP 20 (housing and connection clips)

Operating temperature

0°C ÷ +50°C (standard), -20°C ÷ +50°C (option)

Power supply

typ. 24V DC (16V DC ÷ 30V DC)

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

Storage temperature

-10°C ÷ +70°C or -20°C ÷ +70°C (with option 08)


max. 90%, non-condensing

Data memory

non-volatile memory, EEPROM type

Case dimensions

101 x 22,5 x 80 mm

External fuse

T - type, max. 1 A (required)

Transmission parameters

1200 ÷ 115200 bit/s.


on the 35 mm strip

Number of modules in 1 network

max. 128


Datasheet : SLI-8