LACROIX Sofrel S4W - S4 W Digital Input (DI) Configuration; Digital Input Technical Specs

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Case - Inputs/Outputs

Connection of DIs

Example for 2 DIs:

Technical specifications

- Number of digital inputs: 16

- Contact type:

Dry self-powered contact: Normally open/ closed

(configurable positioning logic)

- Maximum length of cable:

1,000 metres (AWG24 SYT+ cable type)

It is necessary to relay the digital inputs if the cable length is any higher

or if the cable crosses an environment with high interference.

- Digital input filtering:

Any steady state digital input can be used for the counter acquisition;

the minimum duration of the steady state is 2 ms (max frequency = 250 Hz)

- Isolation:

The DIs are isolated from the rest of the electronics; the isolation voltage

is 3000 V

DC minimum. The DIs are not isolated from each other.

Cable for

digital inputs

1 pair

for digital input no. 1

1 pair

for digital input no. 2

DI terminal strip:

Possible applications:

Pulse counters

Duration counters

Digital input loop: Normally closed

Digital input loop: Normally open

1 shared for 4 digital inputs