The SMART 3NC gas detectors provide a proportional 4-20mA output signal. By employing optional boards they can either communicate on a serial bus RS 485 or provide relay outputs.
In details, the available outputs are as follows:
- 4-20 mA. Proportional 4-20mA output current corresponding to the full range (LEL or ppm).
- Relay. By adding the STS3REL board, the unit is provided with 3 relays with voltage free changeover contacts. One relay is dedicated to the Fault and Watch-dog, while the remaining two relays can be associated to two out of the three available alarm thresholds.
- Serial RS485. By adding the STS.IDI interface, the detector can communicate on RS485 bus with SENTOX IDI and MULTISCAN++ gas control panels