Sensitron STS3REL - Introduction; Technical Specifications

ENGLISH
Pag. 5
1. Introduction
The three-relay card (STS3REL) for SMART3/SMARTS gas detectors allows the detector to be
provided with tension free changeover contacts.
³ The rst output is to be associated to the Fault and Watch-dog alarm
³ The second output can be associated to the rst or second alarm threshold
³ The third output can be associated to the second or third alarm threshold.
The card comes complete with a at cable and connector to be easily plugged on the detec-
tor’s main board.
Note: when used with the SMARTS detector, the function of the relays can be modied by
the detector’s operating menu.
2. Technical specications
Contacts rating: 24 Vdc - 1A
Operation voltage: from 10,2 Vdc to 28 Vdc
Before connecting the relay card, please make sure the detector’s operation voltage is within
the values here above.