ENGLISH
Pag. 3
1. Introduction
The 1 relay card (STS1REL) for the SMART3 series gas detectors allows the detector to be
provided with 1 voltage free changeover contact.
2. Technical specifications and layout
Contact rating: 50 mA at 24 Vdc; 100 mA at 12 Vdc
Figure 1) Layout of the STS1REL card
3. Assembly
Before inserting the STS1REL card, be sure the detector has been powered off. Insert the
vertical plug-in card into the 10-pole connector, paying attention to leave the two left side
poles free. Make sure the card has been fully plugged in.
Turn the side comprising the red LED towards the main terminal board, as shown in figure 2.
for the SMART3G’s series, in order to properly activate the STS1REL relay card it is manda-
tory to open the jumper JP5-6 on the detector’s main PCB (refer to the SMART3G’s detector
manual).
IMPORTANT!
CCLLOOSSEEDD:: NNOORRM
MAALLLLYY EENNEERRGGIIZZEEDD RREELLAAYY ((DDEEFFAAUULLTT))
OOPPEENN:: NNOORRM
MAALLLLYY DDEE--EENNEERRGGIIZZEEDD RREELLAAYY
Jp4
Relay
Jp4
NNOORRM
MAALLLLYY OOPPEENN ((NNOO)) CCOONNTTAACCTT IIFF JJUUM
MPPEERR BBEETTW
WEEEENN
11
AANNDD
22
NNOORRM
MAALLLLYY CCLLOOSSEEDD ((NNCC)) CCOONNTTAACCTT IIFF JJUUM
MPPEERR BBEETTW
WEEEENN 22 AANNDD 33 ((DDEEFFAAUULLTT))
Jp3
1
2
3
Jp3
LED: LIT WHEN THE RELAY IS ENERGIZED
1
2
3
1
2
3
