EW146691_en - rev. A
Gas Detectors
–
UR.21.P
02/04/2020
Gas detection systems for car parks and tunnels
6/8
Mechanical installation of
the optional Relay Card or
optional PhotoMos Cards
with
resistive
output
variation
On the main electronic card it is possible to insert, in a special connector named
CN1
, a
module having on board N. 4 relays with changeover contact that will be activated in
correspondence of the pre-alarm events, 1
st
alarm threshold, 2
nd
alarm threshold and faulty
sensor, and the relative LEDs signaling.
Follow the steps below to insert the card:
Phase 1:
Insert on the main electronic card the
card guide supplied with the card, taking
care to turn the elastic flag towards the
main terminal board.
Locate the connector CN1.
Phase 2:
Fully insert the card, taking
care to pull the elastic flag
of card guide towards the
terminal
board
of
the
optional card.
Phese 3:
Check the positioning of the card checking that all
pins are internal to the CN1 connector and that,
by practing a slight pull upwards, the card
remains in position due to correctly hooked and
held by the elastic flag of the card guide.
Phase 4:
Mark the box showing the
presence of the relay card
inside the device with a
permanent marker (example).
Card Guide
(with Elastic Flag)
Elastic Flag
CN1 Connector