26 43-TV-25-30 Iss.6 GLO Aug 07 UK
Alarm Relay Channel Numbers
The Alarm Relay cards are either 4 or 8 channels with a full length connector taking up 8
channels even though the cards only operate on 4 channels or 8 channels. The 8 channels
Alarm Relay card has 2 digital inputs available on the last 2 channels. There are no Digital
Inputs available on the 4 channels Alarm Relay card.
8 and 16 Digital Input/Output Card
The 16 channel Digital I/O card is not available on the eZtrend QXe recorders.
The
Digital Input/Output Card has 1A 24V DC rated relays that are connected via two 16-
way connectors, the left connector for the first 8 channels and right connector for the second
8 channels. The pin-outs for 8 and 16 I/O cards are labelled from left to right, 1 to 16 on the
left side and 17 to 32 on the right. Each channel can be set up as an input or an output. For
output the relay is normally open type.
A Form A dry contacts relay is used for this type of card. The inputs are designed to accept
“Dry contact, no volt inputs”.
Table 2.6 :
Alarm Relay card 4 channel Alarm Relay card 8 channel
Card
position
Channel
number
Digital
Inputs
Card
position
Channel
number
Digital
Inputs
Slot G 1 to 4 N/A Slot G 1 to 8 7 & 8
Slot H 17 to 20 N/A Slot H 17 to 24 23 & 24
Slot I 33 to 36 N/A Slot I 33 to 40 39 & 40
Figure 2.10 Alarm Relay Card connector details
NC C NO NC C NO NC C NO NC C NO NC C NO NC C NO NC C NO NC C NO
Relay contacts position
Channels 7 and 8 can
be set as Digital Inputs.
(Use C and NO)
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8
NC = Normally Closed
C = Common
NO = Normally Open
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