4 And 8 Alarm Relay Cards - Honeywell X Series User Manual

The Minitrend QX and the eZtrend QXe recorders have only one slot available for digital
inputs and relay outputs for either a 4 or 8 channel Alarm Relay card or an 8 or 16 channel
Digital I/O card fitted in slot G, the position is identified on the rear panel. The 16 channel
Digital I/O card is not available on the eZtrend QXe recorders.
The Multitrend SX can have up to three Alarm Relay cards fitted in any combination of
Alarm Relay card or Digital I/O cards. The first Alarm Relay card or Digital I/O card is fitted
in slot G, any additional cards will locate in positions H and I.

4 and 8 Alarm Relay Cards

The 24-way connector for the
The pin-outs for 4 and 8 relay Alarm Relay cards are numbered from left to right and they
read as follows for each channel; NC (normally closed), C (common), NO (normally open).
Devices driven by the relays are connected via two 12-way screw terminal plugs.
The last two channels, 7&8, 23&24 or 39&40, can be used as digital inputs, connect across
Common (C) and Normally Open (NO).
A Form C dry contact relay is used for this type of card. The inputs are designed to accept
"Dry contact, no volt inputs". The relays should be used for non-inductive loads only where
a device requires a voltage to operate it, such as a 12 Volt buzzer, connect it to the normally
open (NO) contacts (unless the fail-safe setting is activated).
The maximum voltage which may be used with the alarm relays is 240V
43-TV-25-30 Iss.6 GLO Aug 07 UK
WARNING
HAZARDOUS VOLTAGES
Digital Input/Output card channels must not be connected to any hazardous live volt-
ages (no higher than 30V AC rms or 60V DC).
Alarm Relay Card channels
Alarm Relay Card channels can be connected to hazardous voltages up to 300V AC,
at Measurement Category CAT II (Overvoltage Category II)
Failure to comply with these instructions could result in death or serious injury.
NOTICE
For 12 and 16-way connectors; torque setting 0.4 Nm/3.5lb-in. Do not over tighten.
Recommended wire size for termination connector is 22-12 AWG (22-14 SWG)
CAUTION
IMPROPER MAINS SWITCHING
For 8 channel Alarm Relay cards.
Switching mains on the normally-open contact on channels 7 and 8 is not recommended,
as surges and spikes on the mains supply could cause damage to the input circuitry.
The normally-closed contact is unaffected, and can be used like all the other channels.
, connects to 3 A, 240 VAC SPCO relays.
Alarm Relay Card
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