A black terminal block is provided at the lower left corner inside the
enclosure. The connections on the terminal block are labeled
L N G
.
Connect the external AC power to this terminal.
If the unit is powered by DC, connect 24 VDC supply to the 2 pin green
terminal labeled
DC power input
on the termination board.
Refer to figure 3 for the location of AC and DC terminals
Connecting Sensors to the Monitor
Three (3) pin screw type terminals are provided on the termination board
for remote sensor connection. The terminals are labeled as SENSOR and
each pin is identified as +,
-
, & E for sensor DC supply, ground, and
input signal respectively. The DC is supplied to the sensor by the control
module. The supply is fused through a 2 amp miniature fuse on the
control module.
Each remote sensor should be connected by a 3 conductor shielded cable.
See figure 4 for remote sensor connection.
Alarm Wiring
Figure 4 shows a typical wiring diagram for connecting alarm devices to
relay contacts on the main connection board. Note that contacts are dry or
potential free contacts. Refer to the wiring details provided by the
manufacturer of alarm devices.
Below each control module on the main connection board there is a 2-pin
jumper selection to select the module type as H2S or LEL. Install the
jumper properly as this will enable the control module to activate the Low
alarm relay for either Toxic (H2S) or combustible (LEL)
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