ENMET ENG – 97D STAND-ALONE - Manual (Page 7)

ENG-97D S TAND -A LONE ENMET Corporation
5
3.2 Wiring Control
The C ONTROL is supplied with a 110 V AC line cord. This may be detached and discarded if it is desired to run conduit to the
instrument. In this case, supply an appropriate sealed conduit fitting, and supply 85-265 V AC power to the correct positions on
the terminal strip located on the power supply circuit board. See Figure 4 and Table 1.
The outputs are also available on the terminal strip. For the 4-20mA loop output, use shielded cable and the sealed fitting
supplied, or conduit and an appropriate fitting, for the output wires.
N OTE : The output fitting is supplied with a short length of cable in it, to assure that the enclosure remains sealed if the fitting is
retained but not used.
A jumper on the power supply board is used to select the alarm level that activates the horn and relay; see Figure 4 and Table 1.
Figure 4: ENG-97D S TAND -A LONE Power Supply Circuit Board
W ARNING : Continuous gas detection and alarm systems (110 V AC /220 V AC / 24 V DC / 12 V DC powered) become inoperative upon
loss of primary power. Contact factory for specifications and pricing of backup battery systems.
Auxiliary alarms should be powered from an independent power source separate form the instrument power to avoid alarm
failure due to controller malfunction.
Table 1: ENG-97D S TAND -A LONE Terminal Connections
Connection Terminal position
AC Input 85 – 265 V AC , 50 – 60 Hz
AC Line (High): J3 Positions 12 & 13, in parallel
AC Neutral: J3 Position 14
AC Ground: J3 Position 15
Relay contacts J3 Positions 1 – 3
4-20mA Output J3 Positions 6 – 7
•
6 is ground
•
7 is 4-20mA output
Horn & Relay Jumper J4, top to bottom (gray block indicates jumper position)
Jumper location:
Low alarm Mid alarm High alarm
Terminal J4
Horn & Relay Jumper
Terminal J3
Terminal J3,
Positions 12 – 15
for AC input