Oldham MX 32, Installation And Operating Manual

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3
– Installation and wiring
11
Figure 8: MX 32 controller with 1 explosive sensor on Channel 1 and dual explosive
sensors on Channel 2.
Grounding sector
0V DC
+24 V DC
Telephonic
transmitter
To the
telephone line
Gas valve, closed when
power is cut off*
Shared fault indicator
Fuse or
circuit breaker
Fuse
Contact alarm
Channel 2.
Contact alarm
Channel 1.
The AL1 and AL2 relays can be programmed as
energized or de-energized (factory settings).
The fault relays are energized.
The contact relays are available on the NO or
NC terminals according to the position of the
switch next to each relay.
*Capacity to cut the power to relays 120 VA-
30W resistive; use a relay with external power
source if necessary.