Oldham MX15, Инструкция по установке и эксплуатации, Страница: 13 / 32

3
– Installation and wiring
9
4/20 mA 2 active wire sensors/transmitters
■ C1 : signal (return to ground).
■ C2 : not connected
■ C3 : power supply (+24 Volts).
4/20 mA 3 active wire sensors/transmitters
■ C1 : signal (return to ground).
■ C2 : power supply (0 Volts).
■ C3 : power 24 Volts.
Note
■ Each type of sensor has a different programming circuit (Explo 340 mA or
4-20 mA) installed during manufacturing (Figure 2, ref. A).
■ Each line may be connected to a maximum of 5 OLCT 10 toxic gas
sensors. In this case, circuit programming must be (Figure 2, ref. A)
completed by trained staff.
Alarm relays
The MX 15 controller uses two alarm relays which correspond to two instant
pre-programmed alarm thresholds.
The relays are energized, or with a powered coil with no gas alarm activated
(negative security available on request) and voltage-free.
REL1 terminals
correspond to the REL1 relay contacts (alarm 1). REL2 terminals correspond
to the REL2 relay contacts (alarm 2).
The relay contacts can be used "normally open" (NO) or "normally closed"
(NC) by flipping the corresponding switch (Figure 2, ref. M or R).
Refer to the wiring examples on pages 10 to 12.
Relay fault
The fault relay is energized and voltage-free. Terminals marked DEF
correspond to fault relay contacts (trouble).
The relay contact can be used "normally open" (NO) or "normally closed" (NC)
by flipping the corresponding switch (Figure 2, ref. L).
Refer to the wiring examples on pages 10 to 12.
Remote acknowledgment
A remote acknowledgment button can be connected to the MX 15 controller at
the terminals marked Acknowledgment ( Figure 2 , ref. G) (dry, voltage-free
contacts) at a maximum distance of 2 meters.
Refer to the wiring examples on pages 10 to 12.
Wiring examples
The following pages contain examples of wiring.