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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 (
, 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.
Содержание MX15
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Страница 25: ...6 Declaration of Conformity 21 Chapter 6 Declaration of Conformity...
Страница 26: ...7 Technical specifications 22...
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