6.2.4 MTL4523V/MTL4523VL - Solenoid Alarm driver
Single channel, voltage controlled with line-fault detection, IIC
With the MTL4523V or MTL4523VL interface, an on/off device in a hazardous area can
be controlled by a voltage signal in the safe area. It is suitable for driving loads such
as solenoids. Line fault detection (LFD), which operates irrespective of the output
state, is signalled by a safe-area solid-state switch which energises if a field line is
open or short–circuited.
The VL version has a lower current capability to suit alternative load requirements -
see datasheet.
Hazardous area Safe area
6
5
4
3
2
1
Solenoid, alarmor
other IS device
+
–
+
–
LFD
Vs–
Vs+
20 to 35V dc
Control
+
–
9
8
7
12
11
10
13
14
V
Terminal Function
1 Output –ve
2 Output +ve
7 Line fault signal +ve
8 Line fault signal –ve
10 Control +ve
11 Control –ve
13 Supply –ve
14 Supply +ve
Figure 6.16:
Top labels for
MTL4523V &
MTL4523VL