MTL MTL4500 Series, Инструкция по эксплуатации, Страница: 27 / 52

23
INM4500-2
Mar 2009
6.2.3 MTL4523/MTL4523R - Solenoid Alarm driver
With line fault detection, IIC
With the MTL4523 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
de-energises MTL4523, or energises an MTL4523R, if a fi eld line is open or short–circuited. Earth
fault detection can be provided by connecting an MTL4220 earth leakage detector to terminal 3.
Note : Signal plug HAZ1-3 is required for access to the earth leakage detector function.
Figure 6.11
LED indicators
for MTL4523
and MTL4523R
Hazardous area
1 2 3 4 5 6
7 8 9 10 1112 13 14
– +
Solenoid,
alarm or
other IS device
LFD*
To MTL earth leakage detector
+ –
*MTL4523R
phase reversed
Vs–
Vs+
+
Control
20–35V dc
–
Terminal Function
1 Output –ve
2 Output +ve
3 To earth leakage detector*
7 Line fault ve
8 Line fault signal –ve
10 Control +ve
11 Control –ve
13 Supply –ve
14 Supply +ve
Safe area
PWR
STS
LFD
MTL4523R
PWR
STS
LFD
MTL4523