INM 5500 Rev 11
38
6 .3 .2
MTL5532 - Pulse Isolator
Pulse & 4/20mA current outputs
The MTL5532 isolates pulses from a switch, proximity detector, current pulse transmitter
or voltage pulse transmitter located in a hazardous area. It is ideal for applications involving
high pulse rates and fast response times, by repeating the pulses into the safe area, and the
transistors used on the pulse output will ve or –ve polarity signals.
It may be used immediately in simple or legacy mode, or it may be software configured for more
specific applications - see next page for either option. With configuration, an analogue output
proportional to frequency is available, together with a relay output, which may act as an alarm.
Note
: For reliable, long-term operation the load on the output switching relay should not be less
than 50mW, e.g.10mA at 5VDC.
Hazardous area
Safe area
6
5
4
3
2
1
7
8
9
10
11
12
13
14
Vs–
Vs+
20 to 35V dc
3-wire
current
pulse
4/20
mA
–
+
3-wire
voltage
pulse
5
4
1
2-wire
current
pulse
Voltage
pulse
Current
pulse
5
1
Inhibit
Load
Alarm
4/20mA
Configuration
socket
–
+
1
4
+
Pulse
–
+
Pulse
4
3
V
4/20
mA
3
1
3
4/20
mA
Terminal
Function
1
Common input –ve
2
Switch/proximity input +ve
3
Current pulse input +ve
4
Transmitter ve
5
Voltage pulse input +ve
6
Inhibit input +ve
7
Alarm output
8
Current output –ve
9
Current ve
10
Alarm output
11
Pulse output –ve
12
Pulse ve
13
Supply –ve
14
ve
Vsp
SW1
SW2
3V
ON
ON
6V
ON
OFF
12V
OFF
OFF
OFF position
ON position
1 2 3 4
SW1
SW2
SW3
SW4
Vsp
Vsp
LFD
Mode
LFD
SW3
OFF
OFF
ON
ON
Switches located on the edge of the module define the mode of operation.
Figure 6 .18:
Top label
for MTL5532
