DRAFT - 26 March 2015
SM45-55-SAD Rev 3
11
10
b) Powered modules: MTLx523, 4523R, x523V, x523VL, x524, 4524S, 4525
Figure 2 Basic test arrangement - separately powered
During testing, the power supply, Vs - nominal 24.0V, min/max. range 20.0 to 35.0V - should be connected
between terminals 13 and 14 (+ve to terminal 14).
1
Connect a voltmeter between the + & – output terminals of the module, observing polarity.
2
Apply 24V between the supply terminals Vs+, Vs–.
3
Close the Control switch, or apply the 24V source for the MTLx523V/VL.
4
The voltmeter should now indicate a value between 22.2 and 24 volts.
5
Switch off the power to the module.
6
Connect an ammeter between the + & – output terminals of the module, observing polarity.
7
Close the Control switch, or apply the 24V source for the MTLx523V/VL.
8
The ammeter should indicate between 48mA and 60mA.
9
Switch off the power to the module.
Operate the test sequence and confirm expected operation of the module.
It is recommended that the results are recorded in a table such as that shown overleaf.
3. System - Normal operation test
Disconnect the test setup from the unit and connect the original system configuration. Make sure, as before, that
the tested unit is operating normally in the target system, without errors and in energised mode.
+
–
Control
i/p
o/p
V
A
+
–
24V
+
–
MTLx523V/VL
Vs-
Vs+
