AnsaldoSTS 95 - Power Supply Filtering and Regulation Test for Non-Battery Operation for 12 and 24 VDC Systems

General Maintenance and Troubleshooting
2-6 SM 6495, Rev. 7, December 2008
CAUTION
12 VDC Systems
The specified operating voltage for the Model 95 is 11 to 16 volts direct
current. This applies to both the motor supply (B12) and the Up Control.
Generally, this power will be supplied from batteries; however, it is
possible to use a power supply without batteries. (This can be done only
if battery backup is not required in the event of a power failure.) If used,
this power supply must be properly filtered and regulated. Otherwise,
equipment damage may occur. To check this, perform the test in Section
2.3.1.
CAUTION
24 VDC Systems
The specified operating voltage for the Model 95 is 21 to 28 volts direct
current. This applies to both the motor supply (B24) and the Up Control.
Generally, this power will be supplied from batteries; however, it is
possible to use a power supply without batteries. (This can be done only
if battery backup is not required in the event of a power failure.) If used,
this power supply must be properly filtered and regulated. Otherwise,
equipment damage may occur. To check this, perform the test in Section
2.3.1.
2.3.1. Power Supply Filtering and Regulation Test for Non-Battery Operation for
12 and 24 VDC Systems
1. Set a voltmeter on the VDC scale.
2. Place the voltmeter negative (black) lead on terminal 6B of the gate mechanism.
3. Place the voltmeter positive (red) lead on terminal 2C of the gate mechanism.
4. The voltage should read no more than 16 VDC on 12-volt systems and 28 VDC on 24-volt
systems.
5. Move the positive (red) lead of the voltmeter to terminal 1C.
6. The voltage should read no more than 16VDC on 12-volt systems and 28 VDC on 24-volt systems.