Libertas bell control hookup

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• Libertas master clock controller
• Single output bell controller hookup (PDF download)
• Three output bell controller hookup (PDF download)
• Four output bell controller hookup (PDF download)
• Relay panel for up to 16 bells

Relay panel technical information

Lights and test buttons

At the top of the relay panel is a square board with three buttons with four lights at the top edge.

The four lights are labeled:

Power - Data - Fault - Status

The buttons may be labeled:

Reset - Test - Step

At the bottom of this board sometimes installed on an auxiliary board attached with a ribbon cable are 1 inch square output modules mounted vertically (four outputs on the main board, twelve outputs on the auxiliary board). For tolling outputs, there will be two timer adjustment controls. For motorized ringers there will not be adjustments. At the top of these boards is a green light that indicates the output is on. At the bottom of the board is a red light that indicates the output is driving a short circuit.

Test mode

Hold the Test button (under the Data light) while momentarily clicking the Reset button (under the Power light). After the Fault light blinks you can let go of the Test button. The Data light should remain lit to indicate the panel is in the self-test mode.

Press the Step button to sequence through the outputs. The tolling outputs will ring first then any motorized outputs will follow. Note that after ringing the Motorized outputs, the toll outputs will may locked out (hammer protect mode). If you need to test the tollers again, repeat the procedure above to reset the test mode (after the bells have ceased to swing).

To repeat an output that you have stepped to, press the Test button to repeat it. This is useful for testing motorized outputs that time out after a second or so.

Exit test mode

The panel will reset to the standby mode in a couple of minutes. For immediate reset, press the Reset button so that the Data light goes out.

Pulse Adjustments

Each timer board has two adjustment potentiometers. The top adjustment sets the length of the pulse and the bottom adjustment sets the maximum repeat rate. For both cases, clockwise adjustments shorten the pulse and allows smaller bells to repeat faster.

If the lower potentiometer is adjusted counter clockwise more than the upper adjustment, the ON pulse will be shortened to allow faster repeats.

Pulse setting procedure for large tolling bells

1. Set the top adjustment fully clockwise
2. Set the bottom adjustment fully counter-clockwise
3. Turn top adjustment counterclockwise until the ringing does not get any louder

Pulse setting procedure for small chime/carillon bells

1. Set both adjustments fully clockwise (short pulse)
2. Turn top adjustment counterclockwise until the ringing does not get any louder
3. If the top adjustment is fully counterclockwise and you can get the bell to ring louder by turning the bottom adjustment farther then continue adjusting the bottom adjustment until the desired performance is obtained.

Troubleshooting

Fuse blows

Test Open Output

Disconnect output wires from PCB for the bell that blows fuse. If fuse still blows without anything connected, the rectifier is probably at fault. Most panels have socketed rectifiers that can be replaced. Be sure to align the angled corner (positive lead) correctly when inserting the replacement.

Test Alternate Output

If the output in question does not blow the fuse when its output is not connected, try connecting the bell to another output (lower numbered output for high current fuse). If the other output fuse blows there is a problem with the striker or wiring.