GPS Grandmaster Clock
14
RT430-TM-EN-5
Watchdog (self-monitoring) contacts are provided to indicate the health of the device on some
products. We strongly recommend that the user hard wire these contacts into the substation's
automation system, for alarm purposes.
Earth the equipment with the supplied PCT (Protective Conductor Terminal).
Do not remove the PCT.
The PCT is sometimes used to terminate cable screens. Always check the PCT’s integrity after
adding or removing such earth connections.
The user is responsible for ensuring the integrity of any protective conductor connections
before carrying out any other actions.
The PCT connection must have low-inductance and be as short as possible. For best EMC
performance, ground the unit using a 10 mm (0.4 inch) wide braided grounding strap.
All connections to the equipment must have a defined potential. Connections that are pre-
wired, but not used, should be earthed, or connected to a common grouped potential.
Pay extra attention to diagrams before wiring the equipment. Always be sure that the
connections are correct before energizing the circuits.
4.5 Pre-energisation Checklist
Check voltage rating/polarity (rating label/equipment documentation).
Check protective fuse or miniature circuit breaker (MCB) rating.
Check integrity of the PCT connection.
Check voltage and current rating of external wiring, ensuring it is appropriate for the
application.
4.6 Peripheral Circuitry
