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TVP Manual (full) March 2007 CE rev 03.doc
2.12 Connecting the remote interface
TVP units are supplied with a fully isolated remote interface suggested wiring schemes are
proposed in section 4. Using the connector supplied will automatically force the TVP into
remote mode. Removal of the connector the unit will switch to “Local” (manual) mode
Diagram 16. The remote interface connector showing pin numbering (connector end)
A TVP only requires a simple contact closure to effect a change in state, likewise any change in
state is indicated by a relay closure at the TVP. Where the vacuum system provides voltage
signals these must be isolated from the TVP by a relay. A range of adapters for common
interface patterns are available directly from Telemark
CAUTION
Always isolate the TVP from the power supply when carrying out service work with the remote
connected.
The TVP provides a 2 AMP 24VAC supply to power relays and to provide signalling to your
vacuum systems – See section 4 for suggested wiring schemes.
CAUTION
The TVP cannot accept external voltage inputs of any kind as they can lead to spurious system
measurements.
CAUTION
Do not short circuit the 24 V AC supply (pins 35 & 36) against any pin designated as ground
(GND) as this may damage the low voltage circuitry.
The system is protected by a manual re-settable 2-Amp thermal fuse located on the right hand
side of the remote connector. Ensure that there is sufficient resistance (>32Ω) in the external
circuit to prevent this value being exceeded.
NOTE
Ground is not earth on the TVP.
A mating male half and pins are supplied. The correct insertion/extraction tool (supplied) must
be used when making up the remote interface connection. If there is no voltage signal back
from the unit, try re-setting the fuse first.
The TVP remote has the following hierarchy for relay closures.
Cool
Defrost
Start / Standby (systems operate)
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