National Communications
Page 15
POWERED 3RD PARTY
DEVICE CONNECTION
The relay output from
TLM
can also be used to advise an external 3rd
party electrical device that the telephone line has been cut or
disconnected.
The relay output from
TLM
is Dry Contact (Rated at 1A at 12V).
You can connect a power source AC or DC up to 12V and 1Amp to the
relay contacts if required.
In this situation 1 leg of the wires connecting to the
TLM
relay should
come from an external power source (not supplied).
A Connection Box with a short cable to connect it to
TLM
is provided
to allow for quick and easy connection of this power source.
The Connection Box screw terminals will then connect the power
source to one of the centre 2 pins of the 4P4C RJ socket of
TLM
.
When the
TLM
relay closes, power will then output through the other
centre pin of the 4P4C RJ socket of
TLM
to the remote electrical
device.
When the relay opens, this power flow will be removed.
See the diagram on page 14 for further detail.
Important Notes :
1) The Dry Contact Relay within TLM is rated at 12V and 1Amp.
If you exceed either of these parameters, permanent damage
will result.
2) Do NOT use the 12V power adaptor supplied with TLM as a
power source for the connection box or 3rd part accessory.
Doing so can cause TLM to not function correctly due to power
‘brown out’.
