RFC-1 Installation page 3.6
3.2.7 Telephone and Telephone Line Connection
The RFC-1 should be connected to a standard (POTS) telephone line with the modular (RJ11C) jack on the rear
panel labeled "Line". A telephone cable is supplied with the RFC-1 for this purpose. A telephone may be connected
to the jack labeled "Phone". This telephone will be used to control the RFC-1 locally (on-site) and will function
normally when the RFC-1 is not online.
Figure 3.6; RFC-1/B rear panel I/O connectors
3.2.8 Power Supply
Power to operate the RFC-1 and up to eight RP-8 panels is supplied by a 12 volt AC wall-plug transformer that is
supplied with the RFC-1. This transformer is designed for 120 volts AC at 50-60 Hz and is rated at 1 amp. The leads
of this transformer should be stripped and connected to the screw terminal connector marked “12 VAC” on the RP-8.
If more than one RP-8 is used, connect to any one of the RP-8 panels. If the supplied transformer has a connector
on the end of the power cord, simply cut the connector off and discard it.
Figure 3.7; RP-8 Power and I/O connections
In installations where 120 volts AC is not available, the RFC-1 may be powered by any source delivering 12.0 to 14.2
volts AC at 50-60 Hz or 16 to 18 volts DC. The RFC-1 draws a maximum of approximately 0.50 amps when a control
relay is engaged. A 12.6-volt filament transformer makes a good substitute power source. The power source must
be floating. Neither side of the power source should be connected to ground (earth) nor should the power source be
connected to any other equipment. Failure to observe this precaution will result in inaccurate telemetry indications.
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