N.O.
N.C.
C.O. Line or Analog
N.C. Relay Contact
N.O. Relay Contact
connect in parallel on the line.
IMPORTANT: Electronic devices are susceptible to lightning and power station electrical surges from both the AC
outlet and the telephone line. It is recommended that a surge protector be installed to protect against such surges.
2
** Note: The 12V DC adapter (model PS-2) supplied with the unit can power up to (4) RC-2A’s and a Viking model
PS-1A, 13.8V AC adapter, can be used to power up to (8) RC-2A’s. A PS-1A (13.8V AC adapter) may be purchased
separately. Go to www.vikingelectronics.com and click on “Spare Parts”.
Modes
IMPORTANT: Please read the following sections to determine which RC-2A mode works best for your application.
The RC-2A has two operational modes built in, called the Legacy and Alternative modes. The Legacy mode is
the standard mode of operation that has existed in all previous versions of the RC-2A. The Alternative mode is a
second mode of operation that increases the RC-2A's flexibility in some applications. The operational mode you
should use depends on the exact application for the RC-2A. Here are some general guidelines, but in some ap-
plications, the opposite mode may be needed (also see section B-C on page 3 describing the advantages and
disadvantages of each operational mode):
A. Choosing a Mode
Application Description Recommended Mode Additional Programming
* Use with a Viking W-1000, W-2000A, or
W-3000 handsfree doorbox.
Legacy Mode
(traditional software)
Set one code switch to D and set DIP
switch 5 to OFF.
Use with a Viking E-30 or 1600A Series
hands-free phone.
Alternative Mode
(new software)
Set at least one code switch to B, set DIP
switch 5 to ON and DIP switch 7 to OFF.
On a dedicated telephone line or PBX ex-
tension (no other phones on the same line
or extension).
Legacy Mode
(traditional software)
Set one code switch to C, set DIP switch 2
to ON and DIP switch 5 to OFF.
Wired across a telephone line in a residen-
tial application (sharing the line with other
phones), to control lights, door or gate.
Legacy Mode
(traditional software)
Set DIP switch 5 to OFF and do not set any
code switches to C or D.
* Caution: For increased security, Viking recommends using a Viking model SRC-1 or C-1000B Controller with
W-Series Doorboxes.
(12 pages)
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