Rev. 1 - 03/00
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Due to continuous product improvement, all colors, sizes, materials,
finishes and specifications are subject to change without notice.
In-Use Adaptor (SM400 Series)
The RY402 is an adaptor used to provide monitoring
(listening) in-use L.E.D. capabilities on up to three (3)
remotes in an SM400 intercom system. These monitor-
ing L.E.D.'s are required to comply with Federal and
Local 'privacy' laws, by letting people know when they
are being 'monitored' or 'listened to', with a remote
L.E.D. It is also used in elevator emergency intercom,
and other A.D.A. applications, to let a call know their
call for help has been acknowledged, even if they are
The RY402 is typically used with our model IR141P,
IR143P, OR54SS and OR541U remote stations, with
built-in privacy L.E.D, on the SM400 series intercom
system. One (1) RY402 is required for each three (3) or
less of these 'privacy' L.E.D. remotes.
Connections to the unit are made via a pigtail wiring
harness connector, which is supplied. The connector is
color-coded, with wiring designations on the unit's case.
• Easy installation
• Low-voltage operation
• Precision engineering
• Quick and easy plug-in replacement
Dimensions: Height: 5.50" (140mm)
Width: 3.75" (96mm)
Depth: 1.19" (31mm)
Construction: Attractive, flame retardant type
ABS plastic enclosure.
Connections: Wiring pigtail harness (supplied)
ARCHITECTS' AND ENGINEERS'
The in-use adaptor unit(s) shall be Alpha Communica-
tions®/Tektone RY402 or approved equal. It shall
provide 'privacy' L.E.D. outputs to compatible remote
stations in an SM400 Intercom System. It shall be used