
Product Specification Sheet APS116 - Rev. 07/2013
PM321B / PM322B Multiplex Lamp Control ModulesPM321B / PM322B Multiplex Lamp Control Modules
Alpha CommunicationsAlpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-559942 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
TOLL-FREE: (800) 666-4800 • Web: AlphaCommunications.com • Email: info@alphacommunications.comTOLL-FREE: (800) 666-4800 • Web: AlphaCommunications.com • Email: info@alphacommunications.com
Copyright © 1998-2 016 Alpha Communication s® - All Righ ts Reserved.
Due to c ontinuo us product i mprovement, all col ors, sizes, materials, finishes and sp ecifications are subject to change witho ut not ice.
Model PM321B
Model PM322B
FeaturesFeatures
Provides ON/OFF control of up to two lamp sources 
Solid state multiplex circuits 
Simplified multiplex wiring using plug-in type connect ors 
Lamp cont rol, TV cont rol and nurse c alling from
SF401DIG Pillow Speaker
Supports standard SF41P series Pillow Speaker and
SF401A Call Cords
Mounts direct ly to IR319B (single) and/or IR320B (dual) 
Patient Stations
SpecificationsSpecifications
Dimensions:
Height: 0.50" (13mm) Width: 5.00" 
(127mm) Depth: 1.78" (46mm)
Construction: PC board with quality electronic components
Mounting:
Plug-in connec tors mounted to IR319B/IR320B 
Patient Stations
Connections: Plug-in type
Wiring: Multiplex
PM321/PM322B Multiplex Lamp Control ModulesPM321/PM322B Multiplex Lamp Control Modules
The PM321B and PM322B multiplex lamp c ontrol modules are for 
use with NC300II series nurse call system patient stat ions IR319B 
and IR320B, and the SF401DIG pillow speaker. The modules provide 
for ON/OFF control of t wo lamp sources through the pillow 
speaker. Lamp sources are typically the overhead room lamp and 
a separate reading lamp. Circuitry for low-voltage switc hing of t he 
lamps is t o be provided by others.
Turning the lamps on or off is accomplished by pressing the 
appropriate switc hes on t he c orresponding pillow speakers. The 
lamp c ontrol modules can also be direct ly mounted to stat ions 
equipped with PM311C or PM312C pillow speaker interc om modules.
If desired, standard SF41 series pillow speaker or SF401A call 
cords may be used without removal of the PM321B and/or PM322B 
modules.
Architects' And Engineers' SpecificationsArchitects' And Engineers' Specifications
The multiplex Lamp Control Module(s) shall be 
Alpha Communications® / TekTone Model PM321B, PM322B 
or approved equal. The PM321B module(s) shall be designed for 
use with NC300II series IR319B patient st ation; t he PM322B shall 
be designed for use with NC300II series IR320B patient st ation.
When used in conjunction with t he appropriate 
Alpha Communications® pillow speaker, PM321B and
PM322B modules shall provide for on/off control of two
lamp sources, generally one room lamp and one reading lamp. Lamp 
control modules may also be used in c onjunction with Alpha 
Communic at ions® / TekTone model PM311C or PM312C pillow 
speaker intercom modules.
All electronic components necessary for this function shall be 
mounted on a print ed c ircuit board which shall be mounted to the
IR319B or IR320B station. For stations equipped with PM311C or 
PM312C modules, the PM321B or PM322B shall be mounted t o
those modules.