RDL STIC1 Data Sheet

STICK-ON® SERIES

Model ST-IC1
Intercom Amplifier

ANYWHERE YOU NEED...

• Intercom Electronics

• Intercom with Push-to-Talk

• Mic or Speaker Input

• 8 Ω or 45 Ω Speakers

• Bi-Directional Communication Option

You Need The ST-IC1!

The ST-IC1 is part of the group of versatile STICK-ON products from Radio Design Labs. STICK-ONs
feature the advanced circuitry for which RDL products are known, combined with unequaled versatility in
mounting possibilities. The durable adhesives provided with the ST-IC1 permit permanent or removable
mounting. Numerous available mounting accessories, brackets and rack-mount chassis are optionally
available to facilitate any system design.

APPLICATION: The ST-IC1 is the ideal choice where an intercom system is to be installed, or where an
amplifier is needed to bring a mic level up to a 1 W speaker level, with optional muting capability.

The ST-IC1 has one input, one output, and two muting control terminals.
The input accepts a dynamic mic, a condenser mic (a phantom supply input terminal is provided to power

condenser mics), an 8 Ω speaker or a 45 Ω speaker. The gain range of the module is sufficient to
accommodate this wide variety of source levels.

The output is ground-referenced, and drives more than 1 watt RMS into an 8 Ω load. The output circuit
can be connected to any load impedance of 4 Ω or greater.

When no connections are made to either MUTE terminal, the module output is active. If the MUTE -
terminal is pulled to ground (using a switch, an open-collector transistor, or the slave terminal of another
RDL module), the ST-IC1 output will mute. Pulling the MUTE + terminal high (+15 Vdc) has the same
effect. In a bi-directional intercom, the MUTE - terminal of the master module is connected to the MUTE +
terminal of a secondary module, thereby muting the secondary module. When the master module’s
MUTE-- terminal is pulled to ground, the master modules mutes and the secondary module becomes
active. There is an internal 15 ms time delay between the two operations which is fast enough to have no
audible effect on voice communication, but prevents any feedback effects during switching.

Wherever an intercom is needed, the ST-IC1 is the ideal choice. Use the ST-IC1 combined with other RDL
RACK-UP®, STICK-ON®, TX™, or FLAT-PAK™ series products as part of a complete audio/video system.

RDL •• P.O. Box 1286 •• Carpinteria, CA., USA 93014 •• [phone] •• FAX [phone] •• http://www.rdlnet.com

Radio Design Labs Technical Support Centers

STICK-ON® SERIES

Model ST-IC1
Intercom Amplifier

INTERCOM USING SINGLE REMOTE SPEAKER

INTERCOM AMPLIFIER

MIC/SPKR IN 1 WATT RMS OUT

INPUT

MASTER
LOCATION

INTERCOM AMPLIFIER

MIC/SPKR IN 1 WATT RMS OUT

INPUT

INPUT

24VDC

OUTPUT

MUTEPHNTM

24VDC

OUTPUT

MUTEPHNTM

INTERCOM AMPLIFIER

MIC/SPKR IN 1 WATT RMS OUT

24VDC

MUTEPHNTM

GAIN

GAIN

OUTPUT

ALL 3 MODULES MAY
RUN FROM A SINGLE
GROUND-REFERENCED
POWER SUPPLY

GAIN

Installation/Operation

LOGIC CONTROLLED RELAY

ACTUATE

S

PWR

L

24 5

A

V V

V
E

BOTH MODULES MAY
RUN FROM A SINGLE
GROUND-REFERENCED
POWER SUPPLY

EN55103-1 E1-E5; EN55103-2 E1-E4

Typical Performance reflects product at publication time
exclusive of EMC data, if any, supplied with product.
Specifications are subject to change without notice.

MOMENTARY ACTUATION

SHOWN DE-ENERGISED

SECONDARY
LOCATION

MASTER
LOCATION

INTERCOM AMPLIFIER

MIC/SPKR IN 1 WATT RMS OUT

INPUT

24VDC

OUTPUT

MUTEPHNTM

GAIN

SECONDARY
LOCATION

INTERCOM USING SEPARATE MICS AND SPEAKERS

TYPICAL PERFORMANCE

Frequency Response: 300 Hz to 4 kHz (+/- 2 dB, filtered for voice-band intelligibility)
Gain Range: OFF to 70 dB (adjustable)
Input level required to produce 1 W RMS: -60 dBu (8 Ω source); -55 dBu (600 Ω source)
THD+N: <1% @ 1 kHz, referred to 1 W @ 50 dB gain
Residual Noise (unmuted output below 1 W): <75 dB @ 60 dB gain setting
Operating Output Power: 1 W RMS
Maximum Output Power (before clipping): 1.5 W RMS
Mute Attenuation: >115 dB @ 1 kHz
Muting Switching Type: Solid State - no relay contacts used
Mute Release Delay: 15 ms
Power Requirement: 24 to 33 Vdc @ 175 mA, Ground referenced

U.S.A. [phone], [phone]; Fax: [phone]

Europe [NH Amsterdam] (++31) 20-6238 983; Fax: (++31) 20-6225-287

891-0131I