User Instructions
Model PS-4001
Power Supply
Audiocom® Intercom Systems
9350-7710-000 Rev. A, 3/2002
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Operation
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1. Universal AC Power Input: The unit accepts any input power in the range of 100-240 VAC, 50/
60 Hz.
2. Connector to ES-4000A: This connector carries power to the ES-4000A expansion station, and
carries the four audio channels of the ES-4000A. When a telex ES-4000A is connected to the
PS-4001, each of the four channels of auido is “broken out” to the respective channel connec-
tor.
3. Intercom Channel Connectors: These connectors carry power to the intercom system and
provide termination for the audio signal of each individual intercom channel.
4. Channel Status Indicators: The indicators are green for normal operation and red when there is
an overload or short circuit. The circuitry in the unit will automatically reset when the overload
or short circuit is located and fixed, and the LED will go back to green..
5. BAL / UNBAL Selector Switch: This selector switch allows the user to configure the unit for
use in either an Audiocom® (BALANCED) or Clear-Com (UNBALANCED) system. Com-
patibility includes channel connector pin-outs, channel power requirements, and call signaling
requirements. The default setting for this switch is in the Audiocom® (BAL) position.
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Specifications
General
Input Power Requirements: 100 to 240 VAC, 50/60 Hz
Output Power (each channel): 24 ±1 VDC, 2 A
Dimensions 1.75”(44.5 mm) high x 8.25” (209.5 mm) wide x 10.31” (261.9 mm) deep
Weight: approximately 2.5 lb (1.13 kg)
Environmental Requirements:
Storage: -20°C to 80°C, 0% to 95% humidity, non-condensing
Operating: 0°C to 50°C, 0% to 95% humidity, non-condensing
Intercom Channels
General
Connector Type: One XLR-3M audio connector for each channel. Pin-out depends on setting of BAL / UNBAL
switch for balanced or unbalanced operation as defined below:
Balanced Mode (set to BAL position)
Line Terminating Impedance: 300 ohms ±10%
Connector Pin-out:
Pin 1
Pin 2
Pin 3
Common (audio and DC return)
Full-duplex, balanced intercom audio and +24 VDC output
Full-duplex, balanced intercom audio and +24 VDC output
Unbalanced Mode (set to UNBAL position)
Line Terminating Impedance: 150 ohms ±5%
Connector Pin-out:
Pin 1
Pin 2
Pin 3
Common (audio and DC return)
+30 ±1 VDC output
Full-duplex, unbalanced Intercom audio high
Approvals
UL, CUL, CE
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COPYRIGHT
COPYRIGHT © 2002 Telex Communications, Inc. All Rights Reserved.
TRADEMARKS
Audiocom® is a registered trademark of Telex Communications. Clear-Com® is a registered trademark of Clear-Com Systems.
Names of other products mentioned herein are used for identification purposes only and may be trademarks and/or registered
trademarks of their respective companies.
WARRANTY INFORMATION
Products are warranted by Telex Communications, Inc. to be free from defects in materials and workmanship for a period of one
year from the date of sale.
The sole obligation of Telex during the warranty period is to provide, without charge, parts and labor necessary to remedy covered
defects appearing in products returned prepaid to Telex. This warranty does not cover any defect, malfunction or failure caused
beyond the control of Telex, including unreasonable or negligent operation, abuse, accident, failure to follow instructions in the
manual, defective or improper associated equipment, attempts at modification and repair not authorized by Telex, and shipping
damage. Products with their serial numbers removed or effaced are not covered by this warranty.
To obtain warranty service, follow the procedures entitled “Procedure for Returns” and “ Shipping to Manufacturer for Repair or
Adjustment”.
This warranty is the sole and exclusive express warranty given with respect to Audiocom products. It is the responsibility of the user
to determine before purchase that this product is suitable for the user’s intended purpose.
ANY AND ALL IMPLIED WARRANTIES, INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY ARE LIMITED TO THE
DURATION OF THIS EXPRESS LIMITED WARRANTY.
NEITHER TELEX NOR THE DEALER WHO SELLS TELEX PRODUCTS IS LIABLE FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES OF ANY KIND.
CUSTOMER SUPPORT
Technical questions should be directed to:
Customer Service Department
Telex
12000 Portland Avenue South
Burnsville, MN 55337 U.S.A
Telephone: (952) 884-4051
Fax: (952) 884-0043
RETURN SHIPPING INSTRUCTIONS
Procedure for Returns
If a return is necessary, contact the dealer where this unit was purchased.
If a return through the dealer is not possible, obtain a RETURN AUTHORIZATION from:
Customer Service Department
Telex Communications, Inc.
Telephone: 1-800-392-3497 or (952) 884-4051
Fax: 1-800-323-0498 or (952) 884-0043
DO NOT RETURN ANY EQUIPMENT DIRECTLY TO THE FACTORY WITHOUT FIRST OBTAINING A RETURN AUTHORIZA-
TION.
Be prepared to provide the company name, address, phone number, a person to contact regarding the return, purchase order
number, the type and quantity of equipment, a description of the problem and the serial number(s).
Shipping to Manufacturer for Repair or Adjustment
All shipments of products should be made via United Parcel Service or the best available shipper prepaid. The equipment should
be shipped in the original packing carton; if that is not available, use any suitable container that is rigid and of adequate size. If a
substitute container is used, the equipment should be wrapped in paper and surrounded with at least four inches of excelsior or
similar shock-absorbing material. All returns must include the return authorization number. Units sent for repair or adjustment DO
NOT need a return authorization number
Factory Service department
Telex Communications, Inc.
West 1st Street
Blue Earth, MN 56013 U.S.A.
Upon completion of any repair the equipment will be returned via United Parcel Service or specified shipper collect.
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