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EMS-4001 Specications
General
Input and Output Power:
AC Input: 100-240 VAC, 50/60 Hz
Channel Power (each channel): 24 ±1 VDC, 1 A
Dimensions: 1.75” (44.5 mm) high, 19” (483 mm)
wide, 10.31” (261.9 mm) deep
Weight: approximately 4.5lbs (2kg)
Environmental Requirements:
Storage: -20°C to 80°C; 0% to 95% humidity, noncon-
densing
Operating: -15°C to 60°C; 0% to 95% humidity, non-
condensing
Program Input Connectors
Input Level: 100mV maximum
Voltage Gain: 25 ±3 dB
Output Level (to intercom channel): 1.0Vrms nominal,
2.3Vrms max.
Input Impedance: 75k ohms
Common Mode Rejection: Greater than 50 dB
Connector type: DB9F female, 9-pin D-Sub
Pin 1: Common
Pin 2: Channel 3 program in low
Pin 3: Channel 4 program in low
Pin 4: Channel 5 program in low
Pin 5: Channel 6 program in low
Pin 6: Channel 3 program in high
Pin 7: Channel 4 program in high
Pin 8: Channel 5 program in high
Pin 9: Channel 6 program in high
Intercom Channels, Balanced Mode (BAL/UNBAL
switch set to BAL)
Output Level: 1 Vrms nominal
Input Impedance: 300 ohms ±10%
Bridging Impedance: greater than 10,000 ohms
Sidetone: -40 dB, 35 dB adjustable range
Figure 4 - EMS-4001 sidetone adjustment locations.
Call Signaling:
Send: 20 kHz ±100 Hz, 0.5 Vrms ±10%
Receive: 20 kHz ±800Hz, 100 mVrms
Mic-Kill Frequency:
Send: 24 kHz ±100 Hz, 0.5 Vrms ±10%
Receive: 24 kHz ±800 Hz, 100 mVrms
Noise Contribution: less than -70 dB
Common Mode Rejection Ratio: greater than 50 dB
Connector type: One XLR-3M for each channel
Balanced Conguration Pinouts
Pin 1: DC/audio Common
Pin 2: Intercom audio low and +24 VDC output
Pin 3: Intercom audio high and +24 VDC output
Intercom Channel, Unbalanced Mode (BAL/UNBAL
switch set to UNBAL)
Output Level: 2 Vp-p (750 mVrms)
Input Impedance: 200 Ohms ±10%
Bridging Impedance: greater than 10k ohms ±5%
Call Signaling:
Send: 11 ±3 VDC
Receive: 4 VDC minimum
Connector Type: One XLR-3M for each channel
Pin 1: Common
Pin 2: +30 ±1 VDC output
Pin 3: Intercom audio high
Expansion Input/Output
Connector Type: 1/8” Stereo phone jack
Tip: Talk output
Ring: Listen input
Sleeve: Common
Ordering Information
EMS-4001
4 channel expansion station with 2.0 amp power sup-
ply with instantaneous auto reset in a single unit.
Catalog Number: 90007713000
This specications information is preliminary and is subject to change without notication.
Brand names mentioned are the property of their respective companies.
Contact Information
Telex Communications, Inc.
12000 Portland Avenue South
Burnsville, Minnesota 55337
Telephone: (800) 392-0498
Fax: (800) 323-0498
Form Number: 9320-7713-000 Rev B
Date: December, 2006