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Operation
The EMS-4001 channels operate identically to channels one and two of the MS-2001. Refer to the MS-2001 User
Instructions for all operating information.
Specifications
General
Input and Output Power:
AC Input: 100-240 VAC, 50/60 Hz
Channel Power (each channel): 24 ±1 VDC, 2 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, non-condensing
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.