dBu is an absolute measurement. 0dBu is referenced to 0.775 volts RMS

Microphone Pre-Amplifier

Mic to Line (without limiter acting)
Frequency Response: 280 – 15kHz ± 3dB
Microphone output to line – Audio Level (-50dBm Electret input): -9dBm
Microphone output to line – Distortion: <0.1%
Microphone output to line – Signal to Noise: >65dB

Headphone Pre-Amplifier

Frequency Response – Line to Headphone: 150 – 20k Hz ± 3dB
Headphone input from line – Audio Level (-9dBm Electret input): 3.5dBm
Headphone input from line – Distortion: <0.5%
Headphone input from line – Signal to Noise: >50dB
Earphone to Mic – Crosstalk: >80dB
Sidetone – Adjustment Range (-80db mic input): >45dB

Keypad Indicators

Power: Green LED
Talk: Green LED
Call: Orange LED

Connectors

Intercom Line: (2) 3-pin XLR–M–F
Ch. 1 2-Wire

Intercom Channel

Pin 1: Common
Pin 2: PL Power (+28VDC)
Pin 3: Line (Audio)
Headset: 4-pin XLR–M

Headset Connector

Pin 1: Mic – (Mic Common)
Pin 2: Mic +
Pin 3: Spkr-
Pin 4: Spkr+ (and 0.5*VCC DC, supply between Pin 4 and Pin 1)

Power Requirements

Input Voltage Range: 12-30V DC
Input Current (Idle): <=12mA
Input Current (Max): <=28mA

Call Voltage

16.5V DC
Minimum Voltage Needed: 3.3V

Environmental

32˚F – 140˚F (0˚C – 60˚C)
Relative Humidity: 0 – 96%, non-condensing
Vibration Frequency Range: 2 – 13.2Hz,
Amplitude: 1.0mm
Peak Value Frequency Range: 13.2 – 100Hz,
Acceleration Amplitude: 0.7g

EMC: DNVGL-CG-0339 – Class A

Enclosure: Salt-mist IP-53

Dimensions

3.4 x 4.5 x 1.7in (HxWxD)
(86 x 114 x 43mm)

Weight

10.5oz (0.30kg)

Certifications and Compliance

This device complies with part 15 of the FCC Rules.
This device complies with European Union CE Mark:

• Electromagnetic Compatibility Directive 2014/30/EU
• Low Voltage Directive 2014/35/EU
• RoHS Directive 2011/65/EU
• Standards: EN 55032, EN 55024, EN 60950-1, EN 50581

This device complies with Maritime Certification:

• Conformity with DNVGL-CG-0339 Edition November 2016
• Asbestos-free in accordance with SOLAS Regulation II-I/3-5.2
• Compass Safety Distance conformity per DNVGL-CG-0339 and IEC 60945