Federal Signal’s AudioMaster® 310X-MV is a two-way industrial intercom that provides reliable communications and superior sound quality. This unit has a rugged Type 4X housing and is rated for Class I, Division 2, Groups A, B, C, & D; Class II, Division 2, Groups F & G; and Class III.

The AudioMaster 310X-MV’s standard features include volume control, call button, balanced line output, dust- and water-tight housing, listen/talk switch, remote device activation, and the ability to power another intercom at 24VDC.

This heavy duty intercom will operate from -31°F to 149°F (-35°C to 65°C) for both indoor and outdoor applications. Remote device activation allows you to activate an auxiliary signal such as a horn or light.

The AudioMaster 310-MV intercom is easy to operate.  Press the toggle switch to talk and then release to listen.  Additionally, press the call button to get the attention of personnel at another intercom.

The 310X-MV is ideal for use at oil refineries, petrochemical plants, offshore platforms, pulp and paper mills, water treatment facilities, airports, shipyards or anywhere reliable two-way communication is important for safe and efficient operation.


Voltage 24VDC
120VAC 50/60Hz
240VAC 50/60Hz
Mount Wall
Operating Current 260 mA at 24VDC
163 mA at 120VAC
82 mA at 240VAC
Operating Temperature Minimum -31 °F
Operating Temperature Maximum 149 °F
Standby Current 62 mA at 24VDC
70 mA at 120VAC
35 mA at 240VAC
Frequency Response 150Hz-12KHz
Input Impedance 3400 Ohms
Speaker Rating 30–Watts
Enclosure Rating Type 4X
Ingress Protection (IP) IP65
Height 9.880 in
Width 6.500 in
Depth 5.000 in
Net Weight 9.90 lb
Shipping Weight 11.50 lb

Ordering Information

Model Types
Model Description UPC
310X-MV Intercom, 24VDC/120VAC/240VAC, hazardous location, industrial, wall mount 78297939103
Replacement Parts
Description Part Number UPC
PCBA, 310X-MV K2001915C-02 782979380672
Connector, 10 position K140A326A-01 782979285007
Resistor, 1K, 1W, 1%, 310-MV K101216A 782979219170
Gasket, cover, 310X-MV K8590013B-01 782979216735
Kit, potentiometer, 10K K8590237A 782979205913
Switch, toggle K122A298A 782979232445
Kit, switch, push button K8590241A 782979205937