The "heart" of the Series 4200 intercom system. Adjusts automatically for 12 or 24 VDC power source. Unit has connection points for DC power and a mobile radio system. Provides outputs for control heads and outputs for intercom system. The U4200 has no external controls and is designed to be located remotely. System on/off and master volume control is accomplished at the control head location. External LED indicates power on condition.

Size: 8-3/4"L X 4-3/4"W X 3-1/4"H
Weight: 4 lbs. 3 oz.
Power Draw: 280 ma (Nominal)

Provides connection from master station to DC power source. Weather tight, twist lock connection to master station. Power source end has stripped and tinned leads. Twenty foot, 2 conductor shielded cable, 20 gauge.

Weight: 2 lbs. 8 oz.

Provides connection between master station and mobile radio system. Weather tight, twist lock connection to master station. Radio end has stripped and tinned leads. Twenty-one foot, 8 conductor shielded cable, 24 gauge.

Weight: 2 lbs. 8 oz.

Provides system on/off control and system master volume control. Unit also serves as a headset station enabling one user to access the intercom system with radio PTT (Push To Talk) capability. Control head has headset jack with listen level control, radio PTT button and power on / transmit indicator on the front of the unit, control head cable port and system ports are provided on rear of unit.

Size: 4"L X 5"W X 1-3/4"H
Weight: 1 lb. 1 oz.

U4211
Control Head (not pictured)

Same features and functions as U4210 and has VOX (Voice Activated Intercom) feature with sensitivity control on front of unit.

Size: 4"L X 5"W X 1-3/4"H
Weight: 1 lb. 2 oz.

Provides a connection point for one headset with intercom capability. Unit has headset jack with listen level control, 2 intercom system connections are provided on rear of unit.

Size: 2-7/8"L X 3-1/2"W X 1-3/4"H
Weight: 10 oz.

Same features and functions as model U4220 and has VOX (Voice Activated Intercom) feature with sensitivity control.

Size: 2-7/8"L X 3-1/2"W X 1-3/4"H
Weight: 10 oz

Has radio PTT (Push To Talk) button. Provides a connection point for one headset with intercom capability. Unit has headset jack with listen level control, 2 intercom system connections are provided on rear of unit.

Size: 2-7/8"L X 3-1/2"W X 1-3/4"H
Weight: 10 oz

Same features and functions as model U4222 and has VOX (Voice Activated Intercom) feature with sensitivity control.

Size: 2-7/8"L X 3-1/2"W X 1-3/4"H
Weight: 10 oz

Provides intercom and radio interface connection. Must be used with Belt Station C4215.

Size: 2-7/8"L X 3-1/2"W X 1-3/4"H
Weight: 10 oz.

Contains radio PTT (Push To Talk) button, headset jack and listen level control, 15 ft. coil cord with connector. Ideal when intercom and radio interface is required at the pump panel. (For use with U4224 Radio Interface Module only)

Size: 3-1/4"L X 2-1/2"W X 1"D
Weight: 20 oz.

Behind the head style designed to be worn with fire helmets. Provides superior noise attenuation for hearing protection and clear isolated reception. M-77 noise cancelling boom mounted microphone provides clear transmission at normal voice levels. Microphone on/off switch located on the earcup activates / disables microphone (switch does not disable earphone in either position). Adjustable overhead nylon strap and pivoting earcups provide superior fit and comfort. Eight foot coil cord (extended) with quick disconnect. Tested in accordance with ANSI Standard S13.4 - 1974
Certified NRR 24dB

H4241
Headset with Boom Microphone: same as H4240 except only one earphone. Left dome is slotted to hear ambient sound. (Not pictured)

Over the head style. Superior noise attenuation for hearing protection and clear isolated reception. M-77 noise cancelling boom mounted microphone provides clear transmission at normal voice levels. Microphone / boom assembly allows placement of microphone on right or left side. Microphone on/off switch located on the earcup activates / disables microphone (switch does not disable earphone in either position). Adjustable headband, stirrup pivot assemblies and thick ventilated cushion headpad provide superior comfort. Eight foot coil cord (extended) with quick disconnect. Tested in accordance with ANSI Standard S13.4 - 1974
Certified NRR 24dB

C42-16
Weight: 1 lb. 8 oz.

C42-31
Weight 2 lbs. 14 oz.d

C42-02 Weight: 6 oz.
C42-08 Weight 14 oz.
C42-12 Weight 1 lb. 3 oz.
C42-25 Weight 2 lbs. 3 oz.
C42-50 Weight 4 lbs. 3 oz.
C42-75 Weight 6 lbs. 3 oz.
C42-100 Weight 8 lbs. 3 oz.
C42-125 Weight 10 lbs. 3 oz.
C42-140 Weight 16 lbs. 3 oz.

Uses state of the art technology to record and playback intercom and two way radio transmission. Unit automatically enters record mode as soon as the system is turned on. The unit can record up to 2 minutes of information in an endless loop. At playback mode the operator has the choice of playing back the entire two minutes or any portion. THe operator can also choose to stop recording by pushing the pause switch thus saving the present information to be played back at any time as long as the system power is on. When system is turned off, recorded information is erased.

Size: 2-7/8" X 3-1/2" X 1-3/4"
Weight: 9 oz.

Provides connection between model U4240 Digital Voice Recorder and the master station. Weather tight twist lock connectors at both ends. Three foot, 8 conductor shielded cable, 24 gauge.

Weight: 4 oz.