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Sigtronics Emergency Apparatus Intercom System (EAI)
INSTALLATION AND OPERATING INSTRUCTIONS
INTRODUCTION
ATTENTION INSTALLER: To assure a trouble free Installa-
tion, please read these entire instructions through once
before beginning.
The Sigtronics EAI system, when used with Sigtronics noise
attenuating headsets provides the emergency apparatus
crew with clear, hands free, voice actuated (VOX) intercom.
The system also allows full radio monitoring at all headset
positions as well as radio transmit capability from selected
headsets via Push-To-Talk (PTT) switches.
Applications: The unit is designed for fire apparatus, rescue
and ambulance vehicles, marine emergency equipment,
airport ground vehicles, and mobile emergency command
centers.
WARNING: This product can expose you to chemicals including
Polyvinyl Chloride, which is known to the State of California
to cause cancer, and Lead, which is known to the State of
California to cause birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov.
S
igtronics
Models EAI-S4, EAI-S6, EAI-D4, and EAI-D6
Specialists in "SOUND" Management
®
178 East Arrow Highway, San Dimas, CA 91773 ( 909 ) 305-9399
Voice Activated Intercom (VOX) feature allows "hands free"
communication between headsets connected to the EAI unit.
Start speaking and the intercom turns on instantly to relay
your message clearly to the other headsets. Stop talking and
it turns off to reduce background noise.
Up to Four Headset Positions can be connected to the
EAI unit. More headset positions can be achieved by wiring
additional jacks in parallel. Only one headset, however, can
be plugged into paralleled jacks at one time. This paralleled
jack scheme is most commonly used on pumper trucks at the
pump panel. In this case, the driver plugs his headset into the
engineer's jack while driving. He then unplugs and plugs into
the pump panel when he arrives on scene.
Headphone Output: The EAI system is designed to easily
drive six or more 300 to 1000 ohm headsets.
Noise attenuating, full cushion headsets, such as the Sigtronics
SE-8, or SE-48 are recommended for best results. The EAI
system incorporates an automatic headphone limiting circuit
to eliminate the possibility of painful spurious radio or noise
spikes from getting to the headsets and into your ears.
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Table of Contents
Related Manuals for Sigtronics EAI-S4
Summary of Contents for Sigtronics EAI-S4
- Page 1 Start speaking and the intercom turns on instantly to relay your message clearly to the other headsets. Stop talking and The Sigtronics EAI system, when used with Sigtronics noise it turns off to reduce background noise. attenuating headsets provides the emergency apparatus Up to Four Headset Positions can be connected to the crew with clear, hands free, voice actuated (VOX) intercom.
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Page 2: Control Functions
Jack Insulator Washer, Flat ......5 ....... 7 single vehicle radio. The EAI-S6 is identical to the EAI-S4 but Jack Insulator Washer, Shoulder .....5 ....... 7 can intercom up to six people at one time. The EAI-D4 is used Radio Adapter Mounting Screws ...4 ....... - Page 3 I NT ER COM in the Adapter chassis. Be sure not to pinch any wires under the panel. Replace the 4 corner panel screws and tighten. EAi-S4, EAi-S6, EAi-D4, EAi-D6 i SigtronicS igtronicS...
- Page 4 If you are installing an EAI-D4 or EAI-D6 continue on with the fol- with open jump seats located right next to the vehicle engine. lowing. Otherwise, for a EAI-S4 or EAI-S6 skip down to “Headset There are two solutions for this situation. The first one is the Jack and PTT Switch Installation”...
- Page 5 Refer to the EAI Wiring headset jacks that can accommodate thicker panels are available Diagram (for EAI-S4 or EAI-S6 see Figure 4 on page 6 for EAI-D4 or from your Sigtronics dealer (order part number 100418 - maxi- EAI-D6 see Figure 5 on page 7) for the exact wiring information.
- Page 6 WIRES TO CREW #3 AND #4 AS ON OTHER JACKS. HEADSET JACK DRIVER EAI-S4 / S6 ( SINGLE RADIO ) WIRING DIAGRAM compartments, or doors. If the vehicle’s cab tilts up for engine tor J3 into the mating connector P3 on the Radio Adapter unit.
- Page 7 Note that for 2 and 3 above, it will only squeal if a headset is 4. Check specific “bad” headset jack wiring for: actually plugged into the specific jack that is wired incorrectly. EAi-S4, EAi-S6, EAi-D4, EAi-D6 i SigtronicS igtronicS...
- Page 8 Electrical motors in fans or light bars with rotating down to “Radio Hook Up” on page 9. If you did hear electrical lights are two common examples. noise, use the following to track down the problem: EAi-S4, EAi-S6, EAi-D4, EAi-D6 i igtronicS ntErcomS...
- Page 9 Refer to the EAI Wiring Diagram -Figure 4 on page 6 for RADIO 1/ RADIO 2 switch to “RADIO 1” and the AUTO / BOTH EAI-S4 or EAI-S6 units or for EAI-D4 or EAI-D6 see Figure 5 on page switch to “AUTO”.
- Page 10 Check the Radio Transmit Mic Level adjustment. well as shorten the life of the vehicle’s batteries. c) If the EAI is connected to a Midland radio a Sigtronics Mic 2. Dispatch says too much background noise or unclear or weak Level Amplifier might be required to boost the transmit transmissions.
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Page 11: Radio Operation
Captain or Engineer positions can transmit at any time simply by pressing their PTT switch. The Crew positions cannot transmit on the radios. When one position transmits, several things take place automatically: EAi-S4, EAi-S6, EAi-D4, EAi-D6 i SigtronicS igtronicS... -
Page 12: Two Year Warranty
TWO YEAR WARRANTY Every Sigtronics product has been carefully inspected before shipment. We guarantee to correct any defect caused by faulty mate- rial or workmanship free of charge to the user who originally purchased the product for a period of two years from the original purchase date.
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