Instruction Manual - DECA | Diving Equipment Company of America

CONTROLS & CONNECTIONS
DIVER CONNECTIONS (continued) 5.5
EARPHONE Jack (output) – 4 Wire, (Diver 1, 2 & 3) - This connector is dual 5-Way
Binding Post Jack (color coded black). It is the connection point for the diver’s earphone
when operating in the Simulcom mode (4-wire).
COMMUNICATOR MODEL 2830A-MS (MS CONNECTORS, 5 PIN)
UMBILICAL Connectors - Each diver has one MS Connector. The MS Connector has 5
pins for contacts.
Pin A and Pin B (Input/Output) – Functions as a microphone (input) and as an earphone
(output) when PTT switch is depressed (used in both 2 & 4-wire mode).
In the 2-wire mode of operation, microphone is connected into the Umbilical Connector Pin
A & B, also Earphone is connected into Umbilical Connector Pin A & B. Conversation’s
(up-link & down-link) are switched automatically when push to talk switch is actuated.
When a pre-amp microphone is used in the 2-wire mode setup, it is required to have
special speakers supplied only by Amron.
In Simulcom (4-wire) mode, only the diver microphone is connected into umbilical
connector pin A&B.
Pin C and Pin D (Output) – It is the connection point for the diver’s earphone when
operating in the Simulcom mode (4-wire).
Pin E (Earth Ground) – Connected to communicator chassis and ground of AC cord.
When communicator AC cord ground pin is contacted to Earth Ground, then Pin E of each
diver MS Connector will become Earth Ground.
OTHER CONNECTIONS 5.6
EXTERNAL BATTERY - (Input) - External 12 VDC power input, to operate the unit from an
external battery or power source. Power requirements are 12 volts DC (nominal), not less than 9.5
or more than 18 volts. Source must be able to supply a peak current of three amps for proper
operation. With the model /23 Option these jacks are used for charging the internal batteries.
It is highly recommended to use an Amron External Charger, Model 2823-602 as external power
supply. The Amron External Charger was specifically designed for use with all Amron
communicators and has a high degree of insulation between the primary and secondary circuits
for diver protection and safety.
WARNING: When using an external power source, it is required to use an insulated DC power
supply that has very low ripple voltage. It has to be properly insulated from AC line for diver
protection and safety. An improperly insulated power supply could cause diver electric shock.
TAPE RECORDER – provides an isolated output, of both diver and tender conversations
(balanced), suitable to drive a tape recorder or audio input of a VCR. This feature allows recording
of conversations between diver and tender.
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