May 25, 2005 6881096C74-B
2-4 Product Overview: Control-Head Assembly
2.3.2.3 Remote-Mount W3 Hand-Held Control Head Configuration
Because the W3 control head does not have an interface for VIPs on the control head itself, the radio
and the W3 interconnect board must work together to provide VIP OUT at the back of the radio
(Figure 2-4). The driving transistors (for the ON/OFF relay control) are located on the W3
interconnect board. Therefore, the microprocessor on the main board uses one set of lines to
interface with the interconnect board's transistors and a second set of return lines, which travel back
to the main board and pass through to the back of the radio. Also, by using a Y-split cable HKN6096,
VIP OUT also can be accessed at its 15-pin connector. However, the voltage levels are slightly lower
since the VIP SWB+ of the interconnect board is different from the SWB+ of the radio.
Figure 2-4. VIP Remote-Mount W3 Control-Head Configuration
2.3.2.4 Remote-Mount plus DEK Configuration
Another remote-mount configuration possibility is the addition of up to three Direct Entry Keypad
(DEK) boxes (Figure 2-5 on page 2-5). A DEK is an accessory that is used with a mobile radio to
provide extra buttons, indicators, and VIPs to the user. Just as the VIP output pins moved from the
rear of the radio to the rear of the control head, the VIP pins also move from the back of the control
head to the back of the DEK. The benefit of using a DEK box is that you gain three additional
VIP OUT and VIP IN pins for each DEK added. The first DEK box provides the original three
VIP OUT and three VIP IN pins. The next DEK provides an additional three VIP OUT and three
VIP IN pins. A final DEK box provides an additional three VIP OUT and three VIP IN pins for a total
of nine VIP OUT and nine VIP IN pins.
Pin 16
Pin 17
Pin 16
Pin 17
Pin 14
Pin 27
Pin 18
Pin 17
Pin 13
Pin 14
Pin 11
Pin 12
Pin 18
Pin 19
VIP OUT 1
Micro-
processor
VIP OUT 2
JU512
JU513
W3 Remote
Interconnect
Board
Main Board
(Radio)
MAEPF-27923-O
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