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Motorola direct entry keyboard dek T5174C
DEK is an abbreviation for Direct Entry Keyboard. DEKs are accessories that attach to Systems 9000 control heads with the DB-50 connector. One or two DEKs can be attached to the control head which must be programmed in the RSS. Each DEK has 8 programmable keys. Each of the 8 DEK keys had a LED light above it.
The first DEK plugs into the control head Vehicle Interface Port (VIP) connector. When a DEK is programmed into the code plug with the RSS, the control head VIP port no longer functions as a VIP port. The control head VIP port becomes a DEK interface port and the VIP port functions are transferred to the DEK VIP-II connector. This was done because the DEK cable uses the control head VIP port connector and certian control head VIP pins are diverted for use by the DEK.
J1 DB-50 connector Systems 9000 connector viewed from back of the control head.
Systems 9000 Control Head VIP Connector
* The grayed out Switched B+ and Digital Ground connections above are not connected to the Motorola DEK cable.
J1 DB-50 connector Systems 9000 connector viewed from back of the DEK.
Input from Control Head or DEK
For more informations go to this site: http://www.open.org/blenderm/syntorx9k/dekx9.html
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