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7.2.3
Interface Board
The MX04/ MX08 connects to the interface board via a 34-position ribbon cable.
Attach the ferrite clamp (part 840954-011) included in the expansion kit to the
34-position ribbon cable at the end closest to the interface card (the board with the RJ11
connectors).
The interface board is fixed inside the back panel of the control computer, and is fitted
with RJ11 connectors to allow easy connection to MAX-1000 subracks, keyboards, and
other MAX-1000 equipment. Pin connections from the RJ11 connectors are as follows:
Pin 1 – 12VDC
Pin 2 – N/C
Pin 3 – TX Data
Pin 4 – Signal GND
Pin 5 – Rx Data
Pin 6 – Power GND
The interface board provides fused 12VDC only at RJ11 connectors 3 and 4 (ports 3 & 4)
to power HEGS5300 and ULTRAKey keyboards.
Rev. C
RJ11 Socket (rear of System Controller)
Pin 6
NOTE: When D25 connectors are provided, (or fitted to a
System Controller), standard RS-232 pin allocations
apply (i.e. pin 2 = TX, pin 3 = RX, pin 7 = GND).
NOTE: When D25 connectors are fitted to a System
Controller, the keyboard power (HEGS5300) is provided
on port 4 (i.e. pin 13 = +12VDC, pin 25 = GND).
NOTE: A maximum of 2 keyboards can be powered
directly from a single interface board.
7.2-3
Pin 1
HMXMU001018
10/06
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