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INTRODUCTION
The Hytec TB8212 is a single-width VME64X
Transition Board which routes 64 channels of analogue I/O with the following
characteristics:-
4 groups of 16 analogue channel pairs
Allows use of PT100 or thermocouple DIN Rail Board (8913-P or T) with
IP-MADC-8403
4 50-waySCSI connectors 1-4 routed to 8002 Carrier Board sites A-D
respectively
16 channels of differential filters condition 8403 inputs
Differential mode 16 differential channels multiplexed as two groups of
eight for reading PT-100s or thermocouples via the 8913-T/P.
CAL signal from 8403 used to select multiplexer input group.
On-board DC-DC Converters power and isolate the multiplexer switches.
4 DC-DC Converter socketed sites allow 5V to +/-12V isolated power for
each group
4 signal pairs for External Trigger
4 signal pairs for External Clock
Analogue Ground connections
Ground discharge limited on insertion
SPECIFICATION
Mechanical: Standard 6U high VME64X transition board
Operating temp: 0 to 45 deg C ambient
Number of channels: 64
Input/output voltage range: 0 to +/-5V (8403 range is +/-2.5V)
Jumpers: Select PT or thermocouple mode
PT Mux Control: /CALEN allows external switch control by 8403
Isolation: 100V with respect to VME 0V limited by 8403
Power: +5V @ 5A typical if DC-DC converters fitted.
BOARD DESCRIPTION
The board is primarily intended to route 4 groups of 16 analogue inputs from
PT100 or thermocouple terminal boards to IP-MADC-8403 cards mounted on an
8002 Carrier Board. It has R-C filters across the differential inputs of the
ADCs. Viewing the component side of the board there are four similar groups
each with two 5-pin sockets. These allow Hytec DC-DC Converter boards to be
fitted which supply +/-12V to their respective sites via the P0/P2 VME
connectors. Each converters output is smoothed by two 10uF tantalum
capacitors. The P2 mating connector is the 160 way DIN connector at the base
of the board. The P0 mating connector is situated above it. The four
analogue groups are designated A-D from the base upwards. Front panel SCSI
connectors 1-4 feed sites A-D and are numbered upwards from the lowest
connector. Noise filters are provided for all 16 channels of each group.
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