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VDB8901T/D DIN Rail Mounted
Terminal Board
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Connects plants signals to VME64x modules
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Constructed from high impact plastic
Product Description
The Hytec 8901-T/D is a DIN-Rail mounted board which allows connection to
Industry Pack I/O cards mounted on a VME64X carrier board . It connects to
the IP cards via an analogue I/O transition board type 8202 or digital I/O
transition boards using a 50-way SCSI cable.
• 50-way terminal connection to plant equipment
• 50-way SCSI socket connects to transition board
• Supports one IP card or 16 channels on the 8001 Digital I/O Board
• LED indication of current flow
• Jumpers enable LEDs to be shorted out for analogue applications
• Indication of +24V presence for use with 8301 Transition Board
• Transient voltage protection
Product Specifications
Size: DIN-rail mounted module approx 150x75x45mm
Operating temp: 0 to 45 deg C ambient
Power Requirements: Optional +24V indication of transition board isolated
power
Number of channels: All 50 lines bussed
Number of signals: I/O 1-16, TRG, CLK, STR,STB, +24V, AGnd, plus 4 spare
pairs Connectors: SCSI 50-way socket for connection to transition board
50-way terminal screws
Transient protection: 26V clamp rising to 40V max @ 10A using varistors
Board Description
The board is primarily intended to allow plant connections to VME64X board
I/O using screw terminals. The signals are routed to a VME64X transition
card using a 50-way twisted pair SCSI cable. The signal pair for I/O1
connect between T26 and T1. The pair for I/O2 connect between T27 and T2 and
so on up to T50 and T25. These are connected to the relevant pin numbers on
the SCSI connector. Jumpers J1-J20 can be used to short circuit the
respective LEDs when input currents are not monitored i.e. the LED
monitoring is disabled and the circuit is connected straight-through. The
LED which indicates the presence of +24V is over-voltage protected by a
varistor. Links LK1 and LK2 disconnect pins 25 and 50 of the SCSI.
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