Power; Interface Connections - Hologic QDR 4500 Technical Manual

Right
Reset

Power

Power input to the TZ Drive board is +24VDC from the Distribution board and 240VAC from
the Operator's Console Power Module. +24VDC powers circuitry located on this board and is
reduced to +5VDC. +5VDC is converted to -5VDC and +/-3VDC. The +5and -5VDC powers
logic circuitry on this board, while the +/- 3VDC provides the reference voltage for the position
sensors. Two green LEDs provide visual indication of the +24 and +5VDC status (ON indicates
the respective voltage is present).
The 240VAC power is connected through control relays to the pedestal motors.

Interface Connections

Figure 2-4 shows the interconnections between the Distribution board, the TZ Drive Board, the
Pedestal Motors, and the Pedestal Position Encoders. Table 2-5 describes the interconnections
between the Distribution board and the TZ Drive Board. Table 2-6 describes the line voltage
(240VAC, line to line) between the Operator's Console Power Module and the TZ Drive Board.
Table 2-7 describes the interconnections between the TZ Drive Board and the two pedestal
motors and their respective position encoders. The tables also identify the interconnection
connector and pin assignments.
2-8
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QDR 4500 Technical Manual
When the TZ drive is in Service mode, moves the right pedestal in the
direction specified by the Direction switch (not active in normal mode).
Resets the board after manual operation. The TZ Drive board must be
reset after any manual operation.