Room Equipment; Emergency Power Off / Power Distribution Relay; Safety Interlocks; Low Speed Starter Tube Compatibility - CPI CMP 200 Series Service Manual

CPI Canada Inc.
2.6.8

Room Equipment

Refer to chapter 3C for connection of Buckys, interlocks, room lights, the DR imaging system (if
applicable), DAP, collimator lamp and system locks power, and to chapter 3D for installation and
calibration of AEC. It is suggested that these items not be connected until the initial run-up of the
generator is complete, and the tube auto calibration routine has been performed as described near the
end of this chapter.
2.6.9

Emergency Power Off / Power Distribution Relay

To connect an external emergency power-off switch, disconnect the jumper from J2-1 to J2-2 on the
generator control board. Then connect the emergency-off switch to J2-1 and J2-2. Refer to MD-0928 in
chapter 9.
For installations where installer-supplied auxiliary power distribution circuits are added to the
generator, 24 VDC is available on the generator interface board to drive the coil of the power distribution
relay. Connect the coil to J2-3 (+) and J2-4 (ground). Refer to MD-0927 in chapter 9. The maximum
current available from this source is 100 mA.
WARNING: THE EMERGENCY POWER OFF SWITCH DOES NOT REMOVE THE AC MAINS INPUT
VOLTAGE. HIGH VOLTAGE STILL EXISTS INSIDE THE GENERATOR IN THE AREA OF THE
AUXILIARY TRANSFORMER AND THE H.V. AUXILIARY BOARD. ENSURE THAT THE AC
MAINS DISCONNECT IS LOCKED OUT AND ALL CAPACITORS ARE DISCHARGED
BEFORE SERVICING.

2.6.10 Safety Interlocks

The room door interlock switch must be wired to the generator as described in Inputs in chapter 3C
before the generator is powered up. This switch must provide an open contact when the door is open.
2.7.0

LOW SPEED STARTER TUBE COMPATIBILITY

Before continuing, note the part number of the H.V. auxiliary board in the generator. Part numbers
739442-00 / 739445-00 have a 33 μF phase-shift capacitor, and are compatible with the type "R" stator
tubes listed in table 2-1. Part numbers 739442-01 / 739445-01 have a 45 μF phase-shift capacitor, and
are compatible with the type GE 23/23 Ω stators listed in table 2-1.
Confirm that the boost voltage is set correctly for the selected tube type per table 2-1 before continuing.
The procedure for setting the boost voltage is detailed in 2.7.1. The boost voltage may be measured from
F6 to F7 on the H.V. auxiliary board.
If the desired tube type is not listed, please contact CPI product support for assistance.
Confirm proper stator operation using a suitable tachometer before making any exposures.
WARNING: HIGH VOLTAGE IS PRESENT ON THE H.V. AUXILIARY BOARD AT ALL TIMES THAT THE
GENERATOR IS SWITCHED ON. TAKE APPROPRIATE PRECAUTIONS WHEN SERVICING
THIS BOARD
Use and disclosure is subject to the restrictions on the title page of this CPI document.
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CMP 200 X-Ray Generator Service Manual Ch # 901476-02 Rev. C
2
Installation
Page 2-15