CPI Indico 100 Series Service And Installation Manual page 152

3D
AEC Calibration
3D.2.7 AEC Board (Universal AEC Board) Cont
The following table shows the pinouts for the 12 pin connectors J1 to J4 on the AEC board in figure 3D-10
and 3D-11. The pins on J7 are all connected in parallel, thus the PMT high voltage may be taken from any of
the pins on that connector.
The connections to the AEC pickup chamber vary considerably between ion chambers and solid
state chambers. For clarity two tables are shown below, the first for ion chambers and the second for solid
state chambers.
FUNCTION
+500 VDC output
+300 VDC output
+50 VDC output
+12 VDC output
-12 VDC output
-24 VDC output
Ground
Start command output
Left field select
Middle field select
Right field select
Signal input
FUNCTION
+500 VDC output
+300 VDC output
+50 VDC output
+12 VDC output
-12 VDC output
-24 VDC output
Ground
Start
Left
Middle
Right
Signal input
Page 3D-18
PIN
1
2
3
4
5
6
7
8
9
10
11
12
Table 3D-8: Ion chamber connections
PIN
1
2
3
4
5
6
7
8
9
10
11
12
Table 3D-9: Solid state chamber connections
Rev. D Millenia / Indico 100 Series Service Manual
NOTE
+500, +300, +50 VDC outputs provided for ion
chamber use if required. +12, -12, -24 VDC
outputs are typically used as the DC supply for
a pre-amplifier, often part of the ion chamber.
The start command, and left, middle, right
field select outputs are jumper configured to
be active high or active low as per the AEC
chamber requirements. The signal input is
jumper configured to accept a positive going
or negative going ramp or DC signal as per
the AEC chamber output.
NOTE
Not used for solid state AEC chambers
Not used for solid state AEC chambers
Not used for solid state AEC chambers
Not used for solid state AEC chambers
Not used for solid state AEC chambers
Not used for solid state AEC chambers
Connect pin 8 to pin 7 (ground). Connect the
common anodes for left, middle, right to pin 8.
Connect cathode (left) to LEFT, cathode middle
to MIDDLE, and cathode right to RIGHT.
Cable shield (if used) connects to pin 8.
Not used for solid state AEC chambers
CPI Canada Inc.
Ch # 740904-06