EL-1266Miscellaneous Drawings
Galil Amplifier Panel Wiring,
EL-1266
Schematic: Multipurpose\AMPPANEL.sch.pdf
Page last updated: May 14, 2002
This drawing shows the connections of the various servo stages on sheet one and the 57-pin CPC connector to the Amplifier Panel J0 and J10 on sheet two. Note, these sheets are too complex to show here. You can however bring them up in a separate viewer or refer to the hard copies.
Sheet 1
Each of the servo stage connectors are wired that same so we will just look at connectors J1 that connects to the servo stage and J21 that connects to an auxiliary encoder. All of the logic inputs such as FLSA and IN1/LX are pulled low via the limit switches for a true.
To start with, pins 1 through 4 carry the motor drive current so they are doubled up to increase the current carrying capabilities. They are wired such that each of two twisted pairs contains a +Motor and a -Motor signal. Pin 5 is connected to pin-41 of the AMP-1140, IN1/LX, and is wired to the secondary motion limits, when used. These limits are wired in parallel so that contacting either one will signal the Galil controller to abort movement. Because these limits disconnect the power to the motor, the only way to get back out of the limit is to manually turn the shaft of the motor to back off the stage. Pin 6 is a ground that originates at terminal strip TBB-11 and is wired to the common side of the two secondary limit switches. Pins 7-10 are the buffered, differential input lines for the motor encoder (in most cases - see EL-1236 through EL-1238). They connect to pins 77, 78, 79 and 80 of the AMP-1140. Pins 11 and 12 come from terminal strip TBA-1 and TBB-3 and supply +5V and ground to the EL-2260 Encoder Buffer card and the motor encoder. Pins 13 and 14 are not assigned. Pin 15, FWD. LIMIT, and pin 16, REV. LIMIT, are connected to pins 63 and 64 of the Galil and carry the 'low true' primary limit signal from the servo stage. These signals are not used on rotational stages. Two ground wires originate at terminal strip TBB-4. When used pin 17 is wired to the forward and reverse primary limits and pin 18 supplies the ground to the home fiducial. Pin 19 is the HOME signal and is wired to pin 65 of the controller. Pin 20 comes from terminal strip TBA-1 and brings +5V out to the home fiducial. Pin 21 is wired to pin 26 of the controller and when it is pulled low, the LED in the home fiducial is turned on to enable it. Pins 22 through 24 are not assigned. Pins 25 and 26 carry the individual shields of the cables twisted pairs to the common shield point on the amplifier connector panel.
Towards the right-hand side of the drawing are connectors J21 through J28. These are the input jacks for a secondary encoder when used. ESI uses secondary encoders on the three rotating wheels, Slitmask, Filter and Aperture, and the three Collimator actuators. Pin 9 comes from terminal strip TBA-9 and supplies +5V to the encoder. Pin 8 comes from terminal strip TBE-10 and supplies the ground. Pins 7 and 6 carry the differential A signal from the encoder to pins 59 and 58 of the AMP-1140. Pins 5 and 4 carry the differential B signal from the encoder to pins 57 and 56. Pins 3 and 2 carry the differential INDEX signal from the encoder to pins 81 and 82. Pin 1 is the shield.
Sheet 2
This diagram shows the ground and +5V connections between the various stage connectors and the large 57-pin CPC connector. Each of the stage connectors have 4 ground connections and 2 +5V connections. Each of the secondary encoder connectors have 1 each +5V and ground connections. All of these wires run from the large terminal strips on the Galil plate to the connector on each of the AMP-1140 amplifier panels.