[Dsg-halla_magnets] Electric valve for CLEO

Steven Lassiter lassiter at jlab.org
Fri Feb 25 08:34:57 EST 2022


Hello Pablo,

 I set up the Electric valve motor on the work bench. I changed the wiring for the motor to match all the way from the motor connector to the relay board. The only difference in wire color is that the brown wire internal to the motor is tied to the green wire.
Drawing 402 need to be corrected for the EV valve. The internal motor connectors are labeled 1-6 not A-G, also the wiring for the position read back should be to be added to that drawing. on the right side.

Be careful in energizing the motor for a long time - There are limits switches on the motor shaft and could be misleading if they are engaged. One may think the wiring or controls or not working but it is just the engagement of the limit switch.

The valve position readback is not working as there is no 510 ohm resistor that converts the 0 to20mA to a voltage for the red lion meter. This 510 resistor also completes the ground path for the 0-20mA for the PLC. Refer to drawing 260 sht 3 for the resistor call out.

thanks
Steven

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