Should Analog Input "SCR" terminal be connected to panel ground?
In the hardware manual of the ACQ580 for example, the attached picture shows that the outer shield is grounded (by using the 360 grounding method on the clamp plate, page 83 in hardware manual), while the internal individual shields are connected to SCR.
My question is, if I am using a single pair cable that has only one shield layer, should I connect the shield to the SCR, to ground, or to both?
I also want to know why SCR is not galvanicaly connected to ground, i.e., if you test its continuity to ground with a multimeter, it does not beep. I also want to know whether or not it should be ever or never grounded.
Thanks,
Zahi
My question is, if I am using a single pair cable that has only one shield layer, should I connect the shield to the SCR, to ground, or to both?
I also want to know why SCR is not galvanicaly connected to ground, i.e., if you test its continuity to ground with a multimeter, it does not beep. I also want to know whether or not it should be ever or never grounded.
Thanks,
Zahi
Asked 8 months ago
Answers
1
Please don't mix 360° grounding method with SCR on the I/O side and AGND
You need at least *two* cables from ACQ 580
one for power to the motor, with 360° ground method
the other for I/O.
- this can have a shield for every function (which may be expensive),
or some "network" cable with screen/shield
- or only one shield for all.
It may be unclear for your, but i.e for the variable resistor
this a two wire cable with shield.
You need at least *two* cables from ACQ 580
one for power to the motor, with 360° ground method
the other for I/O.
- this can have a shield for every function (which may be expensive),
or some "network" cable with screen/shield
- or only one shield for all.
It may be unclear for your, but i.e for the variable resistor
this a two wire cable with shield.
Answered 8 months ago
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