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Directional Motor Control with COUTs

Luke@ARI 6 months ago in Expansion modules / XA2 • updated by DavidH 4 days ago 5

Hi all,

I'm thinking about controlling a motorized hydraulic pressure relief valve (the motor turns the pressure setting in and out) with two COUTs on an XA2 module. The motor was previously controlled with a couple of digital outputs and relays as an H-bridge. This is more of a XA2 hardware question; are the diodes necessary to protect the high side COUT as shown?:

Obviously only running either COUT A or COUT B at a time.

Or are diodes not needed?:

Thanks,

Luke.

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Answered

Short Circuit Protection on XA2 DOUTs?

Ethan Zeman 3 months ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 3 months ago 1

Pardon me if this information is already readily available but am having trouble finding it.

If the wiring for an XA2 DOUT is shorted to battery is there an internal protection strategy in the module that will protect the XA2 from being damage?

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Digital Out instead of PWM for PULSAR Valves

Barnhart 9 months ago in Expansion modules / XA2 0

Would any problems arise from supplying Parker Pulsar valves with a digital out signal instead of a PWM signal if proportionality is not desired? We're using an XA2.


Would a clamping diode be necessary in this configuration?

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Answered

PWM output wiring

Barnhart 9 months ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 1 month ago 1

Why must a PWM output be wired as shown below in the XA2 manual?


When I've worked with mobile style PLC's in the past: It's just 1 pin for an output that delivers a PWM signal to a solenoid, then the other pole of the solenoid is wired to a common ground.


Why must there be three pins involved for this? Why shouldn't you wire one pole of the solenoids to a common ground (same potential as battery negative)?


Thanks in advance.



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Answered

XA2 DOUT problem

Stefan Hedlund 11 months ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 10 months ago 1

I have encountered a problem with DOUT on XA2 modules. We operate several Parker D1VW (NG6) valve, with multiple XA2 modules. Some DOUT (from different XA2) does not activate the magnet coil, although it looks completely correct when I'm connected to IQAN Design . DOUT = Tru.

We use valve contacts with zener diodes, it works on most DOUT otherwise. I had to change the output to PWM instead and then it works without a problem. Is there any problem with the XA2 modules, or are the Zener diodes that do not work against XA2?

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xa2 voltage drop

Ed Schippers 11 months ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 10 months ago 1

Due to a voltage drop in the system, because of an electric fan switching on, all the voltage inputs give a low error.

The strange thing is that the voltage drop is not so big. it drops from 27 to 22 for only a sec due to the high start current of the fan.

Is this normal, I thought the modules could be used in 12 VDC system also. So the voltage drop should not be a problem.


regards,

Ed

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Completed

XA2 power off D-in impedance

Forrest 2 years ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 2 years ago 2

I have D-in G, pin #38 hooked up to the brake lights of a truck to detect when the brakes are on.


I recieved a report on one truck that the brake lights don't work when the IQAN system is powered off.


Does the impedance change radically when the system is powered down?

the book states 62 kohm pull-down in parallel with 470 pF. I can't imagine that would draw enough power to keep the brake lights from illuminating.


Is this a faulty module? or is this normal and I need to add a large in-line resistor on all trucks in the field wired this way? Are XS2 modules the same way if this is normal?


eta: when I use a multi-meter on another XA2, I get 62K ohms between pin #15 and pin #38, so I am leaning twoards this being a bad module.

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Answered

Odd XA2 voltage readings displayed on MD3

Forrest 2 years ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 2 years ago 2


 

As you can see the Vref and +Bat are a bit off on MOD4.


any ideas?

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Answered

XA2 Temperature Warning Threshold

Ethan Zeman 2 years ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 2 years ago 1

Was wondering what  the temperature threshold is on XA2 units before the internal temp will trigger a warning in the system?

 

 

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Answered

Voltage present when outputs are off

Kevin Arscott 4 years ago in Expansion modules / XA2 • updated by Gustav Widén (System support) 4 years ago 1
We have 24v system that has a siren connected to an output on the XA2 module. This siren takes 24V and draws 30mA. With the output turned off the sounder is emitting a faint siren, im assuming this is voltage and current present for the error checking?

I have measured the voltage and current being drawn with the output off and its 1.3mA @ 5.8v. Is there any reason why we couldn't simply connect asuitable resistor in parallel with the siren to stop this sound being generated?