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.

hello, 

i am this XA2 error in one of our 7ech forklifts, the machine is fully operational, but this error keeps on popping up ‘VREF error Value 4.98v’ can anyone explain why?

Hello,

I encountered a strange problem with XA2 module.

For some reason the VREF voltage fluctuate between 5 to 5,5Volts and due to that all the VIN-channels turns on simultaneously around 0 to 30% and the crane moves without touching levers. 

Replacing XA2 module didn't solve the problem.

Is it possible that there could be some grounding issues in VREF circuit or has the MD3 display unit any affect on XA2 VREF circuit?

- Markus

I have a system with a MD3 controlling a XA2 with several relays and solenoids controlled by DOUT channels when certain unrelated circuits are activated the DOUT power pulses continuously as long as the other circuit is activated.  before and after using this other circuit that does not run through the XA2 the unit operates as normal.

what would cause these outputs to pulse?  Their status even changes true/false in the MD3 monitor screen as they pulse. grounding has been confirmed and checked at different locations.

I was forced to change my Pressure Transmitter due to the world-wide supply chain mess.

One that I could get my hands on that looks like it should be able to do the task is the IFM PU1700. I get wild reading from it when read by the XA2, but when I read it with a multi-meter, the voltages are right were I would expect them to be.

Any ideas of what to do? Is there a way to determine what will work and what wont without buying, waiting, and trying? 

This is a two part question regarding the criticality of VREFs for IQAN Modules.  We use an MD4 and XA2 in our system.  On the XA2, we use VREF to support a three axis joystick and one pressure transducer (4 VINs).

We received a report from the field that a short circuit between VREF and ground caused the XA2 module to fail completely resulting in "I/O No Contact" IQAN Error Message on the MD4.

Is this a typical or expected failure mode for an XA2 with a damaged 5V reference voltage regulator?  Or is it more likely there was a mis-diagnosis from the field?  I can't think of a way to validate this without destroying an otherwise healthy XA2.

Would this also be the case in an MC42?

Hi to all

Is it possible to connect the terminal W of the engine alternator to terminal C1:24 "Frequency In" of the XA2?

The diesel engine work at 24V , it is an old engine and don't has the J1939 bus.

XA2 No contact error. The led indications on the XA2 module are fine. All XA2 modules  after this module on the expansion bus has status OK. Could Anyone point out what is going on here Please?

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?

I'd like to have IQAN control be paralleled with switch control. This specific application will be a drop axle. I want the IQAN to drop the axle in certain situations, and have a switch that will drop it at any time, even if the control system is powered down,

I believe I have to protect the module from back-feeding, correct? Will just diode protection be enough or do I need to have the Dout controlling a relay that would toggle the input between the switch and a +bat source?