The MC41/42/43 looks like a great series of products, but I am reluctant to go with a 3 or 4 master system. When can we expect a series of expansion modules along the lines of the MC41/42/43? or am I stuck with the XA2 indefinately for current outputs?
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?:
I am using a DOUT LS on XC23 to drive a 12V incandescent bulb on an instrument panel. In steady state, the lamp draws 85 mA. I am getting an overload on this output when I try to activate the lamp. I was able to temporarely solve the problem by using a 22 ohms in series with the load. So I believe the problem is the inrush current of the lamp. The instruction book of the XC23 clearly states that the LS DOUT "are designed to drive small loads, e.g. lamps and buzzers". The example even shows a lamp being driven by a LS DOUT.
Can you explain if I'm doing something wrong. If not, is there any fix available to solve this issue ?
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?
I need to drive relays on low side outputs on the XC-23 and MD4-5. Do I need to use relays with included coil protection diodes or if the outputs of these modules are already internally protected ?
I'm wandering if I could use two(2) or more low side outputs in parallel on the XC-23 to increase the carrying current capacity from 300mA to 600mA (2 outputs) or more. I have a relay that I need to drive that needs more than 300mA.
I have a project that uses one MD3 and one XC10. The XC10 sits on its on Expansion Bus CAN line with no other devices except for the MD3. Occasionally, during startup the XC10 will report multiple address.
Currently we tell the customer to power cycle the machine if this comes up and it typically goes away. I am looking into automating this if possible. I have tried a few things and have not had any luck. Is there a way to do a forced reset either on the MD3 and/or XC10 to try and reset the error?
Right now, the XC10's V+ supply is behind a relay so I can cycle it power directly. Testing this method has also not panned out.
MD3 cycle time is at 10ms. I read on a different forum post that the XC10 can only go down to 20ms. Ideally, I want to keep the cycle time as low as possible because of how the machine operates. Would going to 20ms help with the multiple address issue?
Are there any othe XC10 limitations I should know about?
Is there anything else I can experiment with to try and resolve the multiple address without the user’s input?
Why do the XA2 and XC10 manuals call for adding clamping (flyback) diodes to digital outputs?
From what I can gather, the modules are equipped with their own internal clamping diodes. Why would those be disabled for digital outputs?
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?
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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