Recent content by rmore

We have a problem with capacitor failures in the field. Some key information: * The problem occurs at 220V 50/hz locations. No complaints at 120V/60Hz locations. (different manufacturers for 50hz vs 60Hz motor). * This is happening at a number of sites. * Failures occur after running about a...

Thanks for the warning. We are aware of the obsolescence. Assume that the question also applies to UL 60335-2-40. Any advice?

UL 1995 Heating and Cooling equipment (outdoor use)

Is it acceptable to use an IP65 CE rated HMI (24VDC) with a stainless steel enclosure (NAME 4X) in a UL listed product? If so, what needs to be considered in order for this combination to pass muster with UL?

Does anyone have any real-world examples of problems occurring when color LCD touchscreen HMI's are installed in equipment outdoors?

We have a product with a PLC that we are considering for UL listing. There are a number of industrial pressure sensors with 1-5V outputs powered from a fused 24VDC supply. Do we need to use UL registered sensors in order for the products controls system to be listed?

We have a 460VAC 3 Phase DC power supply in a design that has internal fuses protecting the line inputs. We have a 20A D characteristic breaker on the incoming power. Additionally, we have 3A fuses external to the power supply. The installation instructions for the supply state the following...

We build industrial equipment. No military or government contracts.

We are hiring some new employees to do machine wiring and electrical enclosure assembly, as well as, machine testing and troubleshooting. I am looking for ideas to send to our production manager for outside training. The topics would include wiring and cable assemblies, control boxes...

That works. And it's fairly straightforward once the MSG_CIPGENERIC function is properly configured. I am now able to change the Modbus RTU unit addresses from the HMI or via jumpers on PLC inputs. I was also able to use the same method to set the Ethernet IP address. Thanks You!

I am using a Rockwell Micro 820 configured as a Modbus-RTU slave device. Is there a way for the user to change the slave address without giving him access to the application code?

Good idea. I've reposted to the Petroleum Engineering General Discussion Forum. Thanks.

We have a customer in the oil and gas industry that wants us to provide our equipment with “WITSML Communications Protocol via RJ-45 port". Our equipment is controlled by an Allan Bradley Micrologix 1400 PLC with a Modbus port. What is necessary to provide the WITSML protocol that the customer...

IRStuff. Thanks for the response. I will check out the standard from Energetics. In the meantime, I'm hoping to get some guidance from someone with practical experience with the WITSML protocol being used to transfer data generated by a PLC via it's Modbus port.

We have a customer in the oil and gas business that wants us to provide our equipment with “WITSML Communications Protocol via RJ-45 port" I did some research to determine that WITSML is an XML based protocol and assume that RJ45 port is an Ethernet port. Does anyone have experience...