Pepperl+Fuchs Blog

Connecting Field Devices to a Type X Purge System

Posted by Chris Romano on Wed, Nov 12, 2014

Pepperl+Fuchs' 6000 Series Type X purge system has a new intrinsically safe termination board and cable harness kit that makes it much easier to wire field devices to the 6000 Series purge system. The kit includes an IS termination board that is DIN-rail mounted, and a wire harness that can be ordered in three different lengths. Custom lengths are also available. The video below shows you what's in the kit and the steps to take to connect it properly.



Chris: Welcome to Pepperl+Fuchs' presentation of the 6000 Series purge and pressurization system IS termination board and cable harness. My name is Chris Romano and I am the Product Portfolio manager for Purge and Pressurization here at Pepperl+Fuchs. Today we're going to talk about the 6000 Series component kit, where you have all the individual components and you need to wire up the field devices to the 6000 Series component. It can be kind of tricky if you don't have the right type of wiring and harnesses. There are multiple wires that need to get inside the EPCU that is housed in an explosion proof enclosure. Today we're going to talk about an easy way of doing this, so let's get started!

When you order a 6000 Series component kit,  you get several components with it to utilize in a purge and pressurization system. For example, you have the explosion proof enclosure that houses the EPCU. Now this is the brains behind the purge and pressurization system for the 6000 in a Type X purge system. So inside here you have the EPCU with terminals for power and contacts ouputs, and then all your field devices that come in. Along with the component kit, you get the user interface, the solenoid valve with some mounting hardware, some additional mounting hardware with cabling, and a manual on how to operate the system.

The problem is, with the component kit, all this field device wiring, from the IS termination board, the solenoid valve, the vent, and any type of inputs you have coming in, have to come in through this cable gland, and have to terminate onto these terminals. The enclosure is explosion proof, so you have to have an explosion proof seal on here.

In the past, we have used this type of device where you can get the IS termination board with this cable harness. You had to order the cable to a length specific to your application. It wired right on the terminals and terminated onto the Ex d box. It was very hard to mount the IS termination board because it wasn't really designed to be panel mounted into an enclosure. So what we did was, we eliminated that device from the component kit, and went with an IS termination board which is DIN rail mounted and a wire harness which comes in three different lengths:
[] .3 M
[] 1 M
[] 2 M
[] Custom lengths are also available

The way the new component kit works is, you would mount the DIN rail mounted IS termination board inside the customer's enclosure or in some type of protective enclosure. The IS termination board has removable terminators, to allow for easy termination of the long end of the wiring harness termination cable. The individual wires are color coded so that you can follow the specific color codes found in the data sheet, or you can also use your own. If you use your own, you have to make sure that whatever you do with the IS termination board, you have to repeat in the EPCU. Once the cable is terminated, then you can screw the other end into the enclosure. Pull the wires through the cable gland to screw it in. You have to have at least five threads to maintain the explosion proof integrity of the unit. You would remove the EPCU terminal and then again wire this up according to the color codes so that the EPCU terminal matches the IS termination board terminal.

Now note that on the IS termination board you have information showing in what position the field devices are, and that detail is also shown on the EPCU. The only thing you have to do is be sure that the wires and positions of the field devices match up. Once that is done then you have  your complete connections for your field devices back to the EPCU. This makes it a little bit easier to mount this component kit and to use this component kit in any type of application. Again, the IS termination board is intrinsically safe. It has to be mounted in at least an IP54 rated or NEMA 4 enclosure.

The 6000 Series IS termination board model number is 6000-ISB-01

The cable harness, which comes in three lengths, has the following model numbers:

[] .3 M length - 6000-CBLA-ISB-030
[] 1 M length - 6000-CBLA-ISB-100
[] 2 M length - 6000-CBLA-ISB-200

Again, if you want a custom length for the cable harness, that can also be accomodated. Just keep in mind that special orders will be a little bit longer in terms of a delivery date, about two to three weeks, and it will cost a bit more as well. The standard IS termination board and cable harness will be in stock. Along with the IS cable gland you will get four of these intrinsically safe wiring tags to identifiy the cable harness and cable gland as intrinsically safe.

Questions about Purge Systems? Get the Engineer's Guide

Topics: Purge/ Pressurization Systems

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