When signal loss or control hiccups slow down a line, the first question is whether the problem is in the wiring or in the input module. For anyone working with control cables, connectors, and I/O components, two very different parts often show up on the same list: the Klockner Bartelt 500081-6 Industrial Control Cable Assembly and the Honeywell NOVAR Opus XIO-8CTI-B Remote I/O Module with CT. One is a cable assembly meant to carry control signals; the other is a remote I/O module built to read current transformer inputs. Choosing between them starts with identifying the failed part, then weighing a lower-priced used cable against a new, more specialized module.
Quick verdict
If you need to replace a control cable assembly and a used part is acceptable, the Klockner Bartelt 500081-6 at $159.99 is the straightforward pick. If your system requires a new remote I/O module for current transformer input, the Honeywell NOVAR Opus XIO-8CTI-B at $284.88 is the better fit because it is new and clearly specified as a current transformer input module.
At a glance
| Product | Listed price | Condition | What you get |
|---|---|---|---|
| Klockner Bartelt 500081-6 Industrial Control Cable Assembly | $159.99 | Used | Industrial control cable assembly for pneumatic, hydraulic, electronic, and electrical control equipment |
| Honeywell NOVAR Opus XIO-8CTI-B Remote I/O Module with CT | $284.88 | New | Current Transformer Input Module rated 22-28VAC 50/60Hz, model XIO.80CT |
Where each product wins
- Choose the Klockner Bartelt 500081-6 when your need is a control cable assembly and you want to spend less on the wiring element.
- Choose the Honeywell NOVAR Opus XIO-8CTI-B when the job calls for a new current transformer input module and you want a part that is both new and specifically identified.
- The cable assembly is used; the module is new in original packaging, so the module carries less uncertainty about previous service.
Product notes
Klockner Bartelt 500081-6 Industrial Control Cable Assembly

The Klockner Bartelt 500081-6 is the wiring-focused part when the missing piece is the cable itself. Its role as an industrial control cable assembly covers pneumatic, hydraulic, electronic, and electrical control equipment, which gives it a broad fit for control circuits. The main compromise is condition: it is a used part, so it comes with service history rather than the freshness of new packaging. That means it makes sense when you need a cable assembly for a control loop and can accept prior service life. If the project requires a current transformer input module instead, this cable assembly does not fill that role.
Honeywell NOVAR Opus XIO-8CTI-B Remote I/O Module with CT

The Honeywell NOVAR Opus XIO-8CTI-B is the more specific pick for a current transformer input job. It is new and in original packaging, and the type label says Input Module Current Transformer with a 22-28VAC 50/60Hz rating and model XIO.80CT. That gives you a clear part identification for a remote I/O module rather than a generic wiring piece. The limitation is its narrower purpose: it is not a control cable assembly, so it cannot repair a damaged cable in the loop. For installations where a new remote I/O module is the required component, this is the option that fits.
Final choice by use case
Choose the Klockner Bartelt 500081-6 when your control loop needs a replacement cable assembly and you are comfortable working with a used industrial part. Choose the Honeywell NOVAR Opus XIO-8CTI-B when the project calls for a new remote I/O module with current transformer input capability and you want a part that is new and clearly specified for that role. The first is about restoring wiring; the second is about installing a clearly specified input module.