Home > Encoder cable solves EMI problems

Encoder cable solves EMI problems

Supplier News
article image Employs fibre optic technology within the cable assembly but it looks and functions like a standard electrical encoder cable.

MICRONOR, represented in Australia by Quality in Control , has released the MR121 ZapFree encoder cable, solving encoder communications problems caused by EMI, RFI and ground loops commonly found in woodworking, metalworking and other fabrication plants incorporating heavy machinery and large ac motor drives.

The product uses Micronor's ZapFREE technology, which employs fibre optic technology within the cable assembly but it looks and functions like a standard electrical encoder cable. The equipment operator simply disconnects the existing controller-to-sensor connections and replaces them with corresponding MR121 encoder cables. No engineering redesign is required or needed.

Inside the cable assembly the encoder's output signals (incremental A/B/M or absolute SSI interface) are converted from electrical-to-optical (E/O), transmitted optically to the opposite end via optical fibers contained within an industrial-grade hybrid cable, and then converted back from optical-to-electrical (O/E) at the controller end. The hybrid cable also incorporates six electrical lines which provide for direct end-to-end transport of the non-critical power, ground, sense and fault paths. The internal O/E and E/O converters tap a minimal amount of current off the electrical power lines to drive the internal converters, all of which is contained within the backshells of the electrical connector ends.

Besides optical fibre's natural resistance to EMI/RFI, ZapFREE takes advantage of fibre's low loss over distance. Low transmission loss allows separation of controller and a remote sensor to distances exceeding 1000m.

682AP MORE ONLINE

Quality in Control 07 5533 5367.

Newsletter sign-up

The latest products and news delivered to your inbox