FEN-31 HTL Encoder Interface ABB Drives

Overview

This chapter states the general safety instructions that must be followed when installing and operating the FEN-31 HTL Encoder Interface. In addition to the safety instructions given below, read the complete safety instructions of the specific drive you are working on. These warnings are intended for all who work on the drive. Ignoring the instructions can cause physical injury or death, or damage the equipment.

General safety instructions WARNING! All electrical installation and maintenance work on the drive should be carried out by qualified electricians only.

The drive and adjoining equipment must be properly grounded. Do not attempt any work on a powered drive. After switching off the mains, always allow the intermediate circuit capacitors 5 minutes to discharge before working on the frequency converter, the motor or the motor cable. It is good practice to check (with a voltage indicating instrument) that the drive is in fact discharged before beginning work. The motor cable terminals of the drive are at a dangerously high voltage when mains power is applied, regardless of motor operation. There can be dangerous voltages inside the drive from external control circuits even when the drive mains power is shut off. Exercise appropriate care when working on the unit.

Overview

This chapter contains a short description of the FEN-31 HTL Encoder Interface.

FEN-31 HTL Encoder Interface

FEN-31 is an interface between the control board and an HTL encoder. It supports various types of HTL encoders. A PTC or KTY temperature sensor can be attached to one of the connections of the FEN-31 interface. FEN-31 offers an RS-422-standard-compliant TTL encoder emulation output and two digital inputs. It also includes cable fault diagnostics for some HTL encoder types. See the drive Firmware manual for details.