Electricity + Control November 2017

round up

DRIVES, MOTORS + SWITCHGEAR

Modular design of WEG Smart Relay offers flexibility

and the device’s internal memory makes it possible to record up to three parame- ter settings or user programmes. The re- lay incorporates a thermal memory circuit which will maintain the motor thermal im- age, even in the event of power loss. This handheld keypad allows engineers to link up to 250 WEG SRW01 smart relays offer- ing great flexibility. TheWEG SRW01 smart relay is available from Zest WEG Group ’s network of branches and representatives.

allows the user to incorporate various pro- tection mechanisms, such as earth leakage and thermal (PTC), in the same relay. The WEG SRW01 supports a range of communications networks including Devi- ceNet, Modbus-RTU, Profibus-DP, and Eth- ernet (2016). The communications modules can be easily exchanged due to the design of the system. TheWEG SRW01 has a USB port for relay monitoring, programming and online back-up through a PC when using WLP software. Rapid system monitoring and relay parameterisation is done via a Human Machine Interface (HMI) keypad,

The modular design of theWEG low voltage electric motor management system offers flexibility by allowing expansion of its func- tionalities. Engineered as a plug and play solution, the compact WEG SRW01 is ide- al for applications where space is limited. It incorporates state of the art technology and network communication capabilities. De- signed for use with power supplies from 24 to 220Vac/dc, theWEG SRW01 has a facility, if selected, to monitor voltage up to 690 Vac and measures current from 0,25 A up to 840 A. The reliability and precision achieved with the WEG SRW01 smart relay makes it suit- able for the toughest industrial applications. Pre-programmed operation modes al- low use in several starting and monitoring configurations; this includes a mode which allows the device to be programmed for an individual application allowing optimum flexibility. The unit provides LED indication for input and output activations status, op- eration mode status, power supply status, and alarm status. The digital input and output functions of the control unit are automatically con- figured as operation mode is selected. The system will also automatically recognise which protocol is in use. The digital inputs can be configured to monitor external digital signals. Using this feature, the out- put contact from an external relay can be connected to the digital input of the smart relay. Significantly, it is this feature that

Enquiries: Kirsten Larkan. Tel. +27 (0) 11 723 6000 or email marketing@zestweg.com

Target pucks for position feedback on quarter-turn actuators

The mounting orientation of the target puck, available from ifm electronic , is recognis- able from the outside. This allows quick and easy mounting on the shaft end of the ac- tuator without the need for further adjustment. The preassembled damping elements reduce installation complexity. The target pucks are designed for shaft heights of 30 mm or 20 mm in combination with an adapter. Rotatable damping elements allow the pucks to be used in both standard and individual position feedback applications. Enquiries:Tel: +27 (0) 12 450 0400 or email info.za@ifm.com

20 Electricity + Control

NOVEMBER 2017