UL 7/8'' power connectors for industrial automation ...
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UL 7/8'' power connectors for industrial automation ...

Mar 24, 2023

binder in Germany has launched a series of 7/8" circular connectors with UL approval to provide the power supply of components and devices in automation technology

Designed as 3-, 4- or 5-pin variants, the connectors have screw clamp termination as well as pre-assembled cable connectors with straight or angled cable outlet are available. The products equipped with reliable screw locking to meet the conditions of protection degree IP67 – the overmolded cables even IP68 – and have UL certification for use on the North-American continent.

The connectors support up to 13 A in the 3-pin version with a rated voltage of 300 V, or 600 V according to UL guidelines for sensor technology through bus applications to lighting installations. Practical examples include drive or lighting technology and the electrical connection of heating devices.

A mating face unified across all manufacturers to the NFPA/T3.5.29 R1-2007 quasi-standard ensures flexibility in application and provides security in procurement.

The main purpose of these devices is to simplify the wiring of complex field installations. As such, they are considered key components of rugged decentralized automation solutions, but require equally robust connection technology.

7/8" connectivity has its origins in the late 1960s in the US as a standard interface for sensor technology – a field of application that is dominated today by M12 connectors. With robust 2-mm-diameter contacts, the range of uses for 7/8" technology has shifted; today it is mainly established in the power supply of components and devices in automation technology.

For power supply applications in the automation environment, binder offers various ready-to-connect, pre-assembled and overmolded cables: in straight and angled versions, in different lengths and with stainless-steel cable screw connections for use in corrosive ambient conditions. Field-wireable products, on the other hand, allow greater flexibility in the choice of cable materials and lengths. The screw termination inside ensures a cost-efficient, detachable connection.

Cables with diameters from 6 mm to 12 mm can be connected; possible wire gauges range up to 2.5 mm². Gold-plated contacts and stainless-steel variants ensure a long mechanical service life at low contact resistances, especially for use in industrial environments.

Users who require 7/8" technology for installation in device housings can choose from binder's flange connectors with various thread designs. On the termination side, there is a selection of pre-assembled wires in various lengths as well as dip solder contacts for mounting on a printed circuit board.

The binder portfolio also extends to products for the CAN-based DeviceNet fieldbus with additions such as the 870-series T distributors in different pin counts, which are capable of supplying two loads simultaneously from one source.