Trip Amplifiers protect hoists and cranes against overload.

Press Release Summary:

Providing dual volt-free relay outputs from load cell signal, LCTA Series Load Cell Trip/Relay Amplifiers offer hoist overload protection, safe crane lifting control, and personnel lifting platform protection. Units can power single load cell or load pin, or up to four 350 Ω load cells connected in parallel. Volt-free relay outputs have trip switching current of 10 A at 230 Vac and can be adjusted independently. For remote display, amplifiers also include 0-5 V analog output.

Original Press Release:

LCM Systems Launches New Trip Amplifier for Hoist, Winch and Crane Overload Applications

LCM Systems, one of the UK’s leading designers, manufacturers and suppliers of load cells and instrumentation is pleased to announce the launch of the LCTA series of Load Cell Trip/Relay Amplifiers developed to provide dual volt free relay outputs from a load cell signal. Aimed primarily at OEMs, this latest product provides a cost-effective, simple to use, yet highly reliable amplifier for applications such as hoist overload protection, crane safe lifting control and personnel lifting platform protection.

The new amplifier module has the ability to power a single load cell or load pin or up to four 350 load cells connected in parallel. The volt-free relay outputs have a trip switching current of 10A at 230vac and can be adjusted independently by simply using a reference voltage to determine the adjustment value. For design engineers who wish to connect the LCTA to a remote display, there is also a 0-5v analogue output. Designers at LCM Systems have also included a shunt facility for regular and easy calibration.

To add to the versatility of this new product, the LCTA can be supplied in a number of mounting options including an IP66 sealed plastic or metal case or ready for DIN rail mounting and has field screw terminal connections.  Also, although the standard product requires a 12/24vdc power supply, there is the option with the DIN-mounted version to power from a 48vac supply.

For straightforward application advice, LCM Systems’ experienced in-house design engineers are only a phone call or email away and can assist with the selection and configuration of the correct module for your application. LCM can also supply, complete with the sensor required, pre-configured, ready for installation.

A free downloadable datasheet is available from the LCM Systems website at


Steve Sargeant

LCM Systems Ltd.

Unit 15

Newport Business Park

Barry Way, Newport, Isle of Wight. PO30 5GY

Tel: +44 (0)1983 249264  

Fax: +44 1983 249266



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