The Landon Kingsway LK10/421 is a single or duel trip amplifier system designed to operate with our LK10 liquid level sensor, having a 4-20mA two wire current loop. The LK10/421 features an opto-isolator as the interface with the current loop. Two calibrated potentiometers allow the trip values to be set independently of each other, thus high and low or two high or two low level operations may be achieved on a single current loop. Each set point may operate at any level between 5% and 95% of span. Visual indication is in the form of LED’s. Relays offer volt free change over operation with silver cadmium oxide contacts
with a life expectancy of 1×105 operations.
The relays are of totally enclosed plug in pattern. Having single pole changeover contacts rated 5A at 250V AC or 3A at 30V DC. The unit is housed in a grey sealed enclosure with LED’s mounted in the cover to indicate relay operation. The enclosure is sealed to IP65 and is suitable for surface mounting. The unit is available in an enclosure complete with an LK10 and repeater gauge for fill-point installation.
Technical Specification
LK10/420 – 1 relay
LK10/421 – 2 relays
LK10/422 – 2 relays-latching
LK10/423/1 – 1 relay-test buttons
LK10/423/2 – 2 relays-test buttons
Transformer 230vac – 24vdc 500mA
