The unit is offered with PLC or standard electric relay
Basler Electric, Basler Electric Relay
Application School--Reclosing; 1998
In order to keep the signal from fading over long lengths of wire, he made use of the electric relay
invented by Henry (see 1823) in 1835.
Request of international offers to supply electric relays
required for the overhauling and maintenance of the French made metro trains operating on Cairo Metro first line.
Casio Computer Co., Ltd., was established in 1957 with the successful development of the world's first fully electric compact relay calculator, the Casio 14-A, which used electric relays
in place of the mechanical gears which were the norm at the time.
Hoffman organized nearly 1,000 transit workers and put them on the enormous job: Hundreds of electric switch boxes were covered in muck and had to be hand-cleaned, electric relays
needed to be replaced, mud needed to be removed from under the third rails by hand.