... box ,computer center ,electronic information engine room,vigilance monitor center,fire control center,industry automatic control,frequency conversion device control room,hospital surgery ... 3+NPETRS5 -C series can add remote signal control function TypeTRS4/-140TRS4/-275TRS4/-320TRS4/-385TRS4/-440Max continuous operating ... -35mm2Remote sig terminal: 1.5mm2AccessoniesAddtion remote signal control