A range of single phase solid state contactors for use with short wave infrared (SWIR) and Low Temperature Coefficient resistive loads.

Ratings
7100S units offer a cover a current range from 16 to 250amps. The voltage rating can go to a maximum rating of 500 volts.

Inputs
These units, with integral heat sinks, are driven by either DC or AC Logic signals depending on the order code. Also an analogue 4-20mA input can be specified which gives a linear time proportional output. The DC Logic input can be supplied by a Eurotherm REMIO interface unit which can give intelligent half cycle firing to reduce flicker in SWIR lamps.

Fusing
In all cases the output is zero voltage switching. High speed fuses are mounted external to the unit for 100 amps and below, internal above 100 amps. They can be ordered as part of the 7100S order code. Spare fuses or complete fuse and fuse holder assemblies can also be ordered separately.

Alarms
The 7100S has an optional thyristor short circuit and total load failure alarm.

An over temperature shut down is provided for the 250A fan cooled unit. An optional over temperature alarm is also available.

Diagnostic Load Failure detection is an option which alarms on the loss of one or more parallel heating elements (resistive or SWIR). The sensitivity is one out of six. It is auto-setting via a front panel push button.

Digital communications
The MODBUS communications option allows digital control of the unit and interrogation of the alarm and firing status.

International approvals
CE (EN60947-4-3); UL and cUL available up to 63A