Gent Four channel Mains switching interface (c/w enclosure)

The S4-34404 has four mains switching relay outputs and four monitored low voltage inputs for a Vigilon device loop. Each output provides single-pole changeover contacts, COM, NC and NO, on its own terminal block, TB1 to TB4. The four inputs connect at TB5. An output and its accompanying input can operate together, allowing the unit to switch four circuits while monitoring four contacts. Each output can be assigned to a sector individually. The relay contacts are rated at 16 A at 250 V.

The relay contacts switch an external 230V AC supply to a resistive load. The interface itself takes power from the control panel through the loop at TB6. Cables carrying more than 48V, both live and neutral, need suitable external fuses. Keep output, input and loop cables as far apart as the installation allows. The S4-34401 provides a single mains switching output where only one circuit needs switching.

Each input accepts normally open or normally closed clean contacts, with normally closed contacts suited to fail-safe applications. Use a 10K resistor in series with the contacts and a 10K end-of-line resistor. The input cable run can be up to 50 metres. Inputs can be configured as fire, fault, supervisory or confirmation inputs, with an acceptance delay to filter brief changes of state.

Confirmation pairs an input with an output to monitor the response of external equipment. The input raises a timeout fault if the expected change of state does not arrive within the configured period. Verbose operation also generates supervisory messages as the input changes state; silent operation gives the timeout fault only. Confirmation modes are available across channels 1 to 4.

Configure the input and output circuits with the Gent Commissioning Tool, version 1.28 or later, before connecting the external circuits. Set unused channels to unused. EN panels need Main Controller V4.43 or later and Loop Processor V4.41 or later; BS panels need V3.97 or later on both. Output terminal order is COM, NC, NO on units made after September 2013 and NO, COM, NC on units made before that date. Follow the markings on the fitted terminal blocks.

The unit comes assembled in an ABS V-0 enclosure with a dark grey back box and light grey lid. Eight 10K resistors, one Allen key and seven cable-entry bungs are supplied. It measures 227mm high by 245mm wide by 77mm deep and weighs about 1.1kg. The enclosure has seven top and seven rear 20mm cable entries, nine cable earth points and channel labels inside and outside the door. Flush mounting allows a depth of up to 48mm in a 210mm by 233mm aperture. The mains interface pair operates from -10°C to +60°C, with storage from -20°C to +70°C and up to 95% non-condensing relative humidity at +5°C to +45°C.