VARITECTOR SPC EX and ACT20X

Intrinsically safe circuits to limit energy are used in explosion risk zones. In these circuits, the intrinsically safe signal converters with their galvanic isolation and Exi approved surge arresters provide excellent protection for sensitive control electronics. Lightning strikes and overvoltages in the field on measurement and control cables can lead to explosions.

Surge voltages on the field side of the measurement and control lines can damage the facility. The VARITECTOR SPC EX can discharge surge voltages in hazardous area applications (zone 0, 1 and 2). The pluggable arresters conform the high requirements of the intrinsic safety Exi to the current standards. They also comply with the IEC 61643-21:2008 surge protection product standard and are certified for protection classes D1, C2 and C3.

The ACT20X-HUI-SAO-LP offers an intrinsically safe input for standard DC signals, temperature signals and resistance signals. It also isolates the Ex zone from the safe zone. The 12.5 mm thin module is supplied via the 4 … 20 mA output. The global ATEX, IECEx and cULus Ex approvals allow it to be used throughout the world.

Features:

Space saving

The VSPC EX uses less space in the electrical cabinet – with four binary or two analogue signals in only 17.8 mm width.

Due to the Ex II 1 G Ex ia II C T4…T6 Ga and Ex II 1D Ex ia III T135 °C...T85 °C Da approvals, the surge protection module VARITECTOR SPC EX can be installed in zones 0, 1 or 2 to protect the signals.

Unlimited protection

The VSPC EX products are special, intrinsically safe surge arresters. Low Li and Ci values mean they are not relevant for the entire application's proof of intrinsic safety.

The ACT20X is approved for installation in zone 2 and converts signals from zones 0, 1 or 2 for the controller. The product is approved by ATEX, IECEx, and cULus Ex Div 1.

The signal converter ACT20X-HUI-SAO-LP isolates and converts intrinsically safe signals such as ± 25 mA, ± 28 V, potentiometer up to 500 kΩ, resistance up to 12 kΩ, RTD signals and thermal signals.

The new ACT20X module can be quickly and comfortably configured with vendor neutral FDT/DTM software such as the WI-Manager software. The software also offers monitoring and diagnostic options.