Phoenix Contact

Non-incendive Barriers

Phoenix Contact’s non-incendive barriers use current- and voltage-limiting circuitry to minimize the risk of ignition in hazardous Class I, Division 2 or Zone 2 environments. The PI/NI-2D/24 barrier protects 24-volt digital signals in the event of a short circuit or over-voltage condition. The PI/NI-2I/I version limits the maximum short circuit current to 24 mA in 4-20 mA loops. The units can be installed with two-wire 4-20 mA transmitters.