The MTL5522 is a loop-powered module which enables a device located in the hazardous area to be controlled from the safe area. The MTL5522 can drive a certified intrinsically safe low-power load, as well as non-energy-storing simple apparatus such as an LED. The unit's input/output isolation allows the control switch to be connected into either side of the 24V dc supply circuit.

Technical Data

Number of channels

One

Location of load

Zone 0, IIB, T4–6 hazardous area if suitably certified

Div. 1, Group C hazardous location

Hazardous-area output

Minimum output voltage: 10.7V at 70mA

Maximum output voltage: 24V from 158Ω

Current limit: 70mA minimum

LED indicator

Yellow: output status, on when output active

SIL capable

These models have been assessed for use in IEC 61508 functional safety applications.

SIL3 capable for a single device (HFT=0) when the required function is to deenergise the output.

SIL1 capable for a single device (HFT=0) when the required function is to energise the output.

MTL5522