The MTL4521 and the MTL4521L are loop-powered modules which enable a device located in the hazardous area to be controlled from the safe area. They can all drive a certified intrinsically safe low-power load, as well as non-energy-storing simple apparatus such as an LED.

Technical Data

Number of channels

One

Location of load

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

Div. 1, Group A hazardous location

Hazardous-area output (MTL4521)

Minimum output voltage: 13.6V at 48mA

Maximum output voltage: 24V from 180Ω

Current limit: 48mA minimum

Hazardous-area output (MTL4521L)

Minimum output voltage: 11.1V at 48mA

Maximum output voltage: 24V from 232Ω

Current limit: 48mA 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 de-energise the output.

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

MTL4521, MTL4521L