Sensor power supply

Each channel is equipped with an integrated sensor power supply.

Thermocouples:

Bias voltage for isolating thermocouples

RTD: Constant current supply: 250μA …. . 1mA

Voltage: 4V

Power supply

Redundant power supply via two power inputs (decoupling diodes).

At least one power input is required for module power supply.

Supply voltage: 24 (18…. .31.2) VDC according to IEC 654-2; class DC4

Power consumption: max. 8 W

Control inputs

All channels have two logic binary inputs for the following two functions:

Reset of the maximum measured temperature

Reset latching relay

Limit blocking

The control inputs are designed for 24V logic (active low input)

Low level: 0…. .3V; high level: 13…. .48V

Input resistance: ≥30 kΩ

Current output

Nominal range:

0/4… .20 mA or 20… .4/0 mA

Open and short circuit protection

Permissible load ≤ 500 Ω

Resolution 16 bit

Optocoupler outputs

Six collector/emitter outputs

Uce = 48 VDC

Ice = 100 mA