HD688 T Temperature transmitter 4...20mA, 0…20mA, 0…10Vdc for Pt100 sensor with 3-way galvanic separation 3000V. Power supply 12...24Vdc/ac. DIN 2 modules container (35 mm) with rail attachment 35 mm. Five working ranges may be configured by means of a jumper:
(-50°C..+50°C); (0°C..+50°C); (0°C..+100°C); (0°C..+200°C); (0°C..+400°C).

The Temperature transmitter converts the signal coming from a Pt100 sensor into an analogue signal that can be selected by a Jumper among these values: 0÷20mA, 4÷20mA, 0÷10V. The signal is galvanically separated among input, output and power supply. The transmitter is built into a two-module DIN container for 35 mm asymmetric guide..

Output analogue signal: 0÷20 mA,  4÷20 mA, 0÷10 Vdc

The HD 688T transmitter is built inside a 2-module
DIN box for 35 mm asymmetric guide.
The module turns the signal coming from a Pt100 into
an analogue signal that can be sorted out through a jumper connection between 0÷20 mA, 4÷20 mA, 0÷10 V. 

The signal is galvanically separated among input,
output and power supply. 
The 3-way insulation of the module allows the
prevention of reciprocal influences in the
presence of various measuring circuits.

The HD 688T Temperature Transmitter is made up of the following stages:
- input stage including linearization of the curves and equalization of the resistance of the line
cable (3 wires) of Pt100, conversion from voltage into frequency;
- universal output stage through jumper connection, conversion from frequency into voltage;
- power supply stage.
The configuration of the measuring range or the output signal can be modified at any time, an outstanding feature being that any variation does not involve the need to calibrate the transmitter again.

Principal characteristics:
- Galvanic separation among input, output   and power supply
- Pt100 Platinum probe
- Insulation: 3kV at 50Hz for 1 minute
- Scale configurations