PD 643 3-Channel Temperature Input

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PD 643 3-Channel Temperature / 0-100 mV input module Specific Features The PD 643 is an analogue input module with one Pt-100/Pt-1000/thermocouple/ 0-100 mV input channel and two thermocouple/0-100 mV input channels. All inputs can be configured for thermocouple/0-100 mV sensor input. A Pt-100 / Pt-1000 temperature sensor can be connected to channel 1 and may be used as a reference temperature for the thermocouple sensors connected to channel 2 and 3. The thermocouple inputs are floating. The PD 643 provides linearization for the following types of thermocouple transducers: Type R, S, B, J, T, E, K and N. A PD 991 Pt-100 sensor can be very useful if channel 1 is to be used as a temperature reference for thermocouple sensors connected to the channels 2 and 3.

PD 643 Block Schematic

Channel Structure

The PD 643 consists of 4 channels as shown in the table.

Channel No.	Channel Name	Channel Description
0	Service	Device Ident., Address and Config.
1	Analog_1	Analogue Input
2	Analog_2	Analogue Input
3	Analog_3	Analogue Input

Electrical Specifications

Power supply

Power supply DC:

nom.

24.0 V

min.

18.0 V

max.

32.0 V

Ripple voltage:

max.

5 %

Power consumption @ 24V DC

Operation:

max.

25 mA

Current at power up:

max.

60 mA

Analogue input (Ch. 1- 3)

Signal type:

Thermocouple

Input impedance:

> 5 MΩ

Calibration error:

@ Tamb. 20 °C

max. +/- 0.1 % of fullscale

Ambient temperature coefficient Tc:

max.

+/- 100 ppm / °C

Ambient temperature influence (ΔV):

Tc x (Tambient – 20) x input

Resolution:

typ.

20 µV

Update time:

fixed

0.8 s

Voltage to temperature conversion for thermocouples

Supported IEC 584-1 thermocouple types:

R, S, B, J, T, E, K, N

(See data sheet for thermocouple measurements)

Filter for analogue input signal

Type:

4th order low pass

Time constant:

configurable

3.0 s – 50.0 s

Gain error:

max.

+/- 0.1 %

Analogue input (Ch. 1 - 3)
Signal type:		Pt-100 / Pt-1000
Connection:		4-wire / 2-wire
Update time:		Fixed	2.4 s
Input temperature range:		Pt-100 Pt-1000	-100 °C → +600 °C -100 °C → +200 °C
Ambient temperature coefficient Tc:		max.	± 15 ppm / °C
Ambient temperature influence (ΔT):		Tc x (Tambient – 20) x (Tsensor + 273)

Pt-100 Data (excluding sensor)
Calibration error:	@ Tamb. 20 °C	max.	± 0.1 °C
Resolution:		typ.	0.05 °C
Measuring current:		max.	500 µA

Pt-1000 Data (excluding sensor)
Calibration error:	@ Tamb. 20 °C	max.	± 0.2 °C
Resolution:		typ.	0.2 °C
Measuring current:		max.	50 µA

Ambient temperature range

Operating temperature:

-25 °C – 70 °C

Storage temperature:

-40 °C – 85 °C

Humidity

Relative humidity:

max.

95 %

EMC

Immunity:

EN 61000-6-2

Emission:

EN 61000-6-3

Vibration

Test method:

IEC 60068-2-6

Frequency / amplitude:

2-10 Hz: +/- 5.0 mm

10-100 Hz: +/- 2g

Sweep rate:

max. 1 octave/min

Number of axes:

3 mutually perpendicular

PD 643 3-Channel Temperature /

0-100 mV input module

Specific Features

PD 643 Block Schematic

Channel Structure

Electrical Specifications

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