Saia-Burgess Controls AG
Manual for PCD2.W745 and PCD3.W745
│
Document 26-796 E
NG06 │ 2018-10-12
Hardware
1-1
1
Introduction
1 Hardware
1.1
Introduction
1.1.1 General
The PCDx.W745 is a precision analogue input module for temperature measurement
application. Linearization and each kind of compensation as well as conversion into
°C, °F and K are carried out on this module. The module has four input channels,
which can be configured individually.
Supported temperature sensors are:
●
Thermocouples – TC type J, K
●
Resistive temperature detectors – RTD’s type Pt100, Pt1000, Ni100, Ni1000
Further, the module supports all common measurement techniques:
For RTDs:
●
Two wire sensor connection
●
Three wire sensor connection
●
Four wire sensor connection
For Thermocouples:
●
Internal cold junction compensation: The sensors are directly connected to the
module I/O terminal.
●
External cold junction compensation: An external isothermal block can be used.
The temperature of the external junction is measured using channel 0.
The configuration of the four input channels is done by software. Every channel can
be used independently of the others.
Diagnostics:
The module PCDx.W745 provides powerful sensor diagnostics:
●
Overrange detection
●
Underrange detection
●
Line break detection
●
Short circuit detection for RTD’s
Galvanic separation:
The module has galvanic separation between Saia PCD
®
ground and the sensor
interface (500 V
DC
).
