SBC PCD2 Series User Manual

Saia-Burgess Controls AG
Manual I/O-modules for PCD1 │ PCD2 series │ Document 27-600 – Release ENG09 │ 2019-05-01
5-66
I/O modules PCD1|PCD2
PCD2.W2x0
5
Temperature measurement with Pt 1000
In the temperature range – 50 °C to + 400 °C, the following formulae can be used for
workingtoanaccuracyof±1%(±1.5°C).Repeatingaccuracyissignicantlyhigher.
T=temperature in ° C DV = digital value (0 … 1023)
Example 1: digital value DV = 562
temperature T in ° C ?
DV=digitalvalue(0 … 1023)   T=temperaturein°C
Example 2: preset temperature T = –10 °C
corresponding digital value DV ?
Resistance measurement up to 2.5 kΩ
Specialtemperaturesensorsoranyotherresistancesupto2.5kΩcanbecon-
nected to the PCD2.W220. The digital value can be calculated as follows:
where0≤DV≤1023andR=theresistancetobemeasuredinΩ.
DV=
4092 • R
(7500 + R)
T[° C]=
– 261,8
DV
2.08 – (0.509 • 10
-
³ • DV)
T[° C]=
– 261,8
562
2.08 – (0.509 • 10
-
³ • 562)
= 51.5 °C
DV=
2.08 • (261.8 + T)
1 + (0.509 • 10
-
³ • (261.8 + T))
DV=
2.08 • (261.8 – 10)
1 + (0.509 • 10
-
³ • (261.8 – 10))
= 464

SBC PCD2 Series Specifications

General

Brand	SBC
Model	PCD2 Series
Category	I/O Systems
Language	English