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
A-10
Appendix
Installation direction and relays contact protection
A
The resistors used must withstand high voltages (pulse stability). With low resist-
ancevaluesinparticular,voltageashoverscanoccuratthegroundhelicalsec-
tion produced in the manufacturing process. For this reason, composite carbon
resistors are often used in screening units. However, enamelled wire resistors or
cement resistors with a large helical pitch are suitable.
Dimensioning guide:
The value for C is the direct result of the switching current. The resistance value R can be established
bydrawingastraightlinethroughthecorrespondingpointsontheIandUcurvesandreadingo󰀨the
resistance at the intersection with the R curve.
Load
Example:
U = 100 V I = 1 A
C is direct result with 0,1 μF
R = 10 Ω(pointofintersectionwithRscale)

SBC PCD2 Series Specifications

General

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