Measures - Siemens SIPROCESS GA700 Quick Start Manual

5.1.5.3

Measures

Measures to suppress sparks
● To suppress sparks via relay contacts, you can use RC elements. In direct current
operation, you can also use a spark killer diode instead of the RC element.
● The RC element results in a drop-out delay for an inductive component, for example, a
solenoid valve. To rate the RC element accordingly, use the following rule of thumb:
– R [ Ω ] ≈ 0.2 x R
– C [μF] ≈ I
● You must use a non-polarized capacitor "C".
● When connecting the RC element, refer to the previous figure/figures.
See also
Overview: Spark suppression for rack-mounted device (Page 59)
Overview: Spark suppression for wall-mounted device (Page 60)
Quick Start
Compact Operating Instructions, 05/2015, A5E31805656-03
[ Ω ]
L
[ A ]
L
Connecting
5.1 Electrical connections
61