PSR-PC50

105818_en_02

PHOENIX CONTACT

13

14.1

Application example 1 - SIL 3

Assumptions, information, and marginal conditions

–

The DC of the digital output is 90%.

–

Diagnostics of PSR-PC50 are active.

–

The test pulses of the controller are activated and eval-

uated.

–

A potential error is indicated accordingly.

Figure 11

Application example 1 - SIL 3

A fault e.g., open circuit or short circuit of the

load is reported by detuning the test pulse of

the safe controller.

M(N)

K1

0V

24V DC

A1 A1'

M1L

L´

LO LO´

N

N´

NI NI´

A2 A2'

PSR-PC50

L+(L1)

24V DC

DC 90%

SIS

24V

TP1 TP2 TP3

DO

DI