After releasing the simulation key) – KROHNE OPTISWITCH 3100C NAMUR EN User Manual

Page 23

(after releasing the simulation key)

Sensor cur-

rent

Level relay

ampliﬁer -

overﬁll pro-

tection

Level relay

ampliﬁer -

dry run

protection

Signal lamp

ampliﬁer -

overﬁll pro-

tection

Signal lamp

ampliﬁer -

dry run

protection

Signal

lamp -

sensor

1. Low Current

(approx. 3 s)

approx. 1 mA energized

currentless

2. High Current

(approx. 1.5 s)

approx.

2.2 mA

currentless

energized

3. Return to the actual op-

erating condition

Note:

When used in measuring chains according to IEC 61508,

mode B (dry run protection) is not permitted.

You can carry out the function test with the outputted current

values also directly with a safety PLC or a process control

system.

Test procedure

OPTISWITCH 3100 C - with NAMUR output

Set up

31356

-EN

-060830