20
16-03
16
Functional Safety KFD2-SR3-(Ex)2.2S
Operation
Check the settings after the configuration by suitable tests.
Proof Test Procedure
1. Test each input channel individually. The threshold must be between 1.4 mA
and 1.9 mA. The hysteresis must be between 170
A and 250
A.
For normal mode of operation the relay of the corresponding output must
have switched, if the input current is above the threshold. This state is
indicated by yellow LED.
For inverse mode of operation the relay of the corresponding output must
have switched, if the input current is below the threshold. This state is
indicated by yellow LED.
2. Connect a resistor R
SC
(220
) or a resistor R
LB
(150 k
) to the input.
The device must detect an external fault. This state is indicated by red
LED and the relay of the corresponfding output must be de-activated.
3. Test the outputs with a certain current, i. e. 100 mA and a voltage set to
24 V DC. Test that the contatcs of the relais are definitely open, if the relay is
de-activated.
4. Set back the device to the original settings for the current application after the
test.
5. Secure the DIP switches to prevent unintentional adjustments.
Figure 5.1
Proof test set-up for KFD2-SR3-(Ex)2.2S
Usage in Zone 0, 1, 2/Div. 1, 2 only for KFD2-SR3-Ex2.2S.
Zone 0, 1, 2
Div. 1, 2
KFD2-SR3-(Ex)2.2S
Multimeter
(mA)
R
LB
R
SC
Multimeter
(mA)
R
LB
R
SC
Multimeter
(mA)
240 Ω/2.5 W
24 V DC
Multimeter
(mA)
240 Ω/2.5 W
24 V DC
Multimeter
(mA)
240 Ω/2.5 W
24 V DC
Multimeter
(mA)
240 Ω/2.5 W
24 V DC
2+
3-
1+
7
8
9
10
11
12
5+
6-
4+
Fault
Zone 2
Div. 2
Supply -
24 V DC
Power
supply
I supply
Supply
Bus