20
20
-0
6
16
Functional Safety KFD2-SCD2-Ex*.LK, HiD2038
Operation
Proof Test Procedure
1.
Put out of service the entire safety loop. Protect the application by means of other measures.
2.
Prepare a test set-up, see figures below.
3.
Test the devices. Verify the current values as given in table below.
4.
Set back the device to the original settings for the application after the test.
Figure 5.1 Proof test set-up for KFD2-SCD2-Ex*.LK
Channel II only for KFD2-SCD2-Ex2.LK
Step No.
Set input value (mA)
Set output value
R
load
(
)
Mandatory measuring points
(safety-relevant) output value (mA)
1
20.00
470
20.00
±
0.40
2
12.00
470
12.00
±
0.40
3
4.00
470
4.00
±
0.40
4
23.00
470
23.00
±
0.40
5
0
470
< 0.30
6
12.0
< 30
2.00
±
1.00
7
12.00
> 100000
< 0.30
8
12.00
Restored as step 2
Table 5.1 Steps to be performed for the proof test
KFD2-SCD2-Ex2.LK
Zone 0, 1, 2
Div. 1, 2
Zone 2
Div. 2
Multimeter
(mA )
I
supply
14+
15-
3+
1+
2-
7-
8+
9+
250 Ω
10-
11+
12+
250 Ω
100 Ω
6+
4+
5-
100 Ω
mA
mA
I
II
Multimeter
(mA )
24 V DC
Power
supply
Supply
4 mA to 20 mA
4 mA to 20 mA
4 mA to 20 mA
4 mA to 20 mA
