Functional Safety KCD2-STC-(Ex)1(.SP)(-Y1), HiC2025(Y1)
Operation
201
8-08
17
Proof Test Procedure
The proof test reveals almost all possible dangerous faults (diagnostic coverage > 90 %).
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 KCD2-STC-(Ex)1(.SP)(-Y1)
Usage in Zone 0, 1, 2/Div. 1, 2 only for KCD2-STC-Ex1(.SP)(-Y1)
For Y1 version only connect the multimeter to terminals 1 and 2.
Step No. Input
Output
Input value (mA)
Output value (mA)
Output value for
2-wire Tx (V)
Output value for
4-wire Tx (V)
1
20.00
20.00
±
0.4
15.2
±
0.4
4.7
±
0.5
2
12.00
12.00
±
0.4
17.0
±
0.4
4.7
±
0.5
3
4.00
4.00
±
0.4
18.9
±
0.4
4.7
±
0.5
4
1
1
The output shall detect a fail high or fail low condition.
23.00
23.00
±
0.4
14.1
±
0.4
4.7
±
0.5
5
1
0
< 0.2
22.5
±
0.5
n. a.
6
12.00
Table 5.1
Steps to be performed for the proof test
KCD2-STC-Ex1(.SP)
6+
5-
3+
4-
1+
2-
Multimeter
(V)
Zone 0, 1, 2
Div. 1, 2
Zone 2
Div. 2
Multimeter
(V)
Multimeter
(V)
9+
10-
I
supply
Passive
input
Input sensor
(4-wire Tx
externally
powered)
Active
input
Input sensor
(2-wire Tx
loop powered)
24 V DC
Power
supply
Logic
solver
analog
input
Current source or
Voltage source or
Current sink
Supply
4 mA to 20 mA
4 mA to 20 mA
I
supply
