Pepperl+Fuchs KCD2-STC-1.SP Manual page 17

Functional Safety KCD2-STC-(Ex)1(.SP)(-Y1), HiC2025(Y1)
Operation
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.
Step No. Input
Input value (mA)
1 20.00
2 12.00
3 4.00
1
4 23.00
1
5 0
6 12.00
Table 5.1 Steps to be performed for the proof test
1
The output shall detect a fail high or fail low condition.
Active
input
Input sensor
(2-wire Tx
loop powered)
4 mA to 20 mA
Multimeter
Zone 0, 1, 2
Div. 1, 2
Figure 5.1
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.
Output
Output value (mA)
20.00 ± 0.4
12.00 ± 0.4
4.00 ± 0.4
23.00 ± 0.4
< 0.2
Passive
input
Input sensor
(4-wire Tx
externally
powered)
4 mA to 20 mA
3+
4-
1+
2-
Multimeter
(V) (V)
Proof test set-up for KCD2-STC-(Ex)1(.SP)(-Y1)
Output value for
2-wire Tx (V)
15.2 ± 0.4
17.0 ± 0.4
18.9 ± 0.4
14.1 ± 0.4
22.5 ± 0.5
KCD2-STC-Ex1(.SP)
Current source or
Voltage source or
Current sink
6+
5-
9+
Supply
10-
Output value for
4-wire Tx (V)
4.7 ± 0.5
4.7 ± 0.5
4.7 ± 0.5
4.7 ± 0.5
n. a.
Multimeter
(V)
Logic
solver
analog
input
I I
supply supply
24 V DC
Zone 2
Power
Div. 2
supply
17