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Functional Safety HiC2853R1, HiC2853R4
Operation
Proof Test Procedure
1.
Prepare a test set-up, see figures below.
2.
Verify the output values as given in table below.
3.
Simulate the sensor state by a potentiometer of 4.7 k
. The threshold must be between 2.1 mA
and 2.8 mA. The hysteresis must be between 170
A and 350
A.
If the input current is above the threshold, the resistive transistor output must have
a low impedance and the voltage output must be enabled (voltage level
higher than 20 V DC). This state is indicated by the yellow LED.
4.
Simulate the sensor state by a resistor R
SC
(220
, short circuit detection) or a resistor R
LB
(150 k
, lead breakage detection).
The device must detect an external fault. This state is indicated by red LED and the outputs
must be in fault state. The resistive transistor output is high impedant (> 100 k
)
and the voltage output is off.
5.
Test the output with a certain voltage (HiC2853R1) or current (HiC2853R4).
Test that the resistive transistor output is definitely high impedant
(see table, I
off
or respectively U
off
)and the voltage output is off, if the yellow LED is off
(voltage level 0 V).
As the unit does not have any switches or settings, no special actions have to be taken in terms
of different configurations. The mode of operation is only interchangeable by the use
of a different sensor (S1N type instead of SN type).
Device
R
U
I
on
I
off
I
fault
HiC2853R1
2 k
24 V
8.0 mA < I
on
< 9.2 mA 0.46 mA < I
off
< 0.62 mA I
fault
< 0.05 mA
Table 5.1 Output values for HiC2853R1
Device
I
U
on
U
off
I
fault
HiC2853R4
10.0 mA
4.58 V < U
on
< 4.85 V
13.3 V < U
off
< 14.35 V
I
fault
< 0.05 mA
Table 5.2 Output values for HiC2853R4