Pilz PSSu E AI SHT2 - Manual (Page 11)

Function Description
Operating Manual PSSu E AI SHT2
1003113­EN­01 11
4 Function Description
4.1 Module features
4.1.1 Function description
The electronic module PSSu E AI SHT2 contains two shunts for scaling an input current I
I0
(connection I0). The two current outputs I
O0
(connection O0+) and I
O1
(connection O1+) are
evaluated by analogue current inputs.
Scaling is applied during evaluation via an analogue input module with an input resistance
of 115 Ohm, (e.g. PSSu E F AI I)
} Scaling factor with resistance R
1
+ R
2
= 10,150 Ohm (connections O0+/O0­):
I
O0
: I
I0
= 1:10
} Scaling factor with resistance R
2
= 6,750 Ohm (connections O1+/O1­):
I
O1
: I
I0
= 1:20
The maximum output variable error at 25 C is:
} When two analogue input modules are connected (e.g. PSSu E F AI I) 1,0 %
} When one analogue input module is connected (e.g. PSSu E F AI I) 3,6 %
Example:
} Input current I
I0
= 200 mA
} Output current I
O0
at R
1
+ R
2
= 20 mA
} Output current I
O1
at R
2
= 10 mA
I 0 O 0 +
O 1 +
0 V
O 0 -
O 1 -
I O1
I O0 I I0
R 1
R 2