Technical Specifications - Siemens SIMATIC S5 Equipment Manual

Matching Module 1 for Absolute Encoders
Instructions for Conditioning the Input Circuitry
– In the encoder impedance range from 6 kS2 to 10 kQ wire jumpers can be inserted for
RI 03/Rl 04/Rl 05,
– Below 6 kQ encoder impedance, the resistor networks must be computed.
– The high level at R106 or R107 must be between 3 V and 5 V.
– The low level at R106 or R107 must be below or equal to 0.8 V.
+ 24 V
M
(U – U2)
X
U2
Explanation:
R R103, R104, R105
R2
Voltage at R106, R107 (min. 3 V, max. 5 V)
U2
u Encoder voltage (24 V)
R–Encoder : Encoder impedance (see manufacturer's label or encoder data sheet)
How to proceed:
a) Compute the value R max. with U2 minimum (3 V).
b) Compute the value R min. with U2 maximum (5 V).
c) Select the resistor network according to the E series (between R maximum and R minimum).
" See technical specifications, se~tion 8.6.
4 – 4
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– R–Encoder
R 02/92