F 6217 (0606)
293
Notes to the safety-related operation and use
Screened cables have to be used for the field input circuits, twisted cables are recommended.
If it is sure that the environment of the transmitter up to the module is free from interferences
and the distance is relatively short (e.g. inside a cabinet) then the cabling can be performed
without screened cables or twisted cables. However, the interference immunity of the analog
inputs can only be achieved by using screened cables.
Planning notes for ELOP II
For each input channel of the module exists an analog input value and an appertaining channel
fault bit. With activated channel fault bit a safety-related reaction has to be programmed in
ELOP II related to the corresponding analog input.
Recommendations for the use of the module according to IEC 61508, SIL 3
– Cables for power supply shall be locally separated from the input circuits,
– Application of a suitable earthing must be regarded,
– Measures against rising of the temperature have to be taken outside of the module, e.g.
fans in the cabinet,
– Recording events in a logbook for operation and maintenance.
A maintenance of the module is not required. In case of fault there is a switch-off. The failed
module must be replaced.
Z 7128 Cable plug with transmitter supply
For the supply of transmitters the Z 7128 cable plug with transmitter supply is available (suit-
able only for two-wire connections).
Figure 8: Wiring of cable connector Z 7128
This cable plug may not be used together with zener barriers!
Z 7128
Z 7128
6217
...
Front cable plug
Wiring of cable connector Z 7128
V Analog GND Analog
Z 7128/6217
d
3
0
d
2
6
z
4
d
4
z
8
d
8
x
4
R9
V1 V2
z
4
z
1
2
z
1
6
d
1
6
z
2
0
d
2
0
z
2
4
2
4
4
x
2
0
x
2
4
R6
V3 V4 V5 V6 V7
z
1
6
z
2
0
z
2
8
d
2
8
x
1
6
x
2
8
X
3
2
R4
R12
R5
R13 R14
V8
z
2
4
z
2
8
x
8
z
8
z
1
2
x
1
2
R1 R2
R10
R3
R11
z
3
2
d
3
2
R7
R15
R8
R16
Z
3
2
TTTTTTTT
8
+
–
+
–
+
–
+
–
+
–
+
+
+
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