safety-related, applicable up to SIL 3 according to IEC 61508for current inputs 0/4...20 mA, voltage inputs 0...5/10 V
with safe isolation
resolution: 12 bits
The module contains a redundant, safety-related processor system. Because of this, all thetests are executed directly on the module, The main test routines are
Linearity of the A/D converters
Overflow of the A/D converters
Cross talking between the eight input channels
Function of the input filtersFunction of the l/O bus communication
Notes to the safety-related operation and useScreened cables have to be used for the field input circuits, twisted cables are recommendedif it is sure that the environment of the transmitter up to the module is free from interferencesand the distance is relatively short (e. g. inside a cabinet) then the cabling can be pertormecwithout screened cables or twisted cables. However, the interference immunity of the analooinputs can only be achieved by using screened cables.
Planning notes for ELOP IIFor each input channel of the module exists an analog input value and an appertaining channefault bit. With activated channel fault bit a safety-related reaction has to be programmed inELOP Il related to the corresponding analog input.
Recommendations for the use of the module according to IEC 61508, SIL 3Cables 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. ln case of fault there is a switch-off. The failedmodule must be replaced.
Z 7128 Cable plug with transmitter supplyFor the supply of transmitters the Z 7128 cable plug with transmitter supply is available (suita-ble only for two-wire connections).
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