SDV144-S13/B4D00  Digital I/O Modules (for FIO)

If SDV144 field wiring diagnostic functions are used, the following diagnostic elements should be installed for individual channels in the vicinity of the field equipment:
• SCB100 (for defective open circuit detection while accepting off signals) (*1)
• SCB110 (for defective short-circuit detection while accepting on signals) (*2)
*1: Input signals are normally off while in normal operation.
*2: Input signals are normally on while in normal operation.
When the input signals are normally off while in normal operation, connect the SCB100 in parallel with the contact output of the field equipment as given below.

*1: These voltages show the case using the field power supply floating. When the field power supply is grounded, the system (functional) ground is connected to the field ground, which is not isolated. For the higher noise immunity, floating the field power supply is recommended.
*2: When the withstanding voltage of the field power supply between the secondary side and the ground is lower than the value shown in the table above, these voltages are adopted as the withstanding voltage of the field power supply.
*3: Number of output channels which a user can use and maximum load current are restricted in case of SDV531-LC. Refer to “ProSafe-RS Outline of I/O Modules (for FIO)” (GS 32P06K60-01EN).
*4: External power supply of SDV531-S style code S1 and S2 is 24 V DC ± 5%.
*5: Do not exceed this value, including the case of inrush/variation of the load current.
*6: Resistance value of the load for both ON and OFF state, including the field wiring resistance.
*7: When connecting SDV531 and SED4D terminal board using AKB331 dedicated signal cable, the withstand voltage is 500 V AC (between output signal lines and system). If MIL connector cables are used, the withstand voltage depends on their cable’s electrical specifications.
*8: AKB651 can be used for connection with SDV531-L only