Spectrum Controls 1746sc-INI4vi - Manual (Page 6)

ii SLC 500 ™ Isolated Analog Input Modules
Maintaining Your Module
And Ensuring Safety
Chapter 7
Preventive Maintenance ............................................................................. 47
Safety Considerations ................................................................................ 47
Verifying Calibration Appendix A
Recommended Schedule .......................................................................... 49
Verifying Current Inputs ............................................................................. 49
Verifying Voltage Inputs (-INI4vi only) ........................................................ 50
Service ....................................................................................................... 50
Index ....................................................................................................... 51
Figures Figure 1. Wiring diagrams (showing differential inputs). ............................ 16
Figure 2. Wiring schematic for 2-, 3-, and 4-wire analog inputs ................. 18
Figure 3. Wiring schematic for single-ended analog inputs ........................ 18
Figure 4. Image table for your isolated analog input module ..................... 20
Figure 5. Channel update time and full-scale step response time ............. 21
Figure 6. Signal attenuation with 50 Hz input filter ..................................... 23
Figure 7. Signal attenuation with 60 Hz input filter ..................................... 24
Figure 8. Signal attenuation with 250 Hz input filter ................................... 24
Figure 9. Signal attenuation with 500 Hz input filter ................................... 25
Figure 10. Graph of signal value vs data value .......................................... 34
Figure 11. PID control example. ................................................................. 39
Figure 12. Programming for PID control example. ..................................... 40
Figure 13. Data table for PID control example. .......................................... 40
Figure 14. User-defined scaling example. .................................................. 41
Figure 15. Programming for user-defined scaling example. ....................... 41
Figure 16. Data table for user-defined scaling example. ............................ 41
Figure 17. LED block .................................................................................. 45
Figure 18. Problem resolution flowchart .................................................... 46
Tables Table 1. Related Allen-Bradley documentation ............................................ 4
Table 2. Electrical specifications—module ................................................... 8
Table 3. Electrical specifications—inputs ..................................................... 9
Table 4. Physical specifications .................................................................. 10
Table 5. Environmental specifications ........................................................ 10
Table 6. Backplane current consumed ....................................................... 12
Table 7. Input module terminal block connections. ..................................... 17
Table 8. Cut-off frequency, step response time, & effective resolution ....... 22
Table 9. Channel update time .................................................................... 23
Table 10. Auto-calibration time per channel ............................................... 25
Table 11. Channel enable and disable times. ............................................. 25
Table 12. Module ID codes ......................................................................... 27
Table 13. Input channel configuration word (O:e.0 through O:e.3) ............. 29
Table 14. Data format definitions ................................................................ 31
Table 15. Input channel status word (I:e.4 through I:e.7) ........................... 36
Table 16. LED definition ............................................................................. 45