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SLC 500 controllers continue to operate (hold-up) for a short period of time if the input voltage to the power supply drops below the recommended operating voltage range. The controller continues to scan the user program and control I/O during this time. CPU hold-up for each power supply is shown on pages 14 and 16. SLC 500 controllers turn OFF (stop scanning and disable outputs) if input voltage to the power supply is removed or drops below the recommended operating range for a period exceeding the CPU hold-up time. The controller resumes operation automatically when the input voltage is restored to normal. If the input voltage to the 1746-P7 power supply falls into a range of 4 to 9V for a period exceeding the CPU hold-up time, the controller turns OFF and will not turn back ON until input voltage is increased to 11V dc.
Recommended Products:
1771-NA |
1771-NA01 |
1771-NAK |
1771-NAK1 |
1771-NAK3 |
1771-NAK7 |
1771-NAX |
1771-NB4S |
1771-NB4T |
1771-NBRC |
1771-NBSC |
1771-NBTC |
1771-NBV1 |
1771-NBVC |
1771-NC15 |
1771-NC6 |
1771-NIS |
1771-NIV |
1771-NIV1 |
1771-NIVR |
1771-NIVT |
1771-NOC |
1771-NOV |
1771-NR |
1771-NT1 |
1771-NT2 |
1771-OA |
1771-OAD |
1771-OADK |
1771-OAN |
1771-OBD |
1771-OBDK |
1771-OBN |
1771-OD |
1771-OD16 |
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We are the supplier for industrial automation spare parts.We specialize in PLC module, DCS card pieces, ESD system card pieces, vibration monitoring system card pieces, steam turbine control system module, gas generator spare parts, we have established the relationship with famouse PLC DCS product maintenance service providers in the world.
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Rockwell Allen-Bradley:
SLC500: 1747/1746 series
MicroLogix: 1761/1763/1762/1766/1764 series
CompactLogix: 1769/1768 series
Logix5000: 1756/1789/1794/1760/1788 series
PLC-5: 1771/1785 series
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