Features:
- Thirty-two non-floating 24 V DC inputs use a typical 3 ms qualification delay.
- The module accepts full channel diversity and provides green input-status indication.
- The article is discontinued without a direct replacement.
The order number belongs to the SIMATIC S5-420 input family and must be matched exactly for legacy spares.
Field levels are compared with defined thresholds, then transferred to the S5 process image when the enable path is valid.
Preserve the connector schedule, F+ enable wiring and software address map because no plug-in successor is available.
Apter Power can support exact-model configuration review and quotation for Siemens 6ES5420-4UA12.
Verified resources for Siemens 6ES5420-4UA12:
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Existing S5 machines can collect dense interlock and equipment-feedback signals through one 32-point card.
- Two-wire BERO sensors can use the module supply when their current and wiring meet the specified limits.
- Long field runs can be engineered with the shielded or unshielded cable limits for established installations.
- Voltage thresholds and a short input delay convert contact or sensor signals into the controller process image.
- Thirty-two 24 V DC field states are acquired for classic SIMATIC S5 control and interlock programs.
- The non-floating input arrangement requires the prescribed common reference across all thirty-two digital channels.
- The 24 V DC input front end evaluates field signals against defined low and high thresholds before state transfer.
- Voltages from -33 V to +5 V are treated as low, helping reject inactive or reverse-polarity field conditions.
- Signals from +13 V to +33 V are accepted as high so energized contacts can be recognized reliably.
- The non-floating channel layout must match the SIMATIC S5 rack's shared reference and process-connector wiring.
- Connected 24 V devices must satisfy the defined input resistance and threshold ranges for dependable state detection.
- Because the module was deleted without replacement, migration requires a system-level review rather than a direct substitute.