Allen-Bradley 440N-Z21S16H Guardmaster Sipha Non-Contact Safety Switch
$123.00
$320.00
Description
Allen-Bradley 440N-Z21S16H Guardmaster Sipha Non-Contact Safety Switch
The Allen-Bradley 440N-Z21S16H, also cataloged as the 440N-Z21S16H Guardmaster Sipha safety switch, provides coded non-contact guard monitoring through magnetic sensing and dedicated control-unit supervision.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 440N-Z21S16H |
| Brand | Allen-Bradley Guardmaster |
| Series | Sipha |
| Type | Non-contact magnetically coded safety switch, sensor and actuator set |
| Housing Material | Red ABS plastic |
| Sensing Distance (Make) | Approx. 5 mm to 10 mm |
| Break Distance | Approx. 12 mm to 15 mm |
| Contacts / Outputs | 1 NO + 1 NC magnetic switch contacts |
| Connection | Approx. 3 m pre-wired cable, 6-core; M12 connector may apply to specific sub-variants |
| Operating Temperature | -10 deg C to +55 deg C |
| Enclosure Rating | IP67 |
| Operating Voltage | Low-voltage signal circuits connected to a Sipha Control Unit; 24 VDC systems cited |
| Safety Integrity | Up to SIL 3 / PLe depending on complete system configuration |
Magnetically Coded Safety Switching
The Sipha sensor uses magnetically coded non-contact operation and requires its designated actuator for switching.
The coded arrangement provides resistance to simple actuator substitution and unauthorized defeat during guard monitoring.
The switching element provides one normally open and one normally closed magnetic contact for status monitoring.
The sensor interfaces with a dedicated Sipha Control Unit rather than functioning as an independent safety controller.
Frequently Asked Questions
Q: Does the 440N-Z21S16H directly provide a safety-rated control function?
A: No. The sensor provides magnetic switching contacts, while safety evaluation depends on the associated Sipha Control Unit and complete system configuration.
Q: What operating distance should be maintained between the sensor and actuator?
A: The supplied data specifies approximately 5 mm to 10 mm for make operation and 12 mm to 15 mm for break operation.
Q: Is the 440N-Z21S16H suitable for exposed industrial installation?
A: The supplied enclosure specification is IP67, with an operating temperature range of -10 deg C to +55 deg C.
Field Installation Guidelines
- Mount the sensor and actuator with their sensing faces correctly aligned according to the applicable Sipha installation documentation.
- Maintain the specified switching and release distances throughout the complete guard movement.
- Secure the sensor and actuator against mechanical displacement, vibration, and unauthorized adjustment.
- Route the signal cable separately from high-voltage power conductors and switching-current wiring where practical.
- Avoid sharp cable bends, excessive mechanical tension, and unsupported cable sections near the sensor connection.
- Connect the NO and NC contacts according to the designated Sipha Control Unit circuit configuration.
- Do not apply supply voltage directly to the switching contacts unless permitted by the associated control-unit specification.
- Terminate cable shielding according to the control-system grounding scheme when shielded wiring is used.
- Verify guard alignment, switching state, cable continuity, and control-unit diagnostics after installation.
- Confirm the complete safety function, including the control unit and final switching elements, before placing machinery into service.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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