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Key Technical Specifications
| Parameter | Specification / Value |
| Operating Principle | Power-to-Lock (Solenoid energized to lock) |
| Solenoid Voltage (U_s) | 24 V AC/DC |
| Contact Configuration | 2 NC / 2 NO (2 NC positive break safety contacts) |
| Enclosure Material | Glass-fiber reinforced thermoplastic, self-extinguishing |
| Holding Force (F_{max}) | 2,000 N |
| Latching Force | 30 N |
| Thermal Test Current (I_{the}) | 6 A |
| Cable Entry | 3x M16 x 1.5 threaded conduit entries |
| Protection Class | IP67 according to EN 60529 |
| Ambient Temperature | −20°C to +60°C (−4°F to +140°F) |
Product Introduction & Supply Chain Strategy
The Schmersal AZM160-22YP is a heavy-duty solenoid interlock safety switch designed for monitoring the position of sliding, hinge, or removable safety guards on industrial machinery. Equipped with a 24V AC/DC solenoid generating up to 2,000 N of holding force, it ensures that protective doors remain locked during dangerous machine cycles. Its 2 NC / 2 NO contact arrangement integrates seamlessly with dual-channel safety relays or safety PLCs to satisfy ISO 13849-1 (Category 4 / PL e) safety system requirements.
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. Refurbished safety switches present severe hidden risks: internal contacts often suffer from invisible arc erosion, micro-fractured actuator cams, or worn solenoid coils. Saving $100 on a refurbished safety switch can lead to catastrophic failure, resulting in worker safety hazards, severe regulatory fines, and tens of thousands of dollars in unplanned downtime. Purchasing New Surplus guarantees 100% mechanical integrity, a 10-to-15-year operational lifespan, and a valid 1-year warranty.
AZM160-22YP
AZM160-22YP
Installation & Configuration Guide
1.Pre-Installation Setup and Safety:LOTO & Safety Isolation.
Verify machine power is locked out and tagged out (LOTO). Attach a grounded anti-static wrist strap during wiring prep. Confirm that the auxiliary control supply voltage matches the 24V AC/DC requirement of the AZM160-22YP solenoid coil.
2.Removing the Legacy Switch:Tag Wires & Remove Actuator.
Unscrew the enclosure cover to access the terminal strip. Label each wire connected to the NC safety circuits, NO signal circuits, and solenoid terminals (A1/A2). Disconnect the wiring, unbolt the switch body, and remove the actuator key from the guard door.
3.Mounting and Wiring the New Switch:Mechanical Alignment & Wiring.
Mount the new AZM160-22YP body onto the machine frame using M5 tamper-proof screws. Align the matching actuator key on the guard door to enter the insertion slot cleanly without binding. Connect the 2 NC / 2 NO contacts and 24V solenoid lines strictly to terminal labels, ensuring M16 cable glands maintain IP67 sealing.
4.Power-On & Safety Verification:Functional Safety Check.
Energize the 24V control circuit. Verify that closing the guard door allows the solenoid to actuate and lock the mechanism. Confirm that the safety circuit closes (allowing machine start) only when the guard is closed and locked, and that de-energizing the lock signal immediately trips the safety relay.
Firmware/Software Versions & Upgrade Notes
- Operating Nature: Pure electromechanical safety device with integrated solenoid coil; operates without software, firmware, or fieldbus parameter configuration.
- Safety Relay Integration: Compatible with all standard 24V safety monitoring relays (e.g., Schmersal SRB series, Siemens 3SK, Allen-Bradley Guardmaster) and safety PLC digital inputs.
- Wiring Caution: Ensure positive-break NC contacts are wired into the primary safety circuit loop (Terminals 11-12 and 21-22). The NO contacts are designated solely for status monitoring/PLC diagnostics, not for primary safety shutdown functions.
Frequently Asked Questions (FAQ)
Q: Is this AZM160-22YP interlock switch brand new or refurbished?
A: This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. It is an authentic Schmersal component in factory-original condition with zero mechanical wear on internal contacts or cam mechanisms.
Q: What does the “YP” suffix mean on the AZM160-22YP model number?
A: The “Y” designates internal wiring/contact arrangement variants specific to the series, while “P” indicates the Power-to-Lock principle (locking is achieved by applying 24V AC/DC to the solenoid, and unlocking occurs when power is removed).
Q: Why shouldn’t I buy a cheaper refurbished safety interlock for my plant?
A: Safety components carry zero margin for error. Refurbished switches often suffer from degraded internal return springs or weakened solenoid insulation caused by prior heat exposure. If a safety interlock fails closed, it jeopardizes operator safety; if it fails open, it causes unexpected production line trips. Paying 20–30% more for New Surplus guarantees OEM reliability and eliminates liability risks.
Q: Does this unit come with the actuator key included?
A: Actuators for Schmersal safety switches are typically sold separately to accommodate different guard configurations (straight actuator, flexible actuator, or hinged door actuator). Check your existing installation or order the specific actuator geometry (e.g., B1, B6) required for your door setup.
Q: What warranty and quality verification are provided?
A: Every unit passes physical, continuity, and solenoid operation checks before dispatch. All New Surplus purchases include our standard 1-year functional replacement warranty.
