Overview
The SMC D-Y59B is a solid state auto-switch optimized for pneumatic grippers, cylinders, and rotary actuators. This general-purpose sensor detects actuator position and feeds status to PLCs, relays, and controllers via 2-wire NPN output. The unit features an integrated indicator light for visual confirmation of the optimal operating position, reducing commissioning time and diagnostic overhead in automated assembly, material handling, and industrial controls applications.
Key Features
- Solid state design — no moving contacts, improved reliability and repeatability
- 2-wire NPN output, horizontal detection orientation
- Integrated indicator light for visual position feedback
- Grommet electrical entry with 0.5m in-line lead wire
- Rated for DC24V (DC10–28V nominal range)
- Flex-resistant cable standard — durable in repetitive motion environments
Technical Specifications
- Electrical Output: 2-wire NPN
- Supply Voltage: DC24V (DC10–28V operating range)
- Output Current: 2.5 to 40 mA
- Residual Voltage (ON state): 4 V or less
- Leakage Current (OFF state): 0.8 mA or less at 24 VDC
- Lead Wire Length: 0.5 m standard
- Lead Wire Type: Flex-resistant cable
- Sensing Position: Horizontal
- Mounting Style: Direct mounting or grommet entry
- Indicator Light: Red LED lights when ON
- Operating Temperature: See SMC technical bulletin for range
- Certifications: CE, UL (where applicable)
Typical Applications
- Pneumatic cylinder position feedback for sequential automation
- Air gripper status sensing in robotic pick-and-place and assembly
- Rotary actuator end-of-travel detection
- Material handling conveyor and sorting systems
- Press machine clamp position confirmation
- Industrial test fixtures and inspection stations
Compatibility & Replacements
Compatible With
- SMC pneumatic cylinders (rod-mounted and foot-mounted)
- SMC air grippers (parallel, angular, and rotary)
- SMC rotary actuators
- PLC inputs (24 VDC NPN sink inputs)
- 24 VDC relays and control modules
- Standard industrial automation controllers with NPN logic input support
Replaces / Drop-In Replacement For
- OEM spare part for SMC pneumatic systems
- Verify compatibility with your system integrator before ordering to confirm mounting style and lead wire length requirements
Works With
- 24 VDC control power supply
- PLC programming platforms (Studio 5000, TIA Portal, CoDeSys, GX Works)
- NPN input modules and discrete I/O cards
- Safety relays and control modules accepting 2-wire switch input
