Product Description

The Keyence ES-M2 is a compact, NPN-type expansion amplifier designed to extend the functionality of Keyence's inductive proximity sensors. Utilizing a one-line expansion system, it allows multiple sensors to share a single amplifier, reducing wiring complexity in large-scale installations. The ES-M2 features a 25-turn sensitivity adjustment for precise tuning and offers both Normally Open (N.O.) and Normally Closed (N.C.) operation modes, selectable via a switch. It includes a 10-ms delay timer function, enhancing response accuracy in dynamic environments. With an IP67 enclosure rating, the amplifier is suitable for use in harsh industrial conditions, operating within a temperature range of 0 to +50°C and a relative humidity range of 35% to 85% (non-condensing). Its compact size and robust design make it an ideal choice for applications requiring reliable and efficient proximity sensing solutions.​

Technical Specifications

• Model: ES-M2
• Type: NPN Expansion Amplifier
• Operation Mode: N.O./N.C. (switch-selectable)
• Timer Function: 10-ms delay / Timer OFF switchable
• Output: NPN open collector, 100 mA max., 40 V max., residual voltage 1 V max.
• Disconnection Alarm Output: Not available
• Response Time: 1 ms max.
• Sensitivity Adjustment: 25-turn trimmer
• Temperature Characteristics: Within ±8% of detecting distance at 23°C when within 0 to 50°C temperature range
• Protection Circuit: Reverse power connection protection, output overcurrent protection, output surge protection
• Power Supply Voltage: 12 to 24 VDC, Ripple (P-P) 10% or less
• Current Consumption: 25 mA max.
• Ambient Temperature: 0 to +50°C
• Relative Humidity: 35 to 85% RH (No condensation)
• Weight: Approx. 35 g (including nuts and 2-m cable)​