Keyence SJ-E252A Bar Ionizer | Static Eliminator

Keyence SJ-E252A Bar Ionizer: Extended-Length Static Elimination Solution

Product Introduction

The SJ-E252A belongs to the Keyence SJ-E series of bar-type static eliminators. This standard model delivers reliable corona discharge static neutralization across wide production lines and web processes. Specifically, the unit applies a pulse AC voltage of ±8000 V through 41 tungsten electrode probes. Meanwhile, the Hi-Power I.C.C. method maintains ion balance within ±30 V under recommended operating conditions. Therefore, this extended ionizer bar suits printing, packaging, film converting, and electronics assembly where static charge disrupts quality.

Technical Specifications

The SJ-E252A operates on a 24 to 36 VDC supply with a current draw of 700 mA at 24 V or 500 mA at 36 V. Its corona discharge structure uses shockless resistive coupling, which protects operators from electrical shock. Additionally, the pulse AC voltage application method ensures efficient ion generation. The ion balance of ±30 V is measured at an installation distance of 300 mm or greater with 0.2 MPa air pressure. Furthermore, the unit provides NPN open collector outputs for ion level warning, condition warning, and alarm signaling.

Mechanical and Environmental Parameters

The ionizer features a 2480 mm total length with an effective static elimination range of 2580 mm when mounted at 50 mm distance. Its body materials include ABS, PBT, PP, LCP, PPS, SPS, and SUS for durability in industrial environments. The electrode probes use tungsten for long service life. Besides, the unit weighs 2.50 kg and offers an Rc 1/8 air connection port. Operating temperature ranges from 0 to +40°C with 35 to 85% RH non-condensing humidity. However, this model carries no formal IP protection rating.

Installation Guide

First, mount the SJ-E252A at a distance between 50 mm and 2000 mm from the target surface. Next, connect the air supply to the Rc 1/8 port at a recommended pressure of 0.2 MPa. The acceptable air range spans 0.1 to 0.5 MPa. Then, wire the 24–36 VDC power supply and the control input for static elimination stop. Moreover, the NPN open collector outputs can drive warning indicators or PLC inputs. Finally, verify ion balance after installation using a charged plate monitor.

Packaging List

• Keyence SJ-E252A Ionizer Bar Unit × 1

• Mounting Brackets and Hardware Set × 1

• Air Connection Fitting (Rc 1/8) × 1

• Instruction Manual × 1

• Original Packaging Box × 1

FAQ

Q1: What is the effective static elimination length of the SJ-E252A?
A: The effective length is 2580 mm when the installation distance is 50 mm. This makes the SJ-E252A suitable for wide web or conveyor applications.

Q2: Can this ionizer operate without compressed air?
A: Yes, the unit functions without air, but air purge improves ion delivery and cleaning. Keyence recommends 0.2 MPa air pressure for optimal performance and balance specifications.

Q3: What type of output signals does the SJ-E252A provide?
A: The SJ-E252A offers NPN open collector outputs for ion level warning, condition warning, and alarm. These outputs support 100 mA maximum at 40 VDC or less.

Q4: What is the power requirement for this bar ionizer?
A: The unit accepts 24 to 36 VDC ±10%. Current consumption is 700 mA at 24 V and 500 mA at 36 V. Therefore, a standard 24 V industrial supply is adequate.

Q5: How is the SJ-E252A shipped and what is the delivery method?
A: We ship via Fedex, UPS, and DHL. Each order includes the ionizer bar, mounting hardware, air fitting, and manual in original packaging.