SJ-E204H Static Eliminator: Bar Type Ionizer Technical Guide
Product Introduction
The Keyence SJ-E204H belongs to the SJ-E series of energy-saving high-speed sensing ionizers. Specifically, this model serves as a bar type main unit with a 2040 mm configuration. Engineers commonly deploy the SJ-E204H in production lines where wide-area static control is critical. Moreover, the device utilizes a corona discharge method to generate ions. Its shockless resistive coupling structure ensures safe operation near sensitive electronic components. The SJ-E204H integrates pulse AC voltage application at ±8000 V. Therefore, it effectively neutralizes static charges across a broad installation distance ranging from 50 to 2000 mm.
Core Value
Firstly, the SJ-E204H delivers exceptional ion balance stability. The Hi-Power I.C.C. control method maintains ion balance within ±30 V under specified conditions. This precision prevents damage from over-compensation or residual charge. Secondly, energy efficiency stands as a primary advantage. The SJ-E series reduces air consumption significantly compared to conventional models. Consequently, the SJ-E204H lowers operational costs while maintaining rapid static decay times. Furthermore, the unit features a robust construction with tungsten electrode probes. This material choice ensures long-term durability in continuous production environments. Meanwhile, the integration of condition alarms and ion level warnings provides real-time diagnostic feedback to the control system.
Technical Insights
The SJ-E204H employs 65 electrode probes distributed along its effective length of 2100 mm. Specifically, the effective length refers to the static elimination range at a 50 mm installation distance. The unit operates on a power supply of 24 to 36 VDC with a current consumption of 700 mA at 24 V. For air-assisted applications, the air connection port uses an Rc 1/8 thread. The recommended air supply pressure is 0.2 MPa, though the device accepts a range from 0.1 to 0.5 MPa. Additionally, the SJ-E204H supports remote control communication for parameter adjustments and status monitoring. The control input accepts NPN open collector or voltage-free contact signals for static elimination stop functions. The output interface provides NPN open collector alarm signals rated at a maximum of 100 mA.
Installation & Maintenance
Proper installation begins with mounting the bar at the correct distance from the target. The SJ-E204H operates effectively between 50 mm and 2000 mm. For optimal performance, engineers should verify the air supply pressure and ensure clean, dry air delivery to the Rc 1/8 port. Moreover, the ambient temperature must remain between 0 and 40°C with humidity below 85% RH without condensation. Maintenance routines should focus on electrode probe cleanliness. Although the series design minimizes particle adhesion, periodic inspection with a soft cloth ensures consistent ion output. Additionally, operators should monitor the condition alarm output. This signal alerts maintenance teams when performance deviates from expected parameters. Always power down the SJ-E204H before performing physical cleaning or wiring adjustments.
Buyer’s Guide FAQ
Q1: What is the effective static elimination length of the SJ-E204H?
The effective length is 2100 mm when measured at an installation distance of 50 mm.
Q2: Can the SJ-E204H operate without an air supply?
Yes, the SJ-E204H functions as an ionizer without air. However, air assistance enhances ion delivery to the target surface.
Q3: What voltage does the SJ-E204H require?
The unit accepts a DC power supply between 24 V and 36 V with a ±10% tolerance.
Q4: How does the SJ-E204H signal a performance issue?
It provides NPN open collector alarm outputs for ion level warnings, condition warnings, and general alarm status.
Q5: What is the recommended air pressure for the SJ-E204H?
Keyence recommends an air supply pressure of 0.2 MPa for standard operation.
