Product Description

The VJSS-L17-AAN0 is a high-performance plug-in signal isolator from the Yokogawa JUXTA VJ Series. It is designed to receive DC current or voltage signals and convert them into two independent, electrically isolated outputs for distribution to multiple control or monitoring systems.

The module features three-way isolation architecture, separating input, output, and power circuits to eliminate ground loop interference and protect downstream control systems from electrical noise and transient voltage surges.

The dual-output design allows a single process signal to be simultaneously transmitted to local indicators and centralized control systems such as PLCs or DCS platforms without signal distortion. The L17 configuration supports flexible signal range handling, while the AAN0 suffix indicates the standard dual-output format (4–20 mA + 1–5 V).

The module supports universal AC/DC power input, making it suitable for global industrial installations with varying power standards.

Technical Specifications

Application

The VJSS-L17-AAN0 is widely used in:

• Water treatment plants

• Petrochemical processing facilities

• Power generation control systems

Typical applications include distributing process signals to:

• Safety interlock systems

• Data historians

• Process monitoring and SCADA systems

The high isolation design ensures that faults or shorts on non-critical monitoring circuits do not affect safety-critical control loops.

FAQ

Q1: Does this module require a mounting base?
Yes. It must be installed on a VJ-series socket (such as VJ7) for wiring and DIN rail mounting.

Q2: Can zero and span be adjusted?
Yes. The module includes front-panel trimmers for field calibration of zero and span.

Q3: What is the benefit of the universal power supply?
The module can operate on 100–240V AC or DC power, reducing spare part inventory and simplifying global deployment.