YOKOGAWA VJH7-016-ASN0
| Model：ZR202G100SCETMEASCTF1
Manufacturer: YOKOGAWA Size: 20*20*30cm Detail Specification: Vortex Flowmeter Comment:Carton Shipping Weight:4.5Kg Estimated Lead Time: 12 Weeks Payment：T/T HS CODE：9026201090 Unit price (EXW):405 US dollars Delivery time: 12 – 16 weeks
|
product details
YOKOGAWA VJH7-016-ASN0
Product Overview
The Yokogawa VJH7-016-ASN0 is a microprocessor-based, multi-function isolator belonging to the JUXTA VJ Series of signal conditioners from Yokogawa Electric Corporation. This plug-in device is engineered to receive DC current or voltage signals from industrial field instruments and convert them into pairs of isolated DC voltage or current signals for control systems, PLCs, and DCS. Part of Yokogawa’s renowned VJ series, the VJH7 combines high-performance capabilities with a compact, space-saving design, making it an ideal choice for demanding industrial automation environments where reliable signal isolation and integrity are essential.-27-2
Model Number Breakdown: VJH7-016-ASN0
The VJH7-016-ASN0 model suffix code follows Yokogawa’s structured part numbering system. Based on technical reference manuals and selection tables for the VJH7 series, the breakdown is interpreted as follows:
| Position | Code | Interpretation |
| Product Series | VJH7 | Multi-function Isolator |
| Output Type | 0 | Isolated single output or dual output configuration |
| Power Supply / Input Signal | 16 | Specific input signal type and power configuration |
| Output-1 | A | 4-20 mA DC |
| Output-2 | S | RS-485 MODBUS communication (optional second output) |
| Option / Alarm / Communication | N0 | No optional alarm outputs or specific termination |
The “016” code in the middle digits indicates a specific input signal range and power supply configuration, typically associated with standard DC current or voltage input applications.-17-3
For customers seeking configuration guidance, Yokogawa’s standard dual-output models (such as VJH7-026-AAN0, VJH7-026-AAA0) provide reference points for similar application scenarios.-19
Key Features
Plug-in compact isolator with microprocessor-based architecture for high-performance signal conditioning-14
Two isolated outputs: second isolated current or voltage (pulse) output available as optional feature
Universal input compatibility: field-configurable for DC current, DC voltage applications
Optional RS-485 MODBUS communication (selectable as output-2 signal)-7
Optional Hi/Low alarm relay outputs (two relay contacts, N.O., COM common) available as second output-14
Field configuration capability via PC with VJ77 parameter setting tool or Handy Terminal JHT200-14
Global safety certifications: CE, CSA, UL, KC, RCM-14
Three-year warranty from date of shipment
Technical Specifications
General Specifications
| Parameter | Specification |
| Product Type | Isolator (Multi-function Type) |
| Series | JUXTA VJ Series Signal Conditioners |
| Mounting Type | Plug-in (main unit with socket) |
| Mounting Methods | Wall mounting, DIN rail mounting, or VJ mounting base |
| Construction | Compact plug-in type |
Power Supply Specifications
| Parameter | Specification |
| Supply Voltage Option 1 | 100 to 240 V AC/DC (-15%, +10%), 50/60 Hz |
| Power Consumption (AC) | 2.6 W / 6.7 VA |
| Supply Voltage Option 2 | 15 to 30 V DC (±10%) |
| Power Consumption (DC) | 2.5 W |
| Rated Voltage (Analog Output) | -10 to +10 V DC |
| Rated Voltage (Alarm Output) | 30 V DC 1 A |
| Rated Voltage (Communication Output) | 5 V DC |
Input Specifications
| Parameter | Specification |
| Input Signal Types | DC current (0-20 mA, 4-20 mA) or DC voltage |
| Rated Input Voltage | ±10 V DC maximum |
| Input Impedance | Configurable via external shunt resistor for current input |
| Input Processing | Input handling circuit, limiter circuit, voltage/PWM conversion circuit |
| Software Filter | OFF / LOW (100 ms) / MIDDLE (300 ms) / HIGH (1 s) |
| External Input Resistance Correction | Configurable via parameters |
Output Specifications
| Parameter | Specification |
| Output-1 Types | DC current (4-20 mA) or DC voltage (1-5 V DC) |
| Output-2 Options | DC voltage signal, DC current signal, communication (RS-485), alarm output (two relay contacts) |
| Output Action Direction | Configurable (DIRECT or REVERSE) |
| Accuracy Rating | ±0.1% of span |
| Response Speed | 200 ms (63% from 10% to 90%) |
Communication Specifications
| Parameter | Specification |
| Protocol | MODBUS ASCII / MODBUS RTU |
| Physical Layer | RS-485 |
| Number of Connectable Instruments | Up to 31 units |
| Communication Distance | Up to 1200 m |
| Communication Baud Rates | 1200, 2400, 4800, 9600 bps |
| Communication Wiring | 2 or 4 wires (half-duplex, multidrop) |
| Connector Type | 5-pin modular jack via front panel communication connector |
Physical Dimensions
| Parameter | Specification |
| Height (H) | 76 mm |
| Width (W) | 29.5 mm |
| Depth (D) | 124.5 mm |
| Mounting Hole Pitch | 22 ± 0.2 mm (x 2 locations) |
| Connection Method | M3 screw terminal |
| Main Unit Material | Industrial-grade plastic housing |
Environmental Conditions (Operating)
| Parameter | Specification |
| Temperature Range | -25 to 70°C |
| Temperature Change Rate | 20°C per hour or less |
| Humidity Range | 5 to 95% RH (no condensation) |
| Overvoltage Category | II |
| Pollution Degree | 2 |
| Measurement Category | O (other—not for AC mains direct connection) |
IMPORTANT: The instrument is designed for Measurement Category O applications only and should not be used for measurements in locations falling under Measurement Categories II, III, and IV. -24
Environmental Conditions (Transport & Storage)
| Parameter | Specification |
| Storage Temperature | -25 to 70°C |
| Temperature Change Rate | 20°C per hour max |
| Storage Humidity | 5 to 95% RH (no condensation) |
| ESD Protection | Store in conductive bag when not in use |
Isolation & Dielectric Strength
| Parameter | Specification |
| Standard Withstand Voltage | 2000 V AC between Input – Output – Power – Ground |
| Isolation Topology | Triple isolation: input / output / power supply |
| Insulation Method | Opto-isolation via PWM/optical coupler design |
Safety Certifications
| Standard | Compliance |
| Safety | IEC/EN 61010-1 (CE), IEC/EN 61010-2-030 (CE) |
| Safety | CAN/CSA-C22.2 No.61010-1 (CSA), CAN/CSA-C22.2 No.61010-2-030 (CSA) |
| Safety | UL61010-1, UL61010-2-030 (CSA NRTL/C) |
| EMC (Emissions) | EN 55011 Class A, Group 1 |
| EMC (Immunity) | EN 61326-1 Class A, Table 2, EN 61326-2-3 |
| RoHS | EN 50581 |
| Regional Marks | CE (Europe), CSA (Canada), UL (US), KC (Korea), RCM (Australia/New Zealand) |
Functional Capabilities
Field Configuration
The VJH7 series supports on-site configuration using either a PC running the VJ77 Parameter Setting Tool software or the Handy Terminal JHT200. Through the 5-pin communication connector on the front panel, engineers can configure:
Input type selection (VOLTS for DC voltage or CURRENT for DC current)-38
Input range 0% and 100% values-38
Software filter settings (OFF / LOW / MIDDLE / HIGH)-38
Output action direction (DIRECT or REVERSE)-38
External input resistance correction for precise current input-38
Alarm setpoints, hysteresis, ON/OFF delay, and relay action direction-36
Alarm Output Configuration
When output-2 is specified for alarm output, the following functions become available:
Two independent alarm setpoints (Alarm-1 and Alarm-2)
Configurable alarm action direction (HI-LO or LO-HI)
Adjustable hysteresis
Configurable ON delay and OFF delay timers
Relay contact rating: 30 V DC 1 A maximum
Advanced Circuit Design
The Yokogawa VJH7 leverages a custom-designed ASIC PWM/analog conversion IC, manufactured internally by Yokogawa Electric, that has been specifically optimized for signal conditioning applications. This IC offers significantly improved noise immunity compared to conventional solutions.
The input section consists of four functional blocks: input processing circuit, limiter circuit, voltage/PWM conversion circuit, and pulse output suppression circuit. The input processing circuit handles DC voltage or current signals, adjusts input range width, and performs linearization as needed. For applications requiring thermocouple or RTD inputs, sister models VJU7 within the VJ series provide universal temperature conversion capabilities.-19-3
The voltage/PWM conversion circuit converts the limited voltage signal into a pulse-width modulated (PWM) voltage signal, which is then routed through an opto-isolator—a highly effective method for reducing static current consumption while maintaining robust signal isolation. This design approach has enabled the VJH7 series to achieve noise immunity levels that equal or exceed previous-generation isolators, despite a significantly reduced footprint. The surface mount area required for PWM/analog conversion has been reduced to approximately one-third of prior designs.-17
The modular architecture separates the first and second output sections onto independent printed wiring boards, allowing the dual-output configuration to be built by adding the second output module to the single-output base specification—a design that improves both manufacturing flexibility and serviceability.-17
Certification & Compliance Notes
Important certification notice: The VJH7 series, including models VJA4, VJA7, VJH7, VJP8, VJQ7, VJQ8, VJS7, and VJU7, carry CE, UL, and CSA markings. However, compliance for these models is only guaranteed when powered by 15–30 V DC supply voltage. For units powered by 100–240 V AC/DC, confirm certification applicability with your local Yokogawa representative.-14-3
If option codes /C0 or /FB are specified, conformity to safety and EMC standards is excluded, and CE marking does not apply.-24
Typical Applications
The VJH7-016-ASN0 isolator is suitable for a broad range of industrial signal conditioning applications:
Oil & Gas: Signal isolation for flow control instruments and pressure transmitters in pipelines and refineries-42
Chemical Processing: Precise signal conversion for chemical reactors, mixing systems, and hazardous area instruments-42
Power Generation: Isolated steam and gas flow signal conditioning for power plant monitoring and control systems-42
Water & Wastewater Treatment: 4-20 mA signal isolation for pumps, valves, flow meters, and level transmitters-42
HVAC Systems: Signal conditioning for temperature and humidity sensors in large commercial or industrial facilities-42
Food & Beverage Production: Isolated analog signal transmission for sanitary process instrumentation-42
Pharmaceutical Manufacturing: High-accuracy signal conditioning for critical batch processing and cleanroom monitoring
Package Contents
Each Yokogawa VJH7 unit includes:-7
VJH7 main unit (1)
Instruction Manual (IM 77J01H07-01E)
Tag number label (1)
Range label (1)
Shunt resistor for current input specification (1)
Installation Guidelines
The VJH7 module supports three standard mounting methods:
Wall Mounting: Secure the socket to the wall using screws, then plug the main unit into the socket and fasten with the main unit fixing screw
DIN Rail Mounting: Align the DIN rail with the upper groove at the rear of the socket, then secure using the slide lock mechanism
Multi-mounting Base (VJCE Series): For clustered installations requiring multiple VJ series units in a single panel
Obtain relevant certificates and quotations for the product
