VJSS-L17-AAN0 Yokogawa Dual Output Signal Isolator

VJSS-L17-AAN0 Yokogawa JUXTA VJ Series Signal Isolators

VJSS-L17-AAN0 Yokogawa JUXTA VJ Series Signal Isolators

Availability: 20 left in stock

Yokogawa VJSS-L17-AAN0 JUXTA VJ Series Signal Isolator Configured for high-accuracy signal distribution in process control loops, the Yokogawa VJSS-L17-AAN0 (VJSS-L17-AAN0...

SKU: VJSS-L17-AAN0

Manufacturer: Yokogawa
Product No.: VJSS-L17-AAN0
Product Type: Signal Isolators
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa VJSS-L17-AAN0 JUXTA VJ Series Signal Isolator

Configured for high-accuracy signal distribution in process control loops, the Yokogawa VJSS-L17-AAN0 (VJSS-L17-AAN0 Signal Isolator) provides direct physical/electrical execution by receiving DC process inputs and transmitting dual isolated outputs to control automation hardware. It establishes a three-way galvanic barrier across input, output, and power supply circuits to isolate ground loops and mitigate transient voltage surges within DCS platforms.

Suffix Breakdown & Model Matrix

The catalog structure of the Yokogawa JUXTA VJ Series signal isolator defines specific functional options:

VJSS: Represents the plug-in base model series for signal isolators and distributors.
L17: Designates the specific input signal range and internal transmitter power supply configuration.
AAN0: Specifies the output signal configuration (Output 1: 4-20 mA DC, Output 2: 1-5 V DC), standard response time options, and no modified hardware options.

Hardware Specifications

Parameter	Specification
Model	VJSS-L17-AAN0
Brand	Yokogawa
Origin	Japan
Weight	0.20 kg
Dimensions	Plug-in style housing (VJ socket dependent)
Operating Temp	-10 to +55 deg C
Power Consumption	3.2 W (at 24 VDC)
Input Signal	4-20 mA DC (from two-wire transmitter)
Output 1	4-20 mA DC
Output 2	1-5 V DC
Accuracy	+/-0.1% of span
Response Time	<= 150 ms (0-90% step response)
Insulation Resistance	>= 100 M-ohm at 500 VDC
Withstand Voltage	2000 VAC for 1 minute (Input/Output/Power/Ground)
Power Supply	100-240 VAC/DC universal (85-264 V operational range)

4-20 mA HART Loop Protocol & Channel-to-Channel Isolation

The module utilizes an analog isolation pipeline designed to pass 4-20 mA HART loop protocol signals cleanly across field transmitter boundaries to control system input cards. Channel-to-channel isolation and three-way galvanic shielding eliminate differential ground potential issues, protecting central controller processing units from noise generation. Integrated transmitter power supply circuits deliver 25.25 VDC at current-limited levels to energize field instruments while maintaining cold junction compensation stability on temperature loop conversions across adjacent rack sockets.

Frequently Asked Questions

Q: Can the VJSS-L17-AAN0 module be un-plugged from its base socket while power is applied to the terminal base?

A: No. The field power and input loops must be completely isolated prior to pulling the module from its plug-in base socket to prevent pin arcing, loop spikes, or unexpected control system trips on active channels.

Q: What load resistance limitations apply to the 4-20 mA output channel on this isolator?

A: Output 1 (4-20 mA DC) requires an allowable load resistance of 750 ohm or less to preserve the +/-0.1% span accuracy without driving the current loop drivers into signal saturation.

Q: Does the VJSS-L17-AAN0 supply power directly to field-mounted two-wire transmitters?

A: Yes. The module features an internal transmitter power supply output providing 25.25 +/- 0.25 VDC (current limited to 25-35 mA) directly across the 4-20 mA DC input terminals to loop-power field devices.

Field Installation Guidelines

Mount the dedicated VJ series base socket securely onto a 35 mm DIN rail or control subpanel inside a protective industrial enclosure. Verify that all field wiring uses twisted-shielded pair cables, keeping input and output signal wiring in separate runs away from high-voltage AC lines or motor power circuits to mitigate electrical interference. Connect cable shields to a single point at the system earth ground terminal bar to eliminate potential ground loops across field instruments. Ensure terminal screws are tightened using proper torque specifications to maintain consistent physical electrical connection. Align the guide pins of the VJSS-L17-AAN0 isolator with the base socket receptacle and press firmly until the locking mechanism fully engages before energizing the 100-240 VAC/DC supply power.

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Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

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