VJA1-027-AAA0 Yokogawa Dual Output Signal Splitter

Yokogawa VJA1-027-AAA0 VJA Series 4-20mA Isolated Dual Output Distributor

Yokogawa VJA1-027-AAA0 VJA Series 4-20mA Isolated Dual Output Distributor

Availability: 20 left in stock

Yokogawa VJA1-027-AAA0 Compact Plug-in Signal Splitter The Yokogawa VJA1-027-AAA0, also cataloged as the VJA1 Isolated Dual-Output Distributor, operates as a...

SKU: VJA1-027-AAA0

Manufacturer: Yokogawa
Product No.: VJA1-027-AAA0
Product Type: Signal Conditioners
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa VJA1-027-AAA0 Compact Plug-in Signal Splitter

The Yokogawa VJA1-027-AAA0, also cataloged as the VJA1 Isolated Dual-Output Distributor, operates as a dedicated hardware component for converting 4-20 mA DC field transmitter signals into dual isolated outputs within DCS signal conditioning racks.

Suffix Breakdown & Model Matrix

Model / Suffix Code	Specification
VJA1	Compact Plug-in Type Signal Conditioner Distributor
-0	4-20 mA DC Input Signal
2	4-20 mA DC Output-1 Signal
7	4-20 mA DC Output-2 Signal
-A	85-264 V AC / 15-30 V DC Universal Power Supply
A	Standard Type
A	Standard Coating
0	Always 0

Hardware Specifications

Parameter	Specification
Model	VJA1-027-AAA0
Brand	Yokogawa
Origin	Japan
Weight	0.20 kg (0.43 lbs)
Dimensions	Standard VJA series plug-in module
Operating Temp	-10 to +55 deg C
Power Consumption	3.2 W at 24 VDC
Input Signal	4-20 mA DC (250 ohm input resistance)
Output Signals	Dual 4-20 mA DC (Output-1 <= 750 ohm, Output-2 <= 350 ohm)
Transmitter Power Supply	25.25 +/- 0.25 V DC (current limited to 25-35 mA)
Isolation Rating	2000 V AC for 1 minute (Input-Output-Power-Ground)
Accuracy	+/-0.1% of span

4-20 mA HART Loop Protocol & Channel Isolation

The Yokogawa VJA1-027-AAA0 supplies auxiliary 25.25 VDC loop power to two-wire transmitters while processing incoming analog measurement signals. Galvanic 3-way isolation (2000 VAC withstand rating across input, dual output, and power supply circuit paths) eliminates ground loop noise and prevents field-side electrical surges from propagating into control system I/O cards. The dual-channel output section duplicates the 4-20 mA HART loop protocol current signal, allowing engineers to route independent isolation channels simultaneously to local indicators and central DCS controllers without signal attenuation.

Frequently Asked Questions

Q: What happens to the transmitter power supply if a short circuit occurs in the field wiring?

A: The internal transmitter power supply unit limits current output automatically between 25 mA and 35 mA to protect internal transformer elements from overcurrent damage.

Q: Can Output-1 and Output-2 drive different maximum loop impedance loads?

A: Yes, Output-1 supports loop loads up to 750 ohm, whereas Output-2 supports maximum load resistance up to 350 ohm.

Q: How do operators calibrate zero and span drift on this unit?

A: Front-panel trimming potentiometers provide manual zero adjustments within -5% to +5% of span and span adjustments within 95% to 105% of span.

Field Installation Guidelines

Field technicians must observe the following installation requirements when deploying the module:

Seat the plug-in terminal module into its matching DIN-rail or wall-mount socket base until the latching tabs click securely into place.
Connect input wiring using twisted-shielded pair cables, terminating the cable shield at a single dedicated cabinet earth point to block EMI noise.
Verify external load resistance on Output-1 stays at or below 750 ohm and Output-2 stays at or below 350 ohm prior to loop energization.
Maintain a 10 mm clearance around the housing vents to facilitate natural thermal convection and prevent internal heat accumulation.

What's clients say about us

Excellent Emergency Support!

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.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.