iQUBE³ Digital Diagnostic Junction Box

As of: Monday, February 2, 2026
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Iqube 3 Diagnostic Junction Box Left Face

Standard Features

  • Designed for weighing systems using the 1280 Enterprise™ Series indicator
  • iQUBE³ CPU board: Four A/D channels, SD Slot, RS232/485, four DIOs, Ethernet TCP/IP (wired), USB-C
  • iQUBE³ CPU board supports networking up to five iQUBE³ four-channel boards (four A/D channels each), for a total of 24 A/D channels; connection can be up to four separate scales and a system total
  • Diagnostic routines for weighing errors and system health
  • Additional diagnostics for overloaded, underloaded, zero reference, drift, noise and unbalanced conditions
  • Onboard status LEDs for communication and visual bi-color indication of load cell health
  • Load cell emulator compensates for a failed load cell
  • Cal-Match® algorithm automatically trims and calibrates the scale in one pass of test weights (stopping over each load cell)
  • Two option slots available

Options

  • Fiber optic
  • Analog output: 16-bit resolution, 0 to 10 VDC, 0 to 20 mA, 4 to 20 mA
  • Relay or Serial (two RS-232 or RS-422/485)
  • Bridge resistance board
Applications
  • Truck and railroad scales
  • Tank and hopper scales
  • Multi-channel scales

Approvals

NTEP Logo

WARNING: Cancer and Reproductive Harm California Proposition 65

Improve Your System with a Digital Diagnostic Junction Box
The iQUBE³ junction box provides stable weight readings for any analog load cell through its reliable digital signal. Built-in reporting for load cell status, voltages and error conditions can expedite troubleshooting to maximize system uptime.

Simplified Installation and Use
The iQUBE³ digital diagnostic junction box has an easier and faster setup compared to a traditional analog junction box. Because each load cell is individually monitored, there is immediate visibility for issues including drift, instability or a failing load cell, limiting troubleshooting time. You also gain cleaner digital signal transmission, better noise immunity and simple plug-and-play configuration, making routine scale maintenance quicker and more accurate.

iQUBE³ Digital Diagnostic Junction Box Specifications

Voltage Input: 
AC voltage: 100 to 240 VAC; 50/60 Hz
DC voltage: 9 to 36 VDC

Analog Signal Input Range:    
-51 to +51 mV

Analog Signal Sensitivity:
0.3 uV/grad at 30 Hz
0.5 uV/grad at 100 Hz
1.2 uV/grad at 500 Hz

A/D Sampling Rate:
2.5 to 500 Hz (selectable)

Digital I/O:
Four per card, for push-button operation, setpoint control or cell status
24 mA per DIO at 5 V



Communication Ports:
RS-232/RS-422/485
USB-C
Ethernet TCP/IP, wired standard
Ethernet TCP/IP, optional wireless

Load Cell Inputs:
Connect up to 24 load cells (four, per board)

Load Cell Excitation:
3.3 VDC, 38 mA maximum per channel
Up to 24 × 350 ohm load cells

Rating/Material:
Polycarbonate (NEMA Type 4X) enclosure
Stainless steel (NEMA Type 4X) enclosure with hinged cover 

Temperature:
Certified: 14 °F to 104 °F (-10 °C to 40 °C)
Operating: -40 °F to 140 °F (-40 °C to 60 °C)
Storage: -40 °F to 158 °F (-40 °C to 70 °C)

Warranty:
Two-year limited

Approvals:
NTEP 25-041
Measurement Canada (pending)
cULus (pending)
CE Marked (pending)

iQUBE³ Digital Diagnostic Junction Box Dimensions

Stainless Steel
A 13.50 in (343 mm) E 8.00 in (203 mm)
B 12.28 in (312 mm) F 6.29 in (160 mm)
C 12.75 in (324 mm) G 6.20 in (157 mm)
D 10.28 in (261 mm)    
Polycarbonate Small
A 12.13 in (308 mm) E 5.98 in (152 mm)
B 11.45 in (291 mm) F 6.95 in (176 mm)
C 10.51 to 11.30 in (267 to 287 mm) G 6.71 in (170 mm)
D 9.32 in (237 mm)    
Polycarbonate Large
A 14.13 in (359 mm) E 7.99 in (203 mm)
B 13.46 in (341 mm) F 7.02 in (178 mm)
C 12.52 to 13.31 in (318 to 338 mm) G 6.79 in (172 mm)
D 11.36 in (289 mm)    

Parts

Part # Description
AC Power Supply
227157 JBOX, Digital, iQUBE3, 4-Channel, Polycarbonate, Small, 115/230 VAC
227158 JBOX, Digital, iQUBE3, 4-Channel, Polycarbonate, Large, 115/230 VAC
227159 JBOX, Digital, iQUBE3, 8-Channel, Polycarbonate, Large, 115/230 VAC
227160 JBOX, Digital, iQUBE3, 4-Channel, SST, 10in x12 in, 115/230 VAC
DC Power Supply
227165 JBOX, Digital, iQUBE3, 4-Channel, Polycarbonate, Small, 9-36VDC, Transient Voltage Surge Suppressor
227166 JBOX, Digital, iQUBE3, 4-Channel, Polycarbonate, Large, 9-36VDC, Transient Voltage Surge Suppressor
227167 JBOX, Digital, iQUBE3, 8-Channel, Polycarbonate, Large, 9-36VDC, Transient Voltage Surge Suppressor
227168 JBOX, Digital, iQUBE3, 4-Channel, SST, 10in x 12in, 9-36VDC, Transient Voltage Surge Suppressor
Without Power Supply
227161 JBOX, Digital, iQUBE3, 4-Channel, Polycarbonate, Small
227162 JBOX, Digital, iQUBE3, 4-Channel, Polycarbonate, Large
227163 JBOX, Digital, iQUBE3, 8-Channel, Polycarbonate, Large
227164 JBOX, Digital, iQUBE3, 4-Channel, SST, 10in x 12in

Options

Part # Description
231373 Board Assy,CPU Board, Four-Channel With Cables and Connectors, iQUBE3
227169 Board Assy, 4-Channel, iQUBE3
227171 Power Supply,115/230VAC, 24VDC Output, FRP Enclosure, Remote Power
230935 Indicator, iQUBE3 Bridge Resistance Card Assembly Kit
215178 Mounting Feet, New Style Mounting feet for new style JB4SP,JB4SPT,JB4EP,JB4EPT,JB8SP JB8SPT AND iQUBE enclosures. Set of 4 and includes 10-32 screws NOT for Hoffman enclosures
Conduit Adapter
92735 Assembly,Coupling & Cap Bonded, 3/8in NPT Cap To Coupling 92575
92734 Assembly,Coupling & Cap Bonded, 1/2 in NPT Grip Cap To 92574 Coupling
Communication Cards
211710 Ind Opt,Dual Serial Card 68x Series/iQube3, Install Kit
231366 Ind Opt,WiFi Module Edge Finger Connection Style, 802.11 a/b/g/n, for iQUBE3
230919 Fiber-optic Card Assembly
Duplex Fiber (Max Run 350 ft)
78026 Cable,Plastic Optical 100 ft. includes polishing kit
78027 Cable,Plastic Optical 200 ft. includes polishing kit
78910 Cable,Plastic Optic Fiber, Duplex 1.00mm Core 2.2mm OD Fluorinated Polymer Jacket Price Per Foot
1280 Indicators for use with iQUBE3
189623 1280 Panel 7 KL No AD AC Enclosure Panel Keyless 7" AC Power Supply No Power Cord Supplied Display Type Standard Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
188526 1280 Panel 7 KL No AD AC Enclosure Panel Keyless 7" AC Power Supply No Power Cord Supplied Display Type High Visibility Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
188395 1280 Panel 12 KL No AD AC Enclosure Panel Keyless 12" AC Power Supply No Power Cord Supplied Display Type High Visibility Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
181073 1280 Panel No AD DC Enclosure Panel Mount DC Power Supply No Power Cord Supplied Display Type Standard Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
178473 1280 Panel No AD AC Enclosure Panel Mount AC Power Supply No Power Cord Supplied Display Type High Visibility Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
205677 1280 Wall No AD AC-US Enclosure Wall Mount AC Power Supply U.S. Wall Mount Power Cord Display Type Standard Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
171667 1280 Wall No AD AC-US Enclosure Wall Mount AC Power Supply U.S. Wall Mount Power Cord Display Type High Visibility Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
174750 1280 Panel No AD AC Enclosure Panel Mount AC Power Supply No Power Cord Supplied Display Type Standard Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
174207 1280 Univ No AD AC-Eur Enclosure Universal AC Power Supply Europe Universal Power Cord Display Type Standard Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
171582 1280 Univ Single AC-US Enclosure Universal AC Power Supply U.S. Universal Power Cord Display Type Standard Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
188713 1280 Univ No AD DC Enclosure Universal DC Power Supply No Power Cord Supplied Display Type Standard Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
171540 1280 Univ No AD DC Enclosure Universal DC Power Supply No Power Cord Supplied Display Type High Visibility Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open
172419 1280 Univ No AD AC-US Enclosure Universal AC Power Supply U.S. Universal Power Cord Display Type High Visibility Slot 1 Open Slot 2 Open Slot 3 Open Slot 4 Open Slot 5 Open Slot 6 Open

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