Active Summing Load Cell Junction Box (JBA)

Active Summing Load Cell Junction Box (JBA)
Junction Box Active PCB board only (JPA)
  • Accurate and easy summation of up to 4 strain gauge load cells
  • Corner correction enabled to compensate for manufacturing tolerances and loading in multiple strain gauge installations
  • Individual gain adjustment provided for each channel
  • Simplifies installation of multi-cell platforms, silos, tanks and hopper weighing systems
  • Wide input range - from 0.5 to 20 mV/V
  • No interaction between offset and gain
  • No interaction between channels during calibration
  • Waterproof to IP65 (NEMA4)
  • Supplied pre-mounted in bulkhead housing (JBA as shown in main photo above), DIN rail mounted (D3) or PCB (JPA) version

The JBA is an active summing junction box providing connectivity for up to four strain gauge-based sensors such as load cells, force sensors, pressure sensors, torque sensors etc. It derives its power from a host instrument such as the ADW, LCA20, LCD20.

Individual channel gains are setup via an 8-way DIP switch and multi-turn potentiometers to produce an overall 1:1 input/output gain e.g. if three gauges are connected, they are each given a gain of 0.33 so that when summed, the overall gain is unity. The whole installation then appears as a single gauge to the host.

Any resulting offset (Zero) is not adjustable but can be compensated for in the host instrument.

For a simple summing circuit with no trimming and no corner compensation, use the Passive Load Cell Junction Board (JPP) and for fault monitoring and fault detection alarm features, use the Load Cell Junction Box with Fault Monitoring, (LCI).

Software

No relevant software available

Product order options

The model JBA is supplied pre-mounted in a IP65 NEMA4 ABS housing but is also available as a PCB module JPA.

For alternative housings, select model JPA and then select the desired housing from the list below.

Options Code
Junction Box Active JBA
Junction Box PCB (only) Active JPA
Mounting Enclosure Code
IP65 Rated Case and DIN Rail Mounting for DSJ4, LCA, UAB, JBA, SMW D3
Accessories Code
ABS IP65 Case with Plain ABS Lid 200 x 120 x 75mm LAB
Stainless Steel IP65 Case with Stainless Steel Lid 220 x 160 x 90 mm LSS
Die Cast IP65 Case with Die Cast Lid 220 x 120 x 80mm LDC
Load Cell Amplifier with Relays Data Port & Display for Weighing

Load Cell Amplifier with Relays Data Port & Display for Weighing

LCA20
Load Cell DIN Rail Signal Amplifier

Load Cell DIN Rail Signal Amplifier

LCD20
Load Cell Junction Box & Fault Monitoring Alarm

Load Cell Junction Box & Fault Monitoring Alarm

LCI
Weighing Indicator with Analogue Data & Relay Outputs

Weighing Indicator with Analogue Data & Relay Outputs

ADW15
Weighing Indicator and Controller Bulkhead Mounted

Weighing Indicator and Controller Bulkhead Mounted

SMW
Q: What is the maximum current for the JBA?

A: 20 mA

For more 'Frequently Asked Questions' please see our Knowledge Centre

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