Key Features
Stainless steel NEMA Type 4X enclosure for corrosion and washdown protection
Supports two, three, or four single load cells
Excitation trim with individual cell adjustment
Jumpers to enable or disable trimming
PreVent™ breather vent to prevent condensation
Spring clamp screwless connectors (12 to 28 AWG)
Conformal coated circuit board for moisture and dust resistance
Includes expansion port to connect additional junction boxes
Ideal for tank, hopper, and floor scale applications
Wide temperature range: 0 °F to 122 °F
One-year limited warranty and cFMus approved
The JB4ES TuffSeal® Excitation Trim Junction Box is engineered to sum two to four single load cell inputs in demanding industrial applications. With its excitation trimming capability, this junction box allows precise individual load cell adjustment for enhanced accuracy in your weighing system.
Its stainless steel enclosure is NEMA Type 4X rated, making it the right choice for environments exposed to washdowns, harsh weather, or abrasive materials. The PreVent™ breather vent keeps internal electronics safe from condensation, while the conformal coated circuit board adds a layer of reliability and protection.
Built with modular expandability, the JB4ES can link with additional junction boxes, making it highly adaptable for tank, hopper, and floor scale installations. It's a compact yet powerful junction solution backed by Rice Lake's trusted engineering.
JB4ES TuffSeal® Excitation Trim Junction Box Specifications| Material | Stainless Steel |
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| Enclosure Rating | NEMA Type 4X |
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| Load Cell Capacity | Two, Three, or Four Single Load Cells |
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| Cable Fittings | (4) PG7: 0.118 – 0.255 in, (2) PG11: 0.197 – 0.394 in |
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| Connectors | Spring Clamp, Screwless (12 to 28 AWG) |
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| Trimming Type | Excitation Trim (Individual Cell) |
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| Potentiometers | 100 ohm, 25-turn cermet |
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| Circuit Board Size | 3.8 × 2.3 in with conformal coating |
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| Temperature Range | 0 °F to 122 °F (-18 °C to 50 °C) |
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| Warranty | One-Year Limited |
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| Approvals | cFMus |
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Complete Replacement Parts Table| Model | Complete J-Box Replacement | Replacement Board Only | Replacement Cord Grips | Replacement Pressure & Condensation Vent | Desiccant Packs |
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| JB4SS | 88956 | 88958 | 58983=PG7, 59001=PG11 | 88733 PreVent™ breather (vent), 88734 (vent nut) | 92240 |
| JB4ES | 91779 | 89446 | 58983=PG7, 59001=PG11 | 88733 PreVent™ breather (vent), 88734 (vent nut) | 92240 |
| JB4SP / JB4SPT | 91780 / 92762 | 88958 / 89894 | 58983=PG7, 59001=PG11 | 88733 PreVent™ breather (vent), 88734 (vent nut) | 16039 |
| JB4EP / JB4EPT | 91781 / 92763 | 89446 / 89894 | 58983=PG7, 59001=PG11 | 88733 PreVent™ breather (vent), 88734 (vent nut) | 16039 |
| EL204 | 73428 | 88958 | N/A | N/A | N/A |
| JB8SP | 91782, 173807 - FM Approved | 89889, 172415 - FM Approved | 15655 (cord grip), 15656 (nut)=3/8" NPT, 15628 (cord grip), 15630 (nut)=1/2" SPT | 88733 PreVent™ breather (vent), 88734 (vent nut) | 16039 |
| JB8SPT | 91783 | 89889 (load cell), 89894 (transient protection) | 15655 (cord grip), 15656 (nut)=3/8" NPT, 15628 (cord grip), 15630 (nut)=1/2" SPT | 88733 PreVent™ breather (vent), 88734 (vent nut) | 16039 |
| EL304A | 21169 | 21301 | N/A | N/A | N/A |
| JB1010 | 36231 | 36351 | N/A | N/A | N/A |
| JB1010ST | 68813 | 68811 | N/A | N/A | N/A |
| EL210 | 91781, JB4EP* | 92472 | 58983=PG7, 59001=PG11 | N/A | N/A |
| EL211A | 91780, JB4SP* | 92473 (no section trim) | 58983=PG7, 59001=PG11 | N/A | N/A |
| EL604-AL | 88956, JB4SS* | 88958 | 58983=PG7, 59001=PG11 | N/A | N/A |
| EL604STA | 88956, JB4SS* | 88958 | 58983=PG7, 59001=PG11 | N/A | N/A |
| EL604ETA | 91779, JB4ES* | 89446 | 58983=PG7, 59001=PG11 | N/A | N/A |
| EL504 | 21165 | 21296 | N/A | N/A | N/A |
| JB808S | 91782, JB8SP* | 92471 | 15655 (cord grip), 15656 (nut)=3/8" NPT, 15628 (cord grip), 15630 (nut)=1/2" SPT | N/A | N/A |
| JB818ST | 91783, JB8SPT* | 77445, 89889, 89894 | 15655 (cord grip), 15656 (nut)=3/8" NPT, 15628 (cord grip), 15630 (nut)=1/2" SPT | N/A | N/A |
Why Choose the JB4ES TuffSeal®?
When precision, protection, and expandability are key, the JB4ES TuffSeal® from Rice Lake is your go-to solution. Designed for industrial floor, tank, and hopper scale systems, this junction box streamlines your setup with accurate excitation trimming and robust enclosure integrity. Order the JB4ES TuffSeal® Excitation Trim Junction Box from SellEton Scales today — your authorized Rice Lake dealer — and optimize your weighing system with trusted performance.
