JB4ES TuffSeal® Excitation Trim Junction Box

As of: Wednesday, July 9, 2025
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Standard Features

  • Jumpers to enable trimming
  • PreVent™ breather vent
  • Conformal coated circuit board
  • Number of cells: two, three or four single cells
  • Expansion port
Applications
  • Floor, tank, hopper scales

Approvals

LOGO FM CUS

WARNING: Cancer and Reproductive Harm California Proposition 65

The JB4ES TuffSeal® excitation trim junction box sums two or four single load cell inputs with the potential to expand and connect other junction boxes. The stainless steel NEMA Type 4X enclosure is optimal protection against harsh environments and abrasive materials. The JB4ES TuffSeal excitation trim junction box is ideal for use in tank and hopper scale applications.

JB4ES Tuffseal Excitation Trim Junction Box Specifications

Cable Fittings:
(4) PG7 0.118 to 0.255 in strain relief
(2) PG11 0.197 to 0.394 in strain relief

Rating/Material:    
NEMA Type 4X
Stainless steel

Connectors:
Spring clamp screwless, 12 to 28 AWG

Trimming:
Individual cell, excitation trim

Temperature:
Operating:
0 °F to 122 °F (-18 °C to 50 °C)

Potentiometers:
100 ohm, 25-turn cermet

Circuit Board:
3.8 × 2.3 in, with conformal coating

Warranty:
One-year limited

Approvals:
cFMus

JB4ES Tuffseal Excitation Trim Junction Box Dimensions

Replacement Junction Boxes, Boards or Components Table

Model Complete J-Box Replacement Replacement Board Only Replacement Cord Grips Replacement Pressure & Condensation Vent Desiccant Packs
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*
(The board does not have section trim capabilities)
92473 (The board does not have section trim capabilities) 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* Need (1) 77445, (1) 89889, (1) 89894 15655 (cord grip)
15656 (nut)=3/8" NPT
15628 (cord grip)
15630 (nut)=1/2" SPT
N/A N/A

*See catalog page for enclosure dimensions

Parts

Part # Description
91779 J-Box,JB4ES 4 Channel Excitation Trim with Expansion, Stainless Steel Nema 4X FM Approved
89446 Board,4 Channel ET Excitation Trim w/Expansion FM
165271 Enclosure,JB4SS/ES Only JB4SS/ES Junction Box Enclosure W/Cord Grips & Filter. Includes Cover and Gasket.

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