GMA-JB4-Ex is an intrinsic safety explosion-proof junction box that supports connections for 4 analog or digital load cell in 4-wire. By adjusting the resistance value of the potentiometer, it compensates for angle deviations, effectively resolving inaccurate weight results caused by angle differences in weighing applications. Stainless steel housing with 5 explosion-proof cable glands(Ex Marking: Ex db 11C Gb, IP Rating: IP66) delivers enhanced protection and superior anti-interference performance. Certified for intrinsic safety explosion-proof standards, it is ideal for deployment in hazardous environments. OPERATING INSTRUCTION Terminal identification • GMA-JB4-Ex can connect with the analog or digital load cell. ©When applying to the analog load cell: • EX-: EXCITATION - • SHLD: SHIELD (When the load cell is six-wire, short-circuit the +excitation and +sense to EX+, short-circuit the -excitation and -sense to EX-.) ©When applying to the digital load cell: • 12V+: EXCITATION + • 1 2V-: EXCITATION - • SHLD: SHIELD Adjustment Method ©Switches SW1-SW4 can be assigned to control the on-off of each load cell for single-channel load cell adjustment. ©Potentiometer R1-R4 can fine-tune the output signal of each load cell respectively for adjustment of the four corners of the load cell. Four-Angle Deviation Adjustment Method • Step 1: Before adjustment, the four-channel potentiometer is gently rotated to the middle position; • Step 2: Fine-tune the channel with large deviation to the average value (close the other three channels when observing one channel); • Step 3: Repeat step 2 until the millivolt signals of four-channel are similar.

GENERALMEASURE Dimensions Connection Diagram Load cell 1 WEIGHING CONTROLLER Weighing indicator 3 ground terminals easy to install on-site General Measure Technology Co.,Ltd. Address: Room2208, Block A, Building 6, Shenzhen International Innovation Valley, Nanshan District, Shenzhen, Guangdong Province, P.R.China. Tel/Wechat: +86 185 6585 5789 E-mail: [email protected] Website: www.gmweighing.com