Intrinsic Safety Explosion-proof Junction Box GMA-JB4-Ex
GMA-JB4-Ex is an intrinsic safety explosion-proof junction box that supports connections for 4 analog or digital load cells 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 llC 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.
Ex marking: Ex ia llC T4 GaI
IP Rating:lP65
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IP 65
Highly Integrated
EMC Testing Passed
CE Approve
Compact Design
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Four-wire Connection Method
- Internal wire terminals are identified as:
"+E"-- EXCITATION +
"-E" -- EXCITATION -
"+S"-- SIGNAL +
"-S"-- SIGNAL -
"GND"-- SHIELD
- When the load cell is six-wire, short-circuit the +excitation and +sense to EX+, short-circuit the -excitation and -sense to EX-.
Adjustment Method
- Precision potentiometers W1~W4 can fine-tune the output signal of each load cell, which is used to adjust the four-angle deviation of the system.
Four-Angle Deviation Adjustment Method
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Before adjustment, the four-channel potentiometer is gently rotated to the middle position;
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Fine-tune the channel with a large deviation to the average value (close the other three channels when observing one channel);
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Repeat step 2 until the millivolt signals of the four-channel are similar.
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Certification: Ex db [ia IIC Ga] IIB T6 Gb.
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- Four-channel can direct connect four load cells;
- Intelligent reminder for load cell installation;
- Automatic angular difference adjustment;
- Calibration without weight function;
- Warning Function: unbalanced load, installation base subsidence, load cell damage, load cell wiring failure
- Emergency use function.
Intrinsic Safety Explosion-proof Junction Box GMA-JB4-Ex
GMA-JB4-Ex is a intrinsic safety explosion-proof junction box that supports connections for 4 analog or digitalload cell in 4-wire. Certified for intrinsic safety explosion-proof standards, stainless steel housing with 5 explosion-proof cable glands delivers enhanced protection and superior anti-interference performance.
See Details