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JBOX4800
Summing Box/Transmitter with Process Outputs
- Complete Strain Gage Bridge Signal Conditioner
- High Gain, Low Drift Amplifier
- Wide Input Range from 5 mV to 50 mV Full Scale
- 80% Tare Offset
Product Overview
- Accuracy ± 0.1 %
- Bandwidth -3 dB @ 10 Hz
- CMRR 100 dB
- Common Mode Voltage 5 Vdc
- Electrical Output 0 to 20 mA, 4 to 20 mA, 0 to 10 Vdc, 2 to 10 Vdc
- Enclosure Ratings IP65, NEMA 4
- Excitation Voltage Note Exicitation Voltage Range: 5 to 10 Vdc Current Output: 120 mA max Line Regulation: <0.01% typical 0.002% Output Noise: <1 mVrms 120 Hz bandwidth
- Height 112 mm
- Input Noise 20 mV p-p @ 100 kHz
- Input Range 5 to 50 mV
- Input Type Voltage
- Isolation Isolation (AC or DC, 3-Way): AC to Input or Output: 750 Vac DC to Input or Output: 300 Vdc/500 p
- Length 318 mm
- Linearity ± 0.01
- Loop Resistance, Max 1000 Ω
- Output Noise <1 mVrms, 120 Hz bandwidth
- Response Time 35 ms
- Response Time Note 35 ms (10 to 90%)
- Series ID JBOX4800
- Supply Power AC: 115V (90 to 130V), 230V (180 to 260V);DC: 11 to 30V, 8 W
- Supply Power Type AC/DC
- Tare Adjustment -3 to 6.5 mV, 6.5 to 16 mV, 16 to 25 mV
- Temperature Coefficient 0.0015%/°C;Total : 0.0025%/°C
- Weight 4.7 kg
- Width 229 mm
Supported Applications
The Omega JBox-4800 is an AC or DC powered Summing Transmitter designed for precision weighing applications using load cells. It functions as a summing transmitter capable of processing signals from up to four load cells, providing built-in excitation and three-way isolation suitable for industrial process control add-on loops.
Operating Conditions & Performance
The JBox-4800 operates within an ambient temperature range of 10 to 35°C (50 to 95°F) with a total temperature coefficient of 0.0025%/°C typical. Accuracy is specified as less than ±0.1% at 10 V excitation between 10 and 35°C. The unit accepts an input range of 5 mV to 50 mV full scale with a linearity of ±0.01% FS.
Performance characteristics include a response time rise (10% to 90%) of 35 ms, reaching 0.1% of the final value in 100 ms. The amplifier section provides common-mode rejection of 100 dB minimum and handles input noise of 2 μV PP from 0.1 Hz to 10 Hz.
Configuration Options
The series supports configurable output signals, power inputs, and enclosure options tailored for specific installation requirements:
- Output Signals: Available in current outputs of 0 to 20 mA or 4 to 20 mA (with a zero monitor capability of -0.3 mA), and voltage outputs of 0 to 10 Vdc or 2 to 10 Vdc.
- Bridge Excitation: Built-in supply adjustable from 5 to 10 Vdc, delivering up to 120 mA load current with line regulation less than 0.01% typical.
- Tare Adjustment: Three ranges available: -3 mV to +6.5 mV; +6.5 mV to +16 mV (80% F.S of a 3 mV/V cell at 10 V); and +16 mV to +25 mV.
- Power Supply: AC input supports 115 V (90 to 130 V) or 230 V (180 to 260 V), 50/60 Hz; DC input supports 11 to 30 V.
- Housing: Offered in a NEMA 4 Box or an optional NEMA 4X Stainless Steel Box. The enclosure rating is NEMA 4 (IP65).
- Isolation: Three-way isolation standard: AC to Input/Output at 750 VAC; DC to Input/Output at 300 VDC with 500 pF.
The unit features four black connectors on the bottom of the enclosure for electrical connections. Optional capabilities include High/Low Setpoint-Ready User Plug-In Relays and an Opto22 I/O Module for comparator output applications.
Key Product Differences
The JBOX-4800 is a single model family designated as the 4-input summing transmitter. The primary variation lies in the enclosure material, available as either a standard NEMA 4 Box or an optional NEMA 4X Stainless Steel Box.
Output configuration varies by user selection of zero points (0 mA/2 V vs. 4 mA/10 V) and signal type (current vs. voltage). The board is wired and socketed to accept plug-in relays for high and low setpoint alarms, which are not included in the base unit but activated upon installation.
