DP7800-230VAC Dual Input Process Meters with Math Functions
Dual Input Process Meters with Math Functions
Supported Applications
The Omega DP7800 Series consists of dual input digital voltmeters designed for process measurement and control applications. These panel-mounted instruments feature a five-digit, seven-segment LED display with programmable ranges to monitor DC voltage and current signals.
Operating Conditions & Performance
The DP7800 Series operates within an ambient temperature range of -20°C to +60°C. Storage is supported from -25°C to +85°C, with a relative humidity rating of 0% to 90%, Non-condensing. The instrument performs analog-to-digital conversions at a rate of 3 Conversions/Second using a 16 Bit Sigma Delta technique.
Accuracy is specified as ± .01% of reading ± 1 count of LSD. Measurement ranges are programmable via solderless jumpers on the rear of the unit, covering:
• 0 to ±200mV
• ±2V
• ±20V
• ±200V
• 4-20mA
When option 20 is selected, ranges include 0-5V, 1-5V, or 4-20mA. The display span is programmable from ± 1000 to ± 30,000 counts with a digital zero (tare) capability of 50% of span.
Configuration Options
The series supports various power supply configurations and optional interfaces. Standard AC power requirements are 105VAC to 132VAC @ 50mA (47Hz to 500Hz) or 198VAC to 264VAC @ 25mA (47Hz to 500Hz). Additional power options include +5VDC, 9-18VDC, 18-36VDC, and 230VAC; 50Hz - 400Hz.
Optional analog outputs track the input signal:
• Voltage: 0-10V with 2.5mV resolution (maximum drive capability ±2mA)
• Current: 4-20mA output, maximum load 600Ω
The series includes two form “A” relay limit outputs rated .25A at 28V. Serial communication is available via ASCII RS-232 or RS485 compatible interfaces with programmable baud rates of 9600, 4800, 2400, 1200, 600, 150, & 75. Electrical connections utilize fifteen quick disconnect terminals.
Physical dimensions include a panel cutout of 3.58" x 1.77" and an instrument face of 3.80" x 1.97", corresponding to Case size 'D'. The unit weighs 1 pound. A Sunlight Readable Red LED display is available as an option.
Key Product Differences
Variants within the DP7800 Series are distinguished by power supply type, analog output capability, and serial interface options:
• -S2: RS232 Compatible Interface
• -S4: RS485 Compatible Interface
• -DC5: +5VDC input power 600mA max
• -AMA: 4-20mA output max load 600Ω
• -A10: Analog output, (0-10VDC) tracks input
• -DC 9/18: 9-18VDC power @ 600mA
• -DC 18/36: 18-36VDC power @ 500mA
• -230VAC: 230VAC; 50Hz - 400Hz input power
• -LED: Sunlight Readable Red LED
| Accuracy | ± 0.01 % |
| Accuracy Detail | ±0.01% of reading ±1 count of LSD |
| Baud Rate | 75 to 9600 |
| Common Mode Voltage | 1400 Vp (AC or DC) between analog output ground and AC power line ground |
| Control Output | 2 SPDT Relay |
| Conversion Rate | 3/sec |
| Cutout Dimensions | 45 x 92 mm |
| Display Size | 14.3 mm (0.56 in) |
| Display Type | 5 Digit LCD |
| Display Type Note | 5-digit, 7-segment, 14.3 mm (0.56") high LED Limit |
| Form factor | 1/8 DIN |
| Functions | Range Programming: Solderless jumpers on rear of unit; select 200 mV, ±2V, ±20V, ±200V or 4 to 20 mA |
| Height | 50 mm |
| Input Type | MA, MV, 10V |
| Number of Inputs | 2 |
| Operating Temperature, Max | 60 °C |
| Operating Temperature, Min | -20 °C |
| -20 °C | Standard dual form “A” relays rated 0.25 A @ 28V. Analog Output (Optional): 0 to 10 Vdc @ 2.5 mV resolution; 0V and 10V points are programmable via front-panel switches: maximum drive capability ±2 mA; the 4 mA and 20 mA points are programmable via front-panel switches; 4 to 20 mA output, maximum load 600 Ω |
| Relative Humidity | 0 to 90% non-condensing |
| Sampling Rate | 3 Hz (3 updates/second) |
| Series ID | DP7800-Series |
| Storage Temperature, Max | 85 °C |
| Storage Temperature, Min | -25 °C |
| Supply Power Note | Power: Standard: 115 Vac (15 to 10%) @ 50 mA (47 to 500 Hz) Optional: 230 Vac (15 to 10%) @ 25 mA (47 to 500 Hz) Optional: 9 to 18 Vdc or 18 to 36 Vdc |
| Weight | 454 g |
| Width | 97 mm |