![]() |
![]() ![]() ![]() BUILT-IN TRANSMITTER EXCITATION SUPPLY Model 202A-E is a low-cost 3 1/2 digit process meter which incorporates an electrically-floating supply for powering transmitters, active transducers and bridges. In many cases, this built-in supply can eliminate the need for a more expensive external supply. The output voltage is adjustable from 10 to 24 V dc. Maximum output current is 50 mA at any voltage setting. LOW-COST PROCESS MONITOR Except for the excitation supply, the 202A-E is identical to the 202A-P, a low-cost 3 1/2 digit (±1,999-count) process meter for applications where indication-only is required. It provides zero and span adjustments of 2,000 counts each for readout in engineering units from signals such as 4-20 mA, 1-5 V and 0-10 V. Scaling and calibration are easily accomplished in the field by multiturn potentiometers accessible behind the lens. Accuracy is 99.9% of reading. COMPACT CASE The 202A-E is housed in a 1/8 DIN case that requires less than 4.1 in (104 mm) behind the panel. A screw-terminal barrier strip for signal and power is standard. OPTIONS Options are isolated 9-32 V dc or 26-56 V dc power, a PCB edge connector for display control and output of +4.7 V dc and 4.7 V dc power, and a splash-proof lens cover which meets NEMA-4 requirements. SPECIFICATIONS ANALOG INPUT
NOISE REJECTION NMR, SIG HI to SIG LO: 56 dB, 50/60 Hz CMR, SIG GND to SIG HI: 120 dB at gain 100, DC to 60 Hz CMR, SIG GND to PWR GND: 120 dB, DC to 60 Hz CMV, SIG GND to PWR GND: 1500 Vp per HV test, 354 Vp per IEC spacing ACCURACY AT 25°C Maximum error: ±0.05% of reading ±1 count Zero tempco: ±0.01% of offset/°C Span tempco, ratiometric: ±0.01% of reading/°C Span tempco, non-ratiometric: ±0.03% of reading/°C Full-scale step response: 1 s Warmup to rated accuracy: 1 min ANALOG-TO-DIGITAL CONVERSION Technique: Dual-slope, average value Signal integration period: 100 ms Read rate: 2.5/s TRANSMITTER EXCITATION SUPPLY Output voltage: Adjustable from 10 to 24 V dc Output current, max: 50 mA Line regulation: ±0.01%/V of AC power Load regulation: ±0.5% Tempco: ±0.02%/°C Ripple at 50/60 Hz: ±0.01% DISPLAY Type: 7-segment, red LED Height: 0.56 in (14.2 mm) Symbols: 1.8.8.8 Decimal points: Three positions, programmable by jumpers or at connector, 10 mA sink Overrange indication: Three least-significant digits blank DIGITAL INPUTS Level: TTL or 5 V CMOS compatible POWER AC voltages: 115 or 230 V ac, ±15% AC frequency: 49 to 440 Hz DC voltages: 9-32 V dc, isolated to 300 Vp; 26-56 V dc, isolated to 300 Vp Power consumption: 3.7 W Output voltages: +4.7 V dc and 4.7 V dc ±5%, 10 mA max ENVIRONMENTAL Operating temperature: 0 to 60°C Storage temperature: 40 to +85°C Relative humidity: 95% at 40°C (non-condensing) MECHANICAL Dimensions: Newport DIN2A (short 1/8 DIN) case (see Mechanical section for drawings) Weight: 15 oz (425 g) Case material: 94V-0 UL-rated polycarbonate Model 202A-E with electrically-floating excitation supply and process signal conditioner, configured for operation with a 2-wire 4-20 mA transmitter (powered by 4-20 mA loop). Excitation return is tied to signal low. Model 202A-E with electrically-floating excitation supply and process signal conditioner, configured for operation with a 4-wire transmitter. The transmitter signal may be DC Voltage or current. HOME / PRODUCT GUIDE / TECHNICAL REFERENCE NEWPORT Electronics, Inc. (714) 540-4914 or Contact Us Copyright 1999, Newport Electronics, Inc. All rights reserved. |