BUILT-IN ISOLATED EXCITATION
Model 205-E is a low-cost 3 1/2 digit (±1,999-count) process meter with a built-in, isolated excitation supply to power two- or four-wire transmitters, bridges or active transducers. Output levels of 24 Vdc at 20 mA or 10 Vdc at 30 mA are jumper-selectable.

LARGE DISPLAY, SMALL CASE
The 205 provides a full-size 14.2 mm (0.56"), red or green LED display, yet is housed in a miniature case with a 24 x 72 mm (0.94 x 2.83") bezel. The case fits into a standard 3/64 DIN cutout, 22.2 x 68 mm (0.87 x 2.68") and requires a depth of less than 120 mm (4.72") behind the panel, including plug-in screw-clamp connectors (standard).

EASY TO SCALE
The 205 may be shipped fully calibrated to meet a customer’s specific requirements (205-FSE). Five signal ranges can be selected via push-on jumpers and precision potentiometers are readily accessible behind the lens to provide zero and span adjustments of 2000 counts each. Accuracy is 99.9% of reading.

MULTIPLE AC POWER OPTIONS
The 205-E incorporates a power supply, which is available for 24, 100, 115 or 230 Vac power. All power options provide EMI filtering, so that power line noise does not affect the reading.

DESIGNED FOR SAFETY
Many design features are incorporated to ensure compliance with the latest worldwide safety specifications. To minimize the possibility of electrical shock, there are no openings which would allow electrical contact with a probe 4 mm (0.16") in diameter. Proper creepage distances are observed for power and signal as specified by IEC-348, Class 1. The power transformer uses separate bobbins for the primary and secondary windings. Type-Y AC line filter capacitors and removable screw-clamp connectors comply with VDE and UL specifications.

SPECIFICATIONS

ACCURACY AT 25°C
Maximum Error: ±0.05% of reading ±1 count
Zero Tempco: ±0.01% of offset/°C
Span Tempco: ±0.02% of reading/°C
Full-Scale Step Response: 1 sec.
Warmup to Rated Accuracy: 30 min.

NOISE REJECTION
NMR, SIG HI to SIG LO: 60 dB, 50/60 Hz
CMR, SIG GND to SIG LO: 86 dB, dc to 60 Hz
CMV, SIG GND to SIG LO: –1 to +2.5 Vdc
Power Supply Rejection: 86 dB at 50/60 Hz

ANALOG-TO-DIGITAL CONVERSION
Technique: Dual-slope, average-value
Signal Integration Period: 100 msec
Read Rate: 2.5/sec

TRANSMITTER EXCITATION SUPPLY
Output Voltage: Selectable 10 or 24 Vdc
Output Current, Max: 30 mA at 10 V, 20 mA at 24 V
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, LED
Color: Red (standard), green (optional)
Digit Height: 14.2 mm (0.56")
Decimal Points : Three positions jumper-selectable
Overrange Indication: Three least-significant digits blank

POWER OPTIONS
AC Voltage: 24, 100, 115 or 230 Vac ±15% @ 2 watts
AC Frequency: 49-63 Hz

ENVIRONMENTAL
Operating Temperature: 0 to 60°C
Storage Temperature: –40 to +85°C
Relative Humidity: 95% at 40°C (non-condensing)

MECHANICAL
Dimensions: 24 H x 72W x 120mm D (0.94" x 2.84" x 4.6")
Bezel (with TP2 Adapter): 25 x 75mm (0.98" x 2.96")
Panel Cutout: 22.2 x 68 mm (0.87" x 2.68")
Weight: 200 g (7 oz)
Case Material: 94V-1 UL-rated Noryl SE-1

205-E Specifications

Model 205-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 205-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.

Analog Input (205-E) (205-P)
Range	4-20 mA	0-0.2 V	1-5 V	0-10 V	0-100 V
Input Resist	13 ohm	1 Mohm	1 Mohm	1 Mohm	1 Mohm
Bias Current	50 pA	50 pA	10 pA	5 pA	1 pA
Max Input	55 mA	250 Vp	250 Vp	250 Vp	250 Vp