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301 Loop powered display 4-20 mA, field enclosure

301 Loop powered display 4-20 mA, field enclosure

Product catalog summary

Overview: The document provides technical specifications and features of the Loop Powered 4-20 mA LED-displays, models 301 and 305, manufactured by Nokeval. These displays are designed for process input without the need for an external power supply, utilizing the 4-20 mA current signal for operation.

Key Features:

Operates on a 4-20 mA process input without external power.
Low loop resistance of 240 ohms.
4-digit processor-based display with front panel scaling.
Optional two settable alarms with password protection for configuration.
ABS-case with IP65 rating, available in two sizes: 100 x 100 x 57 mm (models 301 & 302) and 80 x 80 x 57 mm (models 305 & 306).

Technical Specifications:

Input: 4-20 mA, linear or square root.
Display scaling range: -999 to +9999.
Accuracy: 0.05% of span.
Input resistance: 240 ohms for models 301/305, 370 ohms for models 302/306 with alarms.
Alarm relays (optional): 2 solid state relays, max 250 VAC, 150 mA.
Display: 4-digit red LED, 14.5 mm, adjustable brightness.
Case protection: IP65, made of grey ABS-plastic.
Operating temperature: 0 to +60 °C.
Weight: 200 g.

Model Variants:

301-4/20: Basic model, 100 x 100 x 57 mm case.
302-4/20: With alarms, 100 x 100 x 57 mm case.
305-4/20: Basic model, 80 x 80 x 57 mm case.
306-4/20: With alarms, 80 x 80 x 57 mm case.

Additional Information: The displays are equipped with a digital filter for stabilizing the display and allow for configuration and alarm settings via front panel buttons. The smaller enclosure models (305 and 306) have a single PG11 inlet.

301 Loop powered display 4-20 mA, field enclosure

301 Loop powered display 4-20 mA, field enclosure

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