
The PR 5531 Loop-Powered LCD Indicator is a rugged, high-performance 4-digit loop-powered display that provides clear process visualization without the need for separate power wiring. The 5531 Series, from PR electronics, is powered directly from a standard 4–20 mA current loop. This versatile process loop indicator is ideal for industrial applications like tank levels, flow rates, temperature, and pressure monitoring where remote signal display is necessary. Its scalable display can easily configure via front push-buttons to show values from -9999 to +9999. Furthermore, the PR 5531 Loop-Powered LCD Indicator includes reversible display options, thereby giving operators precise process insights at a glance.
- The 5531 indicator is powered by the 4 to 20 mA current loop and easily scales to display the correct process value.
- Because it does not require separate power wiring, the PR 5531 Series is perfect for remote display of process loops.
- Models of the 5531 Series are intrinsically safe and feature multiple approvals for use in hazardous areas.
- The PR 5531A display can panel mount in the safe area or I.S. / Ex Zone 2 (gas).
- The PR 5531B can mount in Ex Zone 1.
PR 5531 Loop-Powered LCD Indicator from PR electronics
Built for demanding environments, the 5531 Loop-Powered LCD Indicator features a backlit LCD display that remains highly readable in low light conditions. In addition, the PR 5531 Series offers selectable backlight intensity. This indicator accepts a full measurement range of 3.6 to 23 mA, is NAMUR NE43 compliant, and its input remains HART-transparent for compatibility with intelligent transmitters.
- With a full measurement range of 3.6 to 23 mA, the PR 5531 is NAMUR NE43 compliant.
- The display can be push-button scaled to any range between -9999 to 9999, and reverse display action is possible.
- The LCD backlight can be set to half or full intensity for easy viewing in low light conditions.
- The display only requires 1.5 VDC, (75 Ω loop load), with the backlight turned off.
- The input is HART transparent.
- The front push-buttons can be disabled to prevent unauthorized adjustment.
Easy Mounting, Installation, and Programming
With IP65 front ingress protection when panel mounted using the supplied gasket, this loop-powered LCD indicator is suitable for both safe areas and hazardous locations, thus making it a dependable choice for chemical, water/wastewater, oil & gas, and manufacturing process environments. Easy to configure, energy-efficient, and space-saving, the PR 5531 Series delivers accurate process loop visualization with minimal wiring and installation effort.
- Once panel mounted with the included gasket, the PR 5531 provides IP65 ingress protection.

Models of the PR 5531 Loop-Powered LCD Indicator
| Model ID | Configuration | Approval |
|---|---|---|
| PR 5531A | 4-20 mA Input Signal; Loop-Powered; 4-Digit; Size 48x96 mm. | I.S. / Ex Zone 2 (gas). |
| PR 5531B | 4-20 mA Input Signal; Loop-Powered; 4-Digit; Size 48x96 mm. | I.S. / Ex Zone 1. |
Special Order Options (Adders)
| Part Number Extension | Description |
|---|---|
| PR 8335 | Splash-Proof Cover. |
| PR 8501A | Field Enclosure; Aluminum; 1 Gland; available on model 5531A only. |
| PR 8501B | Field Enclosure; Aluminum; 2 Glands; available on model 5531A only. |
| PR 8501C | Field Enclosure; Aluminum; 3 Glands; available on model 5531A only. |
| PR 8501D | Field Enclosure; Aluminum; 4 Glands; available on model 5531A only. |
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