Features

  • CSA Certified Stainless Steel or Aluminum Explosion-Proof Loop-Powered Meter
  • 4-20 mA Input with ±0.05% Accuracy of Calibrated Span
  • 1.7 Volt Drop (4.7 Volt Drop with Backlight)
  • Easy Field Scaling in Engineering Units without a Calibrator
  • 0.6" (15.2 mm) 3½+ Digits LCD Display; -1999 to 2999
  • Display Mountable at 0°, 90°, 180°, & 270°
  • HART® Protocol Transparent
  • Loop-Powered Backlight Option
  • Operating Temperature Range: -40 to 75°C (-40 to 167°F)
  • Installation Temperature Range: -55 to 75°C (-67 to 167°F) (Stainless Steel Models Only)
  • Four Internal Buttons for Easy Field Scaling
  • Max/Min Display
  • Programmable Noise Filter
  • 32-Point Linearization & Square Root Extraction
  • Conformal Coated PCBs for Dust & Humidity Protection
  • FM Approved as Explosion-Proof / Dust-Ignition Proof / Flame-Proof (Aluminum Models Only)
  • CSA Certified as Explosion-Proof / Dust-Ignition Proof / Flame-Proof
  • ATEX and IECEx Certified as Flame-Proof and Protection by Enclosure (Aluminum Models Only)
  • Flanges for Wall or Pipe Mounting
  • Explosion-Proof, IP68, NEMA 4X Die-Cast Aluminum or 316 Stainless Steel Enclosure
  • Two 1/2" NPT Conduit Openings (Model with Two M20 Conduit Openings Available)
  • 1.5" U-Bolt Kit & 2" Pipe Mounting Kits Available
  • Stainless Steel Tag Available
  • 3-Year Warranty

Why Use Loop-Powered Meters?

The most basic decision a user wishing to display a 4-20 mA signal on a digital display has to make is: should the meter be powered by line voltage or should it be powered by the 4-20 mA loop?

There are three main benefits of using loop-powered devices:

  • No additional power required
  • Easy wiring
  • Additional digital displays can easily be added in the same loop

The following diagram illustrates how a loop-powered meter is wired. Notice there are only two connections made to the meter.

For more information on loop-powered meters, check out Fundamentals of Loop-Powered Devices and Loop-Powered vs Line-Powered Meters white papers.

Overview

The ProtEX-Lite PD663 is a loop-powered field meter housed in an IP68, aluminum enclosure that is FM Approved and CSA Certified as Explosion-Proof, Dust-Ignition Proof, and Flame-Proof, and ATEX & IECEx Certified as Flame-Proof.

The PD663-SS is the stainless steel version of the ProtEX-Lite that is CSA Certified as Explosion-Proof, Dust-Ignition Proof, and Flame-Proof.

Both the PD663 and PD663-SS are easy to install and program, and they can be seen in a variety of lighting conditions, even in bright sunlight. The ProtEX-Lite meters will operate down to -40°C and the PD663-SS stainless steel version can be installed in areas where the temperature gets as cold as -55°C, however, the display will cease functioning.

The fact that these meters are loop-powered means that there is no need to run additional, costly power lines into a hazardous area. The meters get all the power they need from the 4-20 mA loop and their 1.7 V drop results in a minimal burden on the loop. Loop-powered backlighting is a standard feature that allows the meters to be read in dimly lit areas. The meters feature a wide -40 to 75°C operating temperature range and are available with two 1/2" NPT or M20 threaded conduit openings and flanges for wall or pipe mounting. Calibration is a quick process involving the four internal pushbuttons. The 3½+ digits display on the ProtEX-Lite will read up to 2999.

Physical Features

Electronics Module

The ProtEX-Lite electronics module is housed in a plastic enclosure that provides a degree of environmental protection for the electronics circuitry. The module is mounted to the enclosure with spring-loaded thumbscrews and can be oriented in 0°, 90°, 180°, or 270° increments. Connections are made to a removable screw terminal block.

PD663 Electronics Module

Easy Pipe Mounting

The ProtEX-Lite comes with cast-in mounting flang-es. These allow easy mounting to walls or pipes us-ing the PDA6631-SS Stainless Steel U-Bolt Kit for a 1.5” pipe or the PDA6863-SS Stainless Steel Pipe Mounting Kit for a 2” pipe. A slot on the back of the enclosure makes it easy to center the unit on a pipe.

PDA6631-SS 1.5 inch U-Bolt Kit

PDA6631-SS 1.5" U-Bolt Kit

PDA6863-SS Pipe Mounting Kits

PDA6863-SS 2" Pipe Mounting Kit


Rotatable Display Module

The display module can be rotated in 90° increments providing added mounting flexibility. Plus the various conduit connections allow a variety of installation options.

PD663 Display Rotates in 90° Increments

Programming

The PD663 comes calibrated and scaled at the factory to display a 4.00 to 20.00 mA signal on startup. To change the scaling, follow along using the 4 button interface.

Programming the PD663

General

Display0.6" (15.2 mm) LCD, 3½+ digits;
-1999 to 2999
Loop-Powered BacklightPowered directly from the 4-20 mA loop, no batteries required. Backlight can be enabled or disabled via alternative wiring of terminal block. The display brightness will increase as the input signal current increases.
Display Update Rate2 Updates/Second
Display OrientationDisplay may be mounted at 90° increments up to 270° from default orientation.
OverrangeDisplay flashes 2999
UnderrangeDisplay flashes -1999
Programming Method4 Internal pushbuttons (behind glass)
Noise FilterProgrammable HI, LO, or OFF
RecalibrationRecalibration is recommended at least every 12 months.
Max/Min DisplayMax/Min readings reached by the process are stored until reset by the user or until power to the meter is turned off.
Non-Volatile MemoryAll programmed settings are stored in nonvolatile memory for a minimum of ten years if power is lost.
Normal Mode Rejection64 dB at 50/60 Hz
EnvironmentalOperating temperature range: -40 to 75°C
Storage temperature range: -40 to 75°C
Installation temperature range: -55 to 75°C (Stainless Steel Models Only)
Relative humidity: 0 to 90% non-condensing
Printed circuit boards are conformally coated.
ConnectionsScrew terminals accept 12 to 22 AWG wire
MountingMay be mounted directly to conduit.
Two mounting holes for 1.5" pipe or wall mounting.
Tightening TorqueScrew terminal electrical connectors: 4.5 lb-in (0.5 Nm)
Overall Dimensions4.30" x 4.27" x 3.66"
(109 mm x 108 mm x 93 mm)
(W x H x D)
WeightAluminum Models: 2.45 lbs (40 oz, 1.13 kg)
Stainless Steel Models: 5.00 lbs (80 oz, 2.3 kg)
Warranty3 years parts and labor. See Warranty Information and Terms & Conditions on www.predig.com for complete details.

Input

Input4-20 mA
Accuracy±0.05% of calibrated span ±1 count
FunctionLinear (2 to 32 points) or square root
Temperature Drift50 PPM/°C from -40 to 75°C ambient
Decimal PointUser selectable decimal point
Minimum SpanInput 1 & Input 2: 0.40 mA
Calibration RangeAn Error message will appear if input 1 and input 2 signals are too close together.
Input Range
4-20 mA
Minimum Span Input 1 & Input 2
0.40 mA
Maximum Voltage Drop & Equivalent ResistanceWithout BacklightWith Loop Powered Backlight
1.7 VDC @ 20 mA4.7 VDC @ 20 mA
85 Ω @ 20 mA235 Ω @ 20 mA
Input OverloadOver current protection to 2 A max.
HART TransparencyThe meter does not interfere with existing HART communications; it displays the 4 20 mA primary variable and it allows the HART communications to pass through without interruption.
The meter is not affected if a HART communicator is connected to the loop.
The meter does not display secondary HART variables.

Enclosure

MaterialPD663: ASTM A413 LM6 die-cast aluminum, copper-free, enamel coated
PD663-SS: ASTM A743 CF8M investment-cast 316 stainless steel
Gasket (O-Ring)Fluoroelastomer
RatingNEMA 4X, IP68 Explosion-proof
ColorAluminum Models: Blue
Stainless Steel Models: Silver
WindowBorosilicate glass
ConduitsPD663-0L0-00 and PD663-0K0-00: Two 1/2" NPT
PD663-0K0-SS: Two 1/2" NPT
PD663-0K0-SS-M20: Two M20
FlangeBuilt-in flange for wall and pipe mounting.
Tamper-Proof SealCover may be secured with tamper-proof seal.
ATEX & IECEx
(enclosure only)
Flameproof protection
ATEXII 2GD
Ex db IIC Gb
Ex tb IIIC Db
IP66/IP68
Tamb: -55°C to +85°C
Certificate No.: Sira 19ATEX1252U
Certificate No.: IECEx SIR 19.0075U
CSA
(enclosure only)
Class I, Division 1, Groups A, B, C, D
Class II, Division 1, Group E, F, G
Class III
Ex db IIC Gb
Ex tb IIIC Db
Class I, Zone 1, AEx db IIC Gb
Zone 21, AEx tb IIIC Db
IP66/IP68/TYPE 4X
Tamb: -55°C to +85°C
Certificate No.: 80011200
UL
(enclosure only)
Class I, Division 1, Groups A, B, C, D
Class II, Division 1, Groups E, F, G
Class III
Class I, Zone 1, AEx db IIC Gb
Zone 21, AEx tb IIIC
Ex db IIC Gb
Ex tb IIIC Db
IP66/IP68/TYPE 4X
Tamb: -55°C to +85°C
Certificate Number: E518920
Note: The above approvals are for the enclosure only. See below for approval on the entire instrument.

Product Ratings & Approvals

(Aluminum Models Only)

FM Explosion-proof for use in:
Class I, Division 1, Groups B, C and D
Dust-ignition proof for use in:
Class II/III, Division 1, Groups E, F and G; T6 Flame-proof for use in:
Class I, Zone 1, AEx d Group IIC; T6
Protection by Enclosure:
Zone 21, AEx tb IIIC; T85°C
Ta = -40 to 75°C.
Enclosure: Type 4X, IP66.
Certificate number: 3040391
CSA
Explosion-proof for use in:
Class I, Division 1, Groups B, C and D
Dust-ignition proof for use in:
Class II/III, Division 1, Groups E, F and G; T6
Flame-proof for use in:
Zone 1, Ex d IIC T6
Ta = -40 to 75°C.
Enclosure: Type 4X & IP66/IP68.
Certificate number: 2325749
ATEXII 2 G D. Flame-proof for use in:
Zone 1, Ex d IIC T6 Gb
Protection by Enclosure for use in:
Dust Atmospheres (Zone 21)
Ex tb IIIC T85°C Db IP68.
Ta = -40°C to +75°C
Certificate number: Sira 10ATEX1116X
IECExFlame-proof for use in:
Zone 1, Ex d IIC T6 Gb
Protection by Enclosure for use in:
Dust Atmospheres (Zone 21)
Ex tb IIIC T85°C Db IP68.
Ta = -40°C to +75°C
Certificate number: IECEx SIR 10.0056X

Product Ratings & Approvals

(Stainless Steel Models Only)

CSA
Explosion-proof for use in:
Class I, Division 1, Groups B, C and D
Dust-ignition proof for use in:
Class II/III, Division 1, Groups E, F and G; T6
Flame-proof for use in:
Zone 1, Ex d IIC T6
Ta = -55 to 75°C.
Enclosure: Type 4X & IP66/IP68.
Certificate number: 2325749

Dimensions

PD663 Dimensions - Front
PD663 Dimensions - Side
PD663 Dimensions - Top
PD663 CAD Drawings

Connections

PD663 Connector Labeling

Wiring Diagrams

For existing applications, one of the great benefits of loop-powered meters is that they get their power directly from the 4-20 mA loop and thus require no additional wiring. All a user has to do is break the existing loop and wire in the meter.

PD663 Connections with Backlight

4-20 mA Input Connection with Backlight

PD663 Connections without Backlight

4-20 mA Input Connection without Backlight

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