Precision Digital Corporation PD685 Manuel utilisateur

PD685 I.S. NEMA 4, Type 4X, IP67 Loop-Powered Meter

Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA

Tel (800) 343-1001 • (508) 655-7300

www.predig.com

Actual Size Digits

• NEMA 4, Type 4X, IP67 Loop-Powered Field-Mount Process Meter

• 4-20 mA Input

• 1.1" (28 mm) 3½ Digits LCD Display; -1999 to 1999

• 1 V Drop (4 V Drop with Backlight)

• HART®Protocol Transparent

• Loop-Powered Backlight Standard

• Operates from -40 to 75°C (-40 to 167°F)

• Coarse and Fine Zero & Span Potentiometer Adjustments for

Easy Field Scaling

• Plastic NEMA 4, IP67 Enclosure

• CSA, ATEX and IECEx Certied as Intrinsically Safe

• CE Marked

• Conformal Coated PCBs for Dust and Humidity Protection

• One ½" Conduit Hole (Rear, Top, Bottom or None)

• Pipe & Panel Mounting Kits

• Stainless Steel Tag Available

Intrinsically Safe

CSA Certified for USA and Canada as Nonarching

to Install in Division 2 Areas without Barriers

C US

www.predig.com

PD685 I.S. NEMA 4, Type 4X, IP67 Loop-Powered Meter Instruction Manual

OVERVIEW

The PD685 is an easy to use, loop-powered indicator, certified

by CSA, ATEX and IECEx as intrinsically safe. The PD685

carries international certifications under both the Class/

Division System and Zone System, and is thereby suitable for

use in gas and dust hazardous areas worldwide. For Division

2 applications where intrinsically safe interfaces are not

needed, the PD685 is able to be installed without barriers! To

achieve this ability, the PD685 underwent a special 'nonarcing

assessment' under the UL 121201 and CSA C22.2 No. 213

standards, and was determined to be a device incapable of

causing an ignition on its own. The PD685 is well-suited for

both indoor and outdoor applications and carries a variety of

environmental ratings, including NEMA 4, Type 4X and IP67.

The PD685 can be seen from considerable distance in bright

sunlight or dimly lit areas when the standard backlight feature

is activated. The fact that this meter is loop-powered means

that there is no need to run additional, costly power lines into

a hazardous area. The meter gets all of the power it needs

from the 4-20 mA loop and its 1 V (4 V with backlight) drop

results in a minimal burden on the loop. The meter features a

wide -40 to 75°C operating temperature range and is available

with a ½" conduit hole in a location of your choice for easy

installation. Calibration is a quick two-step process involving

the adjustment of only two sets of coarse and fine, non-

interacting potentiometers.

SPECIFICATIONS

Except where noted all specifications apply to operation at +25°C.

Input 4-20 mA @ 30 VDC maximum

Display

1.1" (28 mm) LCD, 3½ digits; -1999 to +1999

Backlight Powered by 4-20 mA loop. Intensity varies with

signal level

Accuracy ±0.1% FS ±1 count

Approvals

ATEX and IECEx:

Certified as intrinsically safe with entity, for use in

Equipment Group II, categories 1G (for Gas) and

1D (for Dust), suitable for Zone 0, 1 & 2 (for Gas)

and Zone 20, 21 & 22 (for Dust) classified areas,

and carrying the following markings:

II 1 GD. Ex ia IIC T4 Ga. Ex ia IIIC T135°C Da.

-40°C ≤ Ta ≤ +75°C.

ATEX Certificate Number: CML 17ATEX2113X

IECEx Certificate Number: CML 17.0052X

CSA:

Certified as intrinsically safe with entity, to U.S.

and Canadian standards for Divisions and Zones

(Gas and Dust), and carrying the following

markings:

Ex ia IIC T4 Ga; Ex ia IIIC T135°C Da; (Canada only)

Class I, Zone 0, AEx ia IIC T4 Ga; Zone 20,

AEx ia IIIC T135°C Da; (U.S. only)

Class I, Division 1, Groups A, B, C and D, T4;

Class II, Division 1, Groups E, F and G, T135°C;

Class III; Type 4X; IP67;

-40°C ≤ Ta ≤ 75°C

Certified as suitable for Division 2 without barriers,

to U.S. and Canadian Standards, and carrying the

following markings:

Class I, Division 2, Groups A, B, C and D, T6;

Class II, Division 2, Groups F and G, T85°C;

Class III; Type 4X; IP67;

-40°C ≤ Ta ≤ 75°C

CSA Certificate Number: 1111348

Entity

Parameters

Ui = 30 V, Ii = 175 mA, Pi = 1 W, Ci = 0, Li = 0

See Control Drawing LIM685-2 (DW2443) for

complete installation instructions.

Decimal Point

User selectable via J2 jumper

Calibration

4-step coarse & fine control; non-interacting zero

& span

Calibration

Range

4 mA input: -1000 to +1000;

20 mA input: between 20 and 2000 counts > 4 mA

display

Display Update

Rate

2.5/second

Maximum Input

Current

30 mA

Input Overload

Protection

Over voltage protection to 30 V max (between

S+ and S-)

Maximum

Voltage Drop

1 V @ 20 mA (4 V @ 20 mA with backlight)

Operating

Temperature

-40 to 75°C

Canadian installations: -40 to 40°C.

Storage

Temperature

-40 to 85°C

Relative

Humidity

0 to 90% non-condensing.

Printed circuit boards are conformally coated.

Enclosure

Impact-resistant, glass-filled, polycarbonate

body, opaque; Impact-resistant, polycarbonate

cover, transparent; Polyurethane/polymer gasket;

Polyamide/plastic cover screws; NEMA 4, IP67

Connections Removable screw terminals accept 12 to 26 AWG

Conduit Hole

One 22 mm (0.865") conduit hole may be provided;

refer to Ordering Information to specify hole

location; request model (-Z) for no conduit. hole.

Weight

12 oz (340 g)

Warranty 2 years parts and labor. See Warranty

Information and Terms & Conditions on

www.predig.com for complete details.

www.predig.com

PD685 I.S. NEMA 4, Type 4X, IP67 Loop-Powered Meter Instruction Manual

COMPLIANCE INFORMATION

Product Markings

The PD685 will carry the following ATEX and IECEx markings:

Ex ia IIC T4 Ga

Ex ia IIIC T135°C Da

-40°C ≤ Ta ≤ +75°C; IP67

The PD685 will carry the following CSA markings:

-40°C ≤ Ta ≤ +75°C

Ex ia IIC T4 Ga;

Ex ia IIIC T135°C Da;

Class I, Zone 0, AEx ia IIC T4 Ga;

Class I, Zone 20, AEx ia IIIC T135°C Da;

Class I, Division 1, Groups A, B, C and D, T4;

Class II, Division 1, Groups E, F and G, T135°C;

Class III;

Class I, Division 2, Groups A, B, C and D, T6;

Class II, Division 2, Groups F and G, T85°C; Class III;

Type 4X; IP67

ATEX & IECEx Special Conditions for Safe Use

For European Community: The PD685 must be installed in

accordance with the Essential Health & Safety Requirements

of Directive 2014/34/EU, the product certificates CML

17ATEX2113X and IECEx CML 17.0052X, and the product

manual.

Under certain extreme circumstances, the non-metallic parts

incorporated in the enclosure of this equipment may generate

an ignition-capable level of electrostatic charge. Therefore, the

equipment shall not be installed in a location where the external

conditions are conducive to the build-up of electrostatic charge

on such surfaces. This is particularly important if the equipment

is installed in a zone 0 location. In addition, the equipment shall

only be cleaned with a damp cloth.

The cable entry into the enclosure shall be by means of

conduit or cable gland and shall provide a minimum degree of

protection of IP5X.

CSA Special Conditions for Safe Use

For North American Community: Installation and service

of this device and or associated apparatus (barrier) should

be performed only by trained service personnel, and must

be in accordance with the manufacturer’s control drawing,

Article 504 of the National Electric Code (ANSI/NFPA 70)

for installation in the United States, or Section 18 of the

Canadian Electrical Code for installations in Canada.

Under certain extreme circumstances, the non-metallic parts

incorporated in the enclosure of this equipment may generate

an ignition-capable level of electrostatic charge. Therefore,

the equipment shall not be installed in a location where the

external conditions are conducive to the build-up of electrostatic

charge on such surfaces. This is particularly important if the

equipment is installed in a zone 0 location. In addition, the

equipment shall only be cleaned with a damp cloth.

Control equipment must not use or generate more than 250 V

rms or dc with respect to earth.

Conduit hubs and cable glands shall maintain the degree of

protection, explosion protection, and environmental rating of

the PD685, and installed in accordance with the appropriate

wiring method for Class I Division 2 and Class II Division

2 locations. Wire shall be used that is rated for a minimum

temperature of 80°C.

PD685 must be installed with a certified barrier for Class II,

Division 1 locations.

For Div 2, the equipment must be connected to a certified

Class 2 power supply.

II 1 GD

C US

Warnings:

READ AND UNDERSTAND THE MANUAL BEFORE

OPERATING.

LISEZ ET COMPRENEZ LE MANUEL AVANT DE L'UTILISER

The following warnings apply to Division 2

installations only!

WARNING:

EXPLOSION HAZARD – DO NOT DISCONNECT

EQUIPMENT OR REMOVE THE COVER UNLESS

POWER HAS BEEN SWITCHED OFF OR THE AREA

IS KNOWN TO BE NON-HAZARDOUS; FRANCAIS:

“EXPLOSION DANGEREUSE - NE PAS DÉBRANCHER

L'ÉQUIPEMENT NI DÉPOSER LE COUVERCLE SAUF SI

L'ALIMENTATION A ÉTÉ COUPÉE OU SI LA ZONE N'EST

PAS DANGEREUSE.”

WARNING (FOR DIV. 2 ONLY):

THE EQUIPMENT MUST BE CONNECTED TO A

CERTIFIED CLASS 2 POWER SUPPLY; Francais:

“L'équipement doit être raccordé à une alimentation de

classe 2 CERTIFIÉE”

Application Notes:

Entity parameters must meet the following requirements for

both CSA and ATEX/IECEx applications (except in areas

where barriers are not required, as noted below):

= 30 V, li

= 175 mA, Pi

= 1 W, Ci

= 0, Li

= 0

For Division 2 Applications (North America only):

Division 2 installations do NOT require the use of

an intrinsically-safe barrier or intrinsically-safe entity

parameters.

Year of Construction:

This information is contained within the serial number with the

first four digits representing the year and month in the YYMM

format.

NOTE 1: If any of the following operations are performed

in the hazardous area, all appropriate hazardous area

procedures must be followed.

NOTE 2: To prevent damage to electronic components

caused by electrostatic discharge, a grounding strap

should be worn when servicing the display.

1. Read complete instructions prior to installation and operation of the

meter.

2. Installation and service should be performed only by trained service

personnel.

3. Substitution of components may impair hazardous location safety.

4. Service requiring replacement of internal components must be

performed at the factory.

5. Equipment contains non-metallic materials and therefore special

care and consideration should be made to the performance of these

materials with respect to chemicals which may be present in a

hazardous environment.

6. PD685 indicator does not add capacitance or inductance to the loop

under normal or fault conditions.

7. Hazardous location installation instructions for associated apparatus

(barrier) must be followed when installing this equipment.

8. For safe installation of an ATEX, IECEx, and/or CSA certified transmitter

in series with the PD685 loop indicator, the hazardous location

installation instructions for the transmitter, PD685 loop indicator, and

associated apparatus (barrier) must be compatible.

!Safety Information

www.predig.com

PD685 I.S. NEMA 4, Type 4X, IP67 Loop-Powered Meter Instruction Manual

Conduit Installation Instructions

1. Remove the printed circuit board from the enclosure.

2. Connect appropriate size conduit fittings to the hole

provided. For enclosures without a pre-drilled hole,

the installer must make a hole in accordance with the

instructions for the particular conduit fitting being installed.

3. Connect conduit (with attached hubs) to the enclosure.

Conduit hubs must be connected to the conduit prior to

being connected to the enclosure. Use only conduit hubs

that are designed to maintain NEMA 4 or IP67 ratings.

Note: Please read PD685 Intrinsic Safety Control Drawing (LIM685-2) for

more information pertaining to the conduit holes.

Mounting Instructions

1. Remove the enclosure cover from the base.

2. Insert mounting hardware into mounting holes in enclosure

base (see Figure 7).

3. Secure the enclosure base to the mounting surface using

the inserted hardware.

4. Re-attach the enclosure cover to the base.

SETUP

The only tools needed for calibration are a calibrated current

source and a small slotted/flathead screwdriver.

All controls and wiring connectors are accessed by opening the

enclosure. To access electrical connectors, remove the enclosure

cover, unscrew the two captive screws that fasten the printed

circuit board, and remove the printed circuit board from the

enclosure.

Calibration Connections

To access the input terminals it is necessary to remove the

enclosure cover and the printed circuit board. This is done by

loosening the four screws on the enclosure cover and removing

the cover. Completely loosen both thumb screws that hold the

printed circuit board to the enclosure. Turn it over to gain access

to the reverse side. Then, proceed to connect a calibrated

current source per Figure 1.

Decimal Point Selection

The decimal point jumper array J2 is located in the lower

right corner of the printed circuit board next to the display. It

is labeled DDD.D, DD.DD, and D.DDD. Place a jumper over

both pins of DDD.D for a display of 199.9, DD.DD for 19.99,

or D.DDD for 1.999.

Calibration

LO and HI coarse and fine calibration controls are located

below the display (see Figure 2). The meter is factory

calibrated to display -500 at 4 mA and 1500 at 20 mA. Use the

HI and LO COARSE controls for large range changes during

calibration and the HI and LO FINE controls for precision

changes. Apply a 4 mA signal and adjust the LO controls

to display the desired reading. Apply a signal between 16

and 20 mA and adjust the HI controls to display the desired

reading. Complete the calibration procedure by making minor

adjustments to the LO and HI controls as necessary.

Installation

Installation of the meter involves removing the printed

circuit board from its enclosure and connecting a ½" conduit

fitting to the hole provided. Refer to PD685 CSA, ATEX

and IECEx Certified Loop-Powered Meter Intrinsic Safety

Control Drawing diagrams (LIM685-2) for further details. Wall

mounting holes are located in each corner of the enclosure

(see Figure 7).

Loop Connections

Disconnect power to the loop and wire the meter as illustrated

in (Figures 3 & 4) for 2-wire transmitter configuration,

(Figures 5 & 6) for 4-wire transmitter configurations, and

the PD685 CSA, ATEX and IECEx Certified Loop-Powered

Meter Intrinsic Safety Control Drawing diagrams (LIM685-2)

supplied with the instrument. Connect the loop return wire to

S- to disable the backlight feature or connect it to B- to enable

the backlight feature.

www.predig.com

PD685 I.S. NEMA 4, Type 4X, IP67 Loop-Powered Meter Instruction Manual

HAZARDOUS AREA NON-HAZARDOUS AREA

POWER

SUPPLY

Transmitter 4-Wire

Sig+ Sig-

P+

P-

Figure 5: Control Loop Connections (4-Wire)

Figure 6: Control Loop Connections with Backlight (4-Wire)

HAZARDOUS AREA NON-HAZARDOUS AREA

POWER

SUPPLY

Transmitter 2-Wire

Figure 4: Control Loop Connections with Backlight (2-Wire)

HAZARDOUS AREA NON-HAZARDOUS AREA

POWER

SUPPLY

Transmitter 4-Wire

Sig+ Sig-

P+

P-

DIMENSIONS

Figure 7: Dimensions and Wall Mounting Information

CALIBRATED

CURRENT SOURCE

S+ Signal Positive Connection

S- Signal Negative Connection

B- Signal Negative Connection

if Using Backlight

Figure 1: Calibrator Connection

Field wiring is made to the

back side of the printed

circuit board which is

mounted in the enclosure.

J2 - Decimal Point Location Selection

R4 - HI Calibration Coarse Control

R5 - HI Calibration Fine Control

R6 - LO Calibration Coarse Control

R7 - LO Calibration Fine Control

Figure 2: Calibration Controls Location

HAZARDOUS AREA NON-HAZARDOUS AREA

POWER

SUPPLY

Transmitter 2-Wire

Figure 3: Control Loop Connections (2-Wire)

S+ Signal Positive Connection

S- Signal Negative Connection

B- Signal Negative Connection

(if using Backlight).

CONNECTIONS

• Electrostatic hazard. Clean only with a moist cloth.

Protect enclosure from exposure to chemical solvents

and excessive ultraviolet (UV) light (e.g. sunlight).

• Figures 1-6 are intended to serve as simplified wiring

diagrams for typical applications. For hazardous area

applications, the PD685 must be installed per the PD685

Intrinsic Safety Control Drawing (LIM685-2).

3.15

(80)

5.12

(130)

Wall Mounting Holes

Beneath Cover Screws

Front View

Side View

4.41

(112)

2.44

(62)

2.75

(70) 0.79

(20)

Units: Inches (mm)

PD685 I.S. NEMA 4, Type 4X, IP67 Loop-Powered Meter Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA

Tel (800) 343-1001 • (508) 655-7300

www.predig.com

LIM685_J 07/23

WARNING

Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Disclaimer

The information contained in this document is subject to change without notice.

Precision Digital Corporation makes no representations or warranties with respect to the

contents hereof, and specically disclaims any implied warranties of merchantability or

tness for a particular purpose.

Your Local Distributor is:

PD685 I.S. NEMA 4, Type 4X, IP67

Loop-Powered Meter

Model Description

Conduit Hole

Location for

½" Fitting

PD685 CSA, ATEX & IECEx Certied

Intrinsically Safe NEMA 4, IP67 Meter

with Conduit Hole Location in Bottom

of Enclosure

Bottom

PD685-X CSA, ATEX & IECEx Certied

Intrinsically Safe NEMA 4, IP67 Meter

with Conduit Hole Location in Rear of

Enclosure

Rear

PD685-Y CSA, ATEX & IECEx Certied

Intrinsically Safe NEMA 4, IP67 Meter

with Conduit Hole Location in Top of

Enclosure

Top

PD685-Z CSA, ATEX & IECEx Certied

Intrinsically Safe NEMA 4, IP67

Meter with no Conduit Hole

None

ORDERING INFORMATION

MOUNTING

Pipe Mounting Kit

The PDA6845-SS is a stainless steel pipe mounting kit

with two mounting holes. It provides all of the necessary

hardware to mount the PD685 to a 2" pipe.

Mounting Plate

U-bolt Kit

Hex Nut

Meter not included.

Panel Mounting Kit

The PDA6854 is a panel mounting kit for the PD685. It

provides all of the necessary hardware to mount the PD685

meter to an equipment panel. This panel mounting kit is not

intended to provide waterproof protection to the panel.

EU DECLARATION OF

CONFORMITY

For shipments to the EU and UK, a Declaration of

Conformity was printed and included with the product.

For reference, a Declaration of Conformity is also

available on our website www.predig.com/docs.

Accessories

Model Description

PDA6844 Panel Mount Kit

(Does not provide NEMA 4X seal to panel)

PDA6845-SS 2" Stainless Steel Pipe Mounting Kit

PDA1024-01 24 VDC Transmitter Power Supply for DIN Rail

PD420-461 4-20 mA Set Point Generator & Valve Positioner

PD9502 Low-Cost Signal Generator

PD659 Signal Isolators, Slitters, & Conditioners

PDA-SSTAG Stainless Steel Tag

Ce manuel convient aux modèles suivants

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