PRECISION DIGITAL PD660 User manual

MODEL PD660 NEMA 4X

LOW COST 31/2DIGIT LOOP-POWERED METERS

www.predig.com

PRECISION DIGITAL CORPORATION

PHONE (800) 343-1001 • FAX (317) 216-1277

Specifications

INPUT: 4-20 mA @ 24 VDC Maximum

DISPLAY: Sharp, 0.5″high LCD, 31/2digits; 1999, user

selectable decimal point

CALIBRATION: 2 Step; non-interacting zero and span

CALIBRATION RANGE: 4 mA input: -500 to +500; 20

mA input: between 20 to 2000 above 4 mA display

MAXIMUM VOLTAGE DROP: 1.5 VDC @ 20 mA;

3.5 VDC @ 20 mA with backlighting option

ACCURACY: ±0.1% of span, ±1 count

CONNECTIONS: Removable screw terminal block

OPERATING TEMPERATURE RANGE: -40 to 80°C

APPROVAL: The PD661-N-EX and PD661-B-EX have

been FM and CSA certified as explosion-proof for Class I,

Division 1, Groups B, C, and D; dust-ignition proof for Class

II, Division 1, Groups E, F, and G; and Class III hazardous

(classified) locations. LCIE (CENELEC) certified as flame-

proof, EEx d IIC T6.

PD660 ENCLOSURE: High impact-resistant ABS plastic

body, clear ABS plastic cover; NEMA 4X; 1/2″conduit hole

provided at base. May be provided on back for panel mount-

ing applications, call factory for details.

PD661 ENCLOSURE: Cast aluminum, approved by FM

and CSA; NEMA 4, 7 and 9; Class I, Groups B, C, and D;

Class II, Groups E, F, and G; and Class III. Two 1/2″NPT

holes provided.

LOOP-POWERED BACKLIGHTING OPTION: Factory

installed only. Powered directly off the 4-20 mA loop, no bat-

teries required. The display brightness will increase as the

input signal current increases.

WARRANTY: 1 year parts and labor

EXTENDED WARRANTY: May be extended an additional

12 months by returning the Product Registration Form within

2 months from date of purchase. Go to www.predig.com for

online registration.

Model Description

PD660-N NEMA 4X Loop-Powered Meter

PD660-B NEMA 4X Loop-Powered Meter

with Loop-Powered Backlighting

PD661-N Explosion-Proof Loop-Powered Meter

PD661-B Explosion-Proof Loop-Powered Meter

with Loop-Powered Backlighting

PD661-N-EX FM, CSA, & CENELEC Explosion-Proof Meter

PD661-B-EX FM, CSA, & CENELEC Explosion-Proof Meter

with Loop-Powered Backlighting

PDA6604 Panel Mounting Kit

(Panel Mounting Kit does not provide NEMA 4X seal to the panel)

PDA6845 2″Pipe Mounting Kit

(Available for PD660 Only)

ORDERING INFORMATION

•

4-20 mA Input

•

31/2Digit Display

•

Easy Calibration and Installation

•Loop-Powered Backlighting

Option

•Wide Operating Temp Range:

-40 to 80°C

MODEL PD661 EXPLOSION-PROOF

PRECISIONDIGITAL

PRECISION DIGITAL

Please visit the Precision Digital website at

www.predig.com

for complete information on the entire line of Precision Digital

products, technical information and much more.

YOUR LOCAL DISTRIBUTOR IS:

FM, CSA

and

CENELEC

Approved

Models

FM, CSA

and

CENELEC

Approved

Models

www.predig.com

LOW COST 31/2DIGIT LOOP-POWERED METERS

PRECISION DIGITAL CORPORATION

CORPORATE HEADQUARTERS

19 Strathmore Road • Natick MA • 01760 • USA • Tel: (800) 343-1001 • Fax: (317) 216-1277

DECIMAL POINT SELECTION

The decimal point jumper array (JP1) is located in the upper

right corner of the display board. Place a jumper across the

bottom pins for a display of 199.9, across the middle pins for

a display of 19.99, and across the top pins for a display of

1.999.

CALIBRATION

The LO calibration control (R11) is located below the display

and the HI calibration control (R9) is located to the right of the

display.

Apply a 4 mAinput signal and adjust the LO control to display

the desired reading. Next, apply a signal between 16 and 20

mA and adjust the HI control to display the desired reading.

Complete the calibration procedure by making any minor

adjustments to the LO and HI controls.

DIMENSIONS

PD660

PD661

SETUP

The only tools needed for calibration are a calibrated current

source and a screwdriver.

PD660 INSTALLATION

Installation of the PD660 involves removing the display board

and screw terminal connector. It may also be necessary to

remove the input signal board depending on type of conduit

hubs used.

PD661 INSTALLATION

The PD661 has no provisions for wall mounting. Installation

of the unit is accomplished by using the two 1/2″NPT conduit

holes provided with 1/2″NPT fittings.

DISASSEMBLY

The removable screw terminal connector is located on the

lower circuit board. To access these input terminals it is neces-

sary to remove the display board from the input signal board.

This is done by first removing the enclosure cover. Next,

loosen the 2 screws that hold the display board to the standoffs.

Rotate the display board so the right side comes off the stand-

off first, proceed to remove the display board from both stand-

offs. Be careful to avoid contact of the display with rough

surfaces. The display board may be disconnected from the rib-

bon cable simply by pulling up on the ribbon cable connector

located above the display.

Connect a 4-20 mA input signal to terminal J5 located on the

input signal board as shown below.

When reassembling the circuit boards

be careful NOT to over-tighten

the screws.

Ribbon

Cable

Connector

Display Board

Input Signal Board

Pollution Degree 2

Installation Category II

Screw

Terminal

Connector J5

Loop Power

Supply

Signal Input

Connections

4-20 mA

Transmitter

Screw Terminal Connector

Balance Control (factory adjust only)

LO Calibration

Control

Calibration

Control

Decimal Point

Jumper Array

Ribbon Cable

Connector

JP1

R11

A: 4.75″(121 mm) B: 3.75″(95 mm) C: 4.5″(114 mm)

Weight: 4 lbs (1.8 kg) FM and CSA certified enclosure

CAUTION-DISCONNECT FROM SUPPLY BEFORE OPENING. KEEP COVER TIGHT WHILE CIRCUITS ARE

ALIVE. CONDUIT SEALS MUST BE INSTALLED WITHIN 18″OF THE ENCLOSURE.

ATTENTION-OUVRIR LE CIRCUIT AVANT D’ENLEVEL LE COUVERCLE GARDER LE COUVERCLE BIEN

FERME TANT QUE LES CIRCUITS SONT SOUS TENSION. UN SCELLEMENT DOIT ETRE INSTALLE A

MOINS DE 450 mm DU BOITIER.

CONNECTIONS

TOP VIEW END VIEW

Wall

Mounting

Holes

Beneath

Cover

Screws

A: 3.15″(80 mm) C: 2.36″(60 mm) E: 2.56″(65 mm)

B: 4.33″(110 mm) D: 3.54″(90 mm) F: 0.79″(20 mm)

Weight: 12 oz (340 g)

LIM660-661 Rev C 06/00

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