Rice Lake EL232 User Manual

EL232 XPCD

Explosion Proof Remote Display

Installation Manual

16942

Contents

About This Manual................................................................................................................................... 1

1.0 Introduction.................................................................................................................................. 5

1.1 System Limitations and Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2 Front Panel Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.0 Installation and Wiring................................................................................................................ 7

2.1 EL232 XPCD Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1.1 Mounting and Mounting Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Sealoff Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 Cabling and Conduit Runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.1 Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.2 Conduit Runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4 AC Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.0 Indicator Setup........................................................................................................................... 12

3.1 Serial Data Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1.1 Condec Data Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1.2 Electroscale Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1.3 Analogic Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1.4 Cardinal Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Serial Data Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2.1 RS232 C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2.2 20 mA Active Current Loop Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2.3 20 mA Passive Current Loop Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.3 Configuration of the EL232 XPCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.3.1 Loss of Signal Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.4 Serial Data Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.0 EL232 XPCD Operation............................................................................................................... 19

4.1 Lamp Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.2 Software Revision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.3 Current Baud Rate Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.4 Input Signal Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.5 Indicator Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.6 Receiving Data for the First Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.0 Appendix.................................................................................................................................... 21

5.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2 Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

EL232 XPCD Limited Warranty............................................................................................................... 23

Copyright © 2002 Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.

Specifications subject to change without notice.

March 2002

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ES232 XPCD Installation Manual

About This Manual

The EL232 XPCD explosion proof remote display represents the latest in state-of-the-art microprocessor
technology specifically applied to the explosion proof weighing marketplace. This EL232 has been modified for
use in a hazardous electrical environment.

This manual provides information on installation of the EL232 XPCD. The installer should be familiar with the
National Electrical Code and RP 12.6 ( Recommended Practice ) requirements for installation of equipment in
hazardous areas (NEC Article 504, Intrinsically Safe Systems ) published through the Instrument Society of
America.

This equipment is intended only for industrial applications.

Warning

Improper specification, installation, or service of this equipment could result in personal injury or property
damage.

Read all of the manual prior to installation. Do not assume that all hazardous area installations are identical.
Do not begin installation until all safety procedures are in place including lockouts, additional ventilation, or
washdowns. Make sure plant safety personnel have checked the area in which you will be working and have
officially declared it safe for work to proceed.

All explosion proof enclosures must remain closed unless being serviced by qualified personnel in an area
which safety inspectors have tested and declared safe. All other openings have sealoff fittings or plugs
provided. Each opening must have a sealoff fitting or plug correctly installed in it. Sealoff installation is
critical. Maximum voltage inside of enclosure must not exceed 250VAC.

The illustrations shown on the following pages represent a basic explosion proof flame control theory
(XPCD).

This instrument and accompanying equipment must be installed and serviced by an
authorized technician in accordance with the instructions provided in this manual.

1

2

Enlarged view

below

Explosion

HAZARDOUS

AREA

Cooling from

conduction of heat

along the threads

There must be a minimum of five full

threads of engagement of a 2–A

2–B fit for a Group C enclosure.

Group B increases this to eight full

threads of engagement.

Cross–section of a

shaft-type threaded

operator

Propagation of gas due to

pressure from an internal

explosion is along the

threads

Lower

temperature

gases

High temperature

gases

Shaft clearance

not to exceed 0.00033”

INSIDE OF

ENCLOSURE

The push buttons, rotary switches and sealing fittings are all attached to the enclosure via drilled and
tapped holes in the enclosure. Just as with the flange, all threaded operators and fittings carefully control
the flame path.

EL232 XPCD Installation Manual

Enlarged view

below

Explosion

High temperature

gases

Gasket

INSIDE OF

ENCLOSURE

Propagation of gas due to

pressure from an internal

explosion

The distance from the boundary of

the inside of the enclosure to the

gasket is known as the Flame Path.

This distance must be at least 1" for

Group C throughG.

For clarity, the slope of the flange
faces has been greatly enhanced

(Typically, the slope is .0015"/inch)

Cooling from

expansion of gas

(Boyle’s Gas Law)

Lower

temperature

gases

HAZARDOUS

AREA

The design intent of an explosion proof enclosure is not to contain an explosion, but to control it. The flame
path is carefully controlled at the flanges. This insures that if an explosion occurs, any gases that escape will
be cooled to a temperature below the ignition point of any atmosphere specified within that enclosure’s
rating.

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EL232 XPCD Installation Manual

1.0 Introduction

The EL232 XPCD is a high performance serial remote data display. It receives serial ASCII data (20 mA current
loop or RS-232), and displays weight data on a 8" LED display. Five LED status indicators are provided for Lbs,
Kg, Gross, Net, and no signal. (see Figure 1-1 on page 6).

The EL232 XPCD supports twelve scale formats which include:

• UMC Series

• General Freedom I and II

• Electroscale 560

•A & D Instruments 4322, 4323, 4316

•Weightronix WI-110 and WI-120

•Toledo indicators with “High speed data format”

• Flex-weigh DWM-4

• Analogic AN5315, AN5316, AN5322

• Masstron M-2500 and M-5000

•Fairbanks 90-164 series

• Streeter Richardson 9000

• Cardinal 738

• Instruments with programmable ASCII output

• Generic smart receiver mode

1.1 System Limitations and Restrictions

The following items represent limitations and restrictions on the use of the EL232 XPCD:

• All wiring, connections, conduit and grounds must comply with the National Electrical Code.

• No modifications can be made in the field.

• It is mandatory to return the EL232 XPCD to Rice Lake Weighing Systems for service.

Introduction

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