Emerson PN 51A-54epH Marine Instruments User Manual

Instruction Sheet

PN 51A-54epH/rev J

October 2010

Model 54e pH/ORP pH/ORP HART Analyzer/Controller

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Rosemount Analytical designs, manufactures, and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you must properly install, use, and maintain them to ensure they continue to operate within their normal specifications. The following instructions must be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount

Analytical products. Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life; personal injury; property damage; damage to this instrument; and warranty invalidation.

Read all instructions prior to installing, operating, and servicing the product. If this Instruction Manual is not the correct manual, telephone 1-949-757-8500 and the requested manual will be provided. Save this Instruction Manual for future reference.

If you do not understand any of the instructions, contact your

Rosemount representative for clarification.

Follow all warnings, cautions, and instructions marked on and supplied with the product.

Inform and educate your personnel in the proper installation, operation, and maintenance of the product.

Install your equipment as specified in the Installation

Instructions of the appropriate Instruction Manual and per applicable local and national codes. Connect all products to the proper electrical and pressure sources.

To ensure proper performance, use qualified personnel to install, operate, update, program, and maintain the product.

When replacement parts are required, ensure that qualified people use replacement parts specified by Rosemount.

Unauthorized parts and procedures can affect the products performance and place the safe operation of your process at risk. Look alike substitutions may result in fire, electrical hazards, or improper operation.

Ensure that all equipment doors are closed and protective covers are in place, except when maintenance is being performed

by qualified persons, to prevent electrical shock and personal

Making cable connections to and servicing this instrument require access to shock hazard level voltages which can cause death or serious injury, therefore, disconnect all hazardous voltage before accessing the electronics.

Relay contacts made to separate power sources must be disconnected before servicing.

Electrical installation must be in accordance with the

National Electrical Code (ANSI/NFPA-70) and/or any other applicable national or local codes.

Unused cable conduit entries must be securely sealed by non-flammable closures to provide enclosure integrity in compliance with personal safety and environmental protection requirements. Use NEMA

4X or IP65 conduit plugs supplied with the instrument to maintain the ingress protection rating (IP65).

For safety and proper performance this instrument must be connected to a properly grounded threewire power source.

Proper relay use and configuration is the responsibility of the user. No external connection to the instrument of more than 60VDC or 43V peak allowed with the exception of power and relay terminals. Any violation will impair the safety protection

Do not operate this instrument without front cover secured. Refer installation, operation and servicing to qualified personnel.

This product is not intended for use in the residential, commercial or light industrial environment per certification to EN50081-2.




Enclosure: Epoxy-painted aluminum

NEMA 4X (IP65)

144 X 144 X 131 mm, DIN size (5.7 X 5.7 X 5.2 in.)

Front Panel: Membrane keyboard with tactile feedback and user selectable security. Light gray, blue and white overlay

Light gray enclosure, dark gray bezel

Display: Back-lit dot matrix LCD (7.0 x 3.5 cm), blue on gray-green

The display contrast is compensated for ambient temperature.

Relay Contacts: Relays 1-3: Epoxy sealed form A contacts, SPST, normally open

Relay 4: Epoxy sealed form C, SPDT

Weight/Shipping Weight: 1.8 kg/2.3 kg (4 lb/5 lb)

Process Variable Character Height: 16mm (0.6 in.)

Electrical Classification:

Class I, Division 2, Groups A, B, C, & D.

T5 Ta=50C. Dust ignition proof: Class II,

Division 1, Groups E, F, & G; Class III.


Max. relay contact rating: 28 Vdc; 110 Vac;

230 Vac; 6 amps resistive

FM: Max. relay contact rating: 28 Vdc resistive

150 mA - Groups A & B;

400 mA - Group C;

540 mA - Group D

Code -01: 100 - 127 VAC, 50/60 Hz 6%, 6.0 W

200 - 253 VAC, 50/60 Hz 6%