Emerson Rosemount 8712C Guida alla configurazione

Manual Supplement

00809-0200-4661, Rev AA

April 2004 Rosemount 8712D

www.rosemount.com

Upgrading the Rosemount 8712C to a 8712D

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1

DC Powered Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1

AC Powered Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

OVERVIEW The Rosemount 8712C and 8712U transmitters are being obsoleted, and

replaced with a new revision, the 8712D. A summary of the improvements

can be found in the Technical Data Sheet (TDS) (00816-0100-4661). The

8712D was developed to be a direct replacement for the 8712C and 8712U.

The 8712D boards can be retrofitted into existing 8712C and 8712U

transmitter housings with minimum changes. The new 8712D boards work

with existing LOI’s with no modification. From a service standpoint, there are

two changes to be aware of:

• The 8712D requires a new DD. This DD has been distributed to

Service. The TDS 00816-0100-4661 includes directions to determine if

the existing 275 DD’s need to be upgraded.

• The 8712D boards come in two versions, AC (8712-0822-0001) and

DC (8712-0822-0010) powered. This eliminates the separate large

transformer previously mounted in the transmitter housing of the AC

powered units.

DC POWERED UNITS The 8712D DC (8712-0822-0010) electronics are a drop in replacement for

the electronics used in an 8712C DC powered transmitter.

Figure 1-1. 8712D DC Powered

Transmitter

New Wiring Harness (8712-0529-0002)

8712-07A.EPS

DC 8712D

Electronics

(8712-0822-0010)

White

Black

Green

Terminal

Block

Assembly

Manual Supplement

00809-0200-4661, Rev AA

April 2004

Rosemount 8712D

S-2

AC POWERED UNITS This procedure describes how to upgrade an 8712C AC powered transmitter

to the 8712D AC powered electronics.

1. Disconnect power on the transmitter.

2. Remove 8712C Electronics (main board) from transmitter housing.

3. Remove 8712C line transformer and wiring harness from transmitter

housing.

4. Install 08712-0529-0002 wiring harness.

5. Install AC powered 8712D electronics (8712-0822-0001).

NOTE

Only use AC power with 8712-0822-0001 electronics.

Table 1-1. 8712-0833-0001 Kit

Contents Item Number Quantity Description

C119980504-0104 1 SCREW, PHM ZNC PLTD, 8-32, 1/4, SLF LKG, TP 1

C091400022 1FUSE 250V, 1A, QUICK, AGC 1

08712-0667-0111 1 LABEL, WIRING 8712D, AC TERMAL PRINTED

08712-0822-0001 1CKT CD ASSY 8712D (AC PWR)

C103680031 1 WASHER, METAL LOCK, INT, NO8

C099830007 4STANDOFF HEX, M-F, SST, 6-32X1/4, X7/8

08712-0529-0002 1 WIRING ASSY 8712D ELECTRONICS, LOCK

08712-0823-0001 1SHIELD PLASTIC, SNAP-FIT, ABS, BLACK

08712-0571-0004 1 LABEL WARNING, WIRING COMPARTMENT

Manual Supplement

00809-0200-4661, Rev AA

April 2004

S-3

Rosemount 8712D

Figure 1-2. 8712C AC Powered

Transmitter

Figure 1-3. 8712D AC Powered

Transmitter

8712-06A.EPS

8712C

Electronics

White

Black

Terminal

Block

Assembly

Green 8712C Transformer Wiring

8712C

Transformer

New Wiring Harness (8712-0529-0002)

8712-07A.EPS

AC 8712D

Electronics

(8712-0822-0001)

White

Black

Green

Terminal

Block

Assembly

Emerson Process Management

Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc.

PlantWeb is a registered trademark of one of the Emerson Process Management group of companies.

All other marks are the property of their respective owners.

¢00809-0200-46611¤

Manual Supplement

00809-0200-4661, Rev AA

April 2004

Rosemount 8712D

Emerson Process Management

Flow

Groeneveldselaan 6-8

3903 AZ Veenendaal

The Netherlands

T 31 (0) 318 549 549

F 31 (0) 318 549 559

T 0800-966 180 (U.K. only)

F 0800-966 181 (U.K. only)

Emerson Process Management

Asia Pacific Private Limited

1 Pandan Crescent

Singapore 128461

T (65) 6777 8211

F (65) 6777 0947

AP.RMT[email protected]

Emerson Process Management

Rosemount Inc.

8200 Market Boulevard

Chanhassen, MN 55317 USA

T (U.S.) 1-800-999-9307

T (International) (952) 906-8888

F (952) 949-7001

www.rosemount.com

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