Technical Center

Magnetic Flowmeter wiring

Hot:16242013-11-16 00:42:34 From: FTD Automation Instruments

This article is introduced wiring of FEF Electromagnetic Flow meter

1.1 Grounding Requirement of the Flow meter

Flow meter, Medium and pipeline should be in the same electrical potential which is grounding. Proper grounding is individually grounding in the sensor side, remote version converter connect in the same point. Grounding Resistance <10ω, grounding="" wire="" is="" brv-16="" improper="" grounding="" can="" result="" in="" abnormal="" performance="" p="">

When the Flow meter is mounted in the metal pipe and the pipe without any liners, see following picture of the grounding.

Compact Version Remote Version

When the sensor is mounted in PVC Pipes, or lined metal tube, see following grounding picture

:

Compact Version Remote Version

When mounting the sensor in the Cathodic Protecion Pipe , see following picture of grounding:

Compact Version Remote Version

When mounting the flow meter in Cathodic Protecion Pipe, grounding wires should by pass the sensor and bridge joint the two flanges and isolate the cathodic protection current and sensor.

1.2 Flow meter Wiring

If mounted remotely, connection signal cables should be dedicated cables, the shorter, the better.

Excitation cables can be Y2 Type Rubber cable, the length should be the same as signal cable.

Signal cables should separate from power cable, can not be laid in the same tube, can not be laid parallel or twisted laid. They should be laid in dedicated metal tubes.

Signal cables and excitation cables should be as short as possible, redundant cable shouldn’t be rolled together, they should be cut down and re-welded, when the cable connect into the sensor electrical interface, the interface can be made into U Type to avoid raining into the sensor.

I+:

Flow Current Output

COM:

Current Output

P+

Bi-directional frequency(Pulse) Output

COM:

Frequency( Pulse) Output Ground

AL:

Lower limit Alarm Output

AH:

Upper limit Alarm Output

COM:

Alarm Output Ground

FUSE

Input Power Fuse

T+:

Communication input

T-:

Communication input

G:

RS232 Communication Ground

L1:

220V(24V) Power supply

L2:

220V(24V) Power supply

Compact Version Magnetic Flow meter Connection Terminal Diagram

SIG 1 Signal 1

SGND Signal Ground

SIG2 Signal 2

DS1 Shielded Exciting 1

DS2 Shielded Exciting 2

EXT+ Exciting Current +

EXT- Exciting Current -

VDIN Current two-wire 24V Connection Point

IOUT Analog Current Output

ICOM Analog Current Output Ground

POUT Flow Frequency(Pulse) Output

PCOM Frequency(Pulse) Output Ground

ALMH Upper limit Alarm Output

ALML Lower limit Alarm Output

ACOM Alarm Output Ground

TRX+ Communication Input

TRX- Communication Input

TCOM 232 Communication Input Ground

AH

Upper limit Alarm

T+,T-RS485

Communication +.-

I+,COM

4~20mA Current Output

SIG1,SGND,SIG2

Signal 1, Signal Ground, Signal 2

L1,L2

Power 220VAC or 24V DC

IN+

Contact Input

P+,COM

Pulse/Frequency, Communication and Alarm shared

AL

Lower limit Alarm

EXT+,EXT

Exciting Current output+,-

Explosive-proof Remote Version magnetic Flow meter Terminal Connection

DS1

Shielded Exciting 1

FDIR

Flow Direction Status +

SIG1

Signal 1

AL

Upper limit Alarm Output +

SGND

Signal Ground

AH

Lower Limit Alarm Output -

SIG2

Signal 2



DS2

Shielded Exciting 2

A

RS 485 Output +

EXT+

Exciting Current +

B

RS 485 Output -

EXT-

Exciting Current -



IN+

Contact Input +

L1

AC Power Phase Line: DC Current +

IN-

Contact Input -

L2

AC Power zero Line: DC Current -

P+

Frequency(Pulse) Output +

PE

Protection Ground

COM

Frequency(Pulse) Ounput Ground, shared with FDIR,AL,AH



Edit by FTD Automation Instruments LTD ( www.ftdinstruments.com)

FTD Automation Instruments Limited - Field Instruments © 2013 •   Support by 外贸网站建设
LiveZilla Live Chat Software