User Manual

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Installation and operating instructions BM 70 A/P Page: 9 11/00

4 Output

4.1 Variants

Variants Remarks Described

in Section

Ex-e current output HART

Ex-e; active; HART

protocol;

together with switching output and digital input

4.2 + 4.4

Ex-i current output HART

intrinsically safe; passive; HART

protocol

(optionally with intrinsically safe switching output)

4.3 + 4.4

Current output Ex-e; active; non-communicable 4.5

RS 485 + current output BM70 protocol or ModBus-RTU or HART

4.6 + 4.5

PROFIBUS-PA intrinsically safe; see Supplementary Instructions -

Foundation Fieldbus (FF) intrinsically safe; see Supplementary Instructions -

All versions with HART

or BM70 protocols can be operated with the PC-CAT PC program (see Section 8.12).

Overview of digital Communication possibilities:

BM 70 A

HART specific software

and operating devices

Converter

HART-

HHC

HART Communicator

HART

FIELD COMMUNICATIONS PROTOCOL

>>>>>>

F1 F2 F 3 F4

A B C D E F G H I

7 8 9

J K L M N O P Q R

4 5 6

S T U V W X Y Z /

1 2 3

# % & < > : +

0 . _

HART-Master

Tank Inventory System

4 ... 20mA

+ HART ®

Modbus

PROFIBUS-PA

...........

Other

communication interfaces

RS 485

4mA (Ex i)

+ HART®

PC-CAT