BRONKHORST®

1 8

2 FIELD BUS INSTALLATION

2.1 General

Modbus is a 3-wire, RS485-based field bus communication system for parameter value exchange. In this system each

instrument / device is equipped with a micro-controller for its own dedicated task but also for exchanging parameter

value information with other instruments / devices connected to the same Modbus system.

The implementation of the Modbus interface is based on the following standards:

[1] Modbus_Application_Protocol_V1_1b.pdf December 28, 2006

[2] Modbus_over_serial_line_V1_02.pdf December 20, 2006

Physical layer and communication protocol are detected automatically upon reception of messages.

These messages must be sent using the correct combination of physical layer and communication

protocol. After every power-up the communication detection mode is active.

Bronkhorst advices not to use more as 127 instruments in one bus system.

2.2 Modbus connector

2.2.1 Shielded RJ45 modular jack

Warning: this device uses a vendor specific pin layout on the RJ45 connector that differs from the

Modbus recommended pin layout.

The shielded RJ45 modular jack connector (for non IP65 applications) has the following pin configuration:

RJ45 Connector

Receptable

Pin number

Description

1 +15…24Vdc supply

2 0V

3 Shield

4 0V

+15…24Vdc supply

6 0V (Modbus common)

7 D0 Modbus (A/A')

8 D1 Modbus (B/ B')

The maximum contact rating for RJ45 connectors is 1.5A.

For MASS-VIEW instrument see manual 9.17.051 for pin layout.

http://www.bronkhorst.com/en/downloads/instruction_manuals/

Page 7 Modbus interface 9.17.035

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Inhaltsverzeichnis

Parts List

TYPES OF SCREWS

BASE LAYOUT (BC-1 AND BP-1)

12'

15'

FLOOR KIT (OPTIONAL)

ERECTING COLUMNS (C-1)

RAFTERS (R-1)

EAVE CHANNEL (EC-1)

RAFTERS (R-2)

MAKE SURE THE ASSEMBLY

IS SQUARE AND LEVEL

ROOF PURLIN

DOOR AND DOOR TRIM

MID-GIRTS

Sidewall

SHEETING SCREW PLACEMENT

SHEETING

TOP VIEW

SHEETING SIDEWALL

SHEETING ENDWALL

CORNER TRIM

10"

Lap TEK Screw

TEK Screw TEK Screw TEK Screw

12" 12"

36"

SHEETING THE ROOF

ROOFING TRIM DETAILS

TOTAL BUILDING MEASUREMENTS

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