Delta Controls DZNR-768 Manuale utente

DZNR-768

Installation Guide

Edition 1.5

Page 2 of 28 DZNR-768 Revision 1.2 Installation Guide

Document Edition 1.5

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All other trademarks are the property of their respective owners.

Document Edition: 1.5

Updated on: December 23, 2016

DZNR-768 Revision 1.2 Installation Guide Page 3 of 28

Document Edition 1.5

Contents

Contents .....................................................................................................................................3

Product description....................................................................................................................5

Package contents ....................................................................................................................6

Related documents .................................................................................................................6

Cautions or warnings ..............................................................................................................6

Mounting ....................................................................................................................................7

Board layout...............................................................................................................................8

Repeater configuration ..............................................................................................................9

Baud rate jumper ....................................................................................................................9

Fixed baud rate selection.....................................................................................................9

Auto baud rate selection......................................................................................................9

Data wires termination jumper .............................................................................................10

MS/TP 2 WIRE termination ................................................................................................10

MS/TP RJ-45 termination ..................................................................................................10

Wiring general..........................................................................................................................11

Power and grounding ...............................................................................................................12

Network layout.........................................................................................................................14

Example network layout diagram..........................................................................................15

MS/TP 2 WIRE segment.........................................................................................................16

Shield continuity and termination ......................................................................................16

MS/TP RJ-45 segment...........................................................................................................17

Segment length calculation ...............................................................................................17

Contents

Page 4 of 28 DZNR-768 Revision 1.2 Installation Guide

Document Edition 1.5

DZNR label ...............................................................................................................................18

Status indicators ......................................................................................................................19

Diagnostics and troubleshooting..............................................................................................20

DZNR power-up sequence.....................................................................................................20

Recommended diagnostic procedure ....................................................................................20

Advanced diagnostics............................................................................................................22

Segment lockout................................................................................................................22

Troubleshoot complex communications problems ............................................................22

Product specifications ..............................................................................................................24

Document revision history .......................................................................................................27

DZNR-768 Revision 1.2 Installation Guide Page 5 of 28

Document Edition 1.5

Product description

The DZNR-768 (Delta Zone Network Repeater-768) is a four-port repeater that extends the

number of devices on a BACnet RS-485 MS/TP network and improves the signal quality on the

network.

The DZNR-768 divides a network into four segments allowing a maximum of 64 devices per

segment and a total of 99 devices per network.

Each segment can accommodate either the quick-connect MS/TP RJ-45 cabling used on the

DZNT-VAV product or standard MS/TP 2 WIRE cabling.

The DZNR-768 continuously monitors network traffic and uses its built-in diagnostics and

LEDs to provide a quick view of the status of every connected device. 17 general status LEDs

and 101 individual device LEDs allow you to diagnosis and troubleshoot network problems

visually.

This document describes the Revision 1.2 DZNR-768 which was released in 2013. Throughout

this document DZNR means DZNR-768.

DZNR-768 Rev 1.2

Product description

Page 6 of 28 DZNR-768 Revision 1.2 Installation Guide

Document Edition 1.5

Package contents

•Product: DZNR-768, Rev. 1.2

Related documents

•Delta Controls Wiring and Installation Guidelines

Cautions or warnings

This controller is an Electro-statically sensitive device. Proper ESD protection such as a

ground strap is required when installing this product so that damage to the product

does not occur.

Equipment damage or loss of data may occur if these procedures are not followed as

specified.

Installations requiring CE conformance:

All wiring for CE rated products must use an extra low voltage (SELV) or protective

extra low voltage (PELV) transformer. Use safety-isolating transformers, (Class II

transformer) per EN61558. The transformer must be rated for 100% duty cycle.

DZNR-768 Revision 1.2 Installation Guide Page 7 of 28

Document Edition 1.5

Mounting

The DZNR-768 includes a plastic enclosure that can be mounted quickly with two screws or

snapped into 35mm DIN rail. Mount the DZNR in an appropriate location near the system

controller in an enclosure that meets code requirements.

Dimension

in.

A 107 4 1/4

1 15/16

192

7 9/16

D 204 8 1/16

218

8 9/16

PCB width

100

3 15/16

PCB length 184 7 1/4

Board layout

Page 8 of 28 DZNR-768 Revision 1.2 Installation Guide

Document Edition 1.5

Board layout

Do not wire both MS/TP 2 WIRE and MS/TP RJ-45 wiring styles on the same segment.

Only the MS/TP 2 WIRE or MS/TP RJ-45 may be used on one segment.

DZNR-768 Revision 1.2 Installation Guide Page 9 of 28

Document Edition 1.5

Repeater configuration

The DNZR-768 requires the following five jumper settings.

•Baud rate

•Data wires termination for segment 1

•Data wires termination for segment 2

•Data wires termination for segment 3

•Data wires termination for segment 4

Baud rate jumper

The DZNR baud rate is set by positioning a jumper across the appropriate speed pins. Fixed

speeds range from 9600 to 76800 bps, or the Auto Baud setting may be used.

The same baud rate must be used for all network segments.

If multiple jumpers are in place or no jumper is in place, the DZNR sets its baud rate to 76800

bps.

Fixed baud rate selection

Place one jumper for the chosen baud rate from 9600 to 76800 bps. The DZNR operates only at

that baud rate. The LED adjacent to the selected speed is illuminated

AUTO

76800

38400

19200

9600

Auto baud rate selection

Place one jumper on the AUTO position. The DZNR attempts to set its baud rate to match the

baud rate of the controller on segment 1. If no device is connected to Segment 1, then the

DZNR sets its baud rate to 76800. The LED adjacent to the detected speed is illuminated.

Repeater configuration

Page 10 of 28 DZNR-768 Revision 1.2 Installation Guide

Document Edition 1.5

Data wires termination jumper

The segment data wires are terminated differently for MS/TP 2 WIRE and for MS/TP RJ-45.

See the corresponding section below for a description of the proper termination.

Proper termination of the network data wires ensures network stability and helps to prevent

damage to controllers during high electrical activity.

MS/TP 2 WIRE termination

The data wires at both ends of an MS/TP 2 WIRE segment must be terminated to ensure

reliable operation. The DZNR provides a built-in jumper-selectable termination for the data

wires of each segment.

For MS/TP 2 WIRE, set the jumper for the segment to the TERM position. Terminate the data

wires at the last node on the segment with a TRM-768. The following diagram shows the

proper termination for both the data wires and the shield.

RS-485 port

-MS/TP 2 WIRE port

Last node

on segment

Keep stub cable length

as short as possible

GND

TRM-768

Shield

+DZNR with TERM

jumper set to enable

built-in segment

termination

Shield is not grounded

at this end of segment

MS/TP RJ-45 termination

For MS/TP RJ-45, remove the jumper for the segment or set it to the non- TERM position.

Devices that use MS/TP RJ-45 networking include built-in distributed termination components.

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