Delta Controls DZNR-768 User manual
DZNR-768
Installation Guide
Edition 1.5
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Document Edition 1.5
Copyright
Copyright © Delta Controls Inc. All rights reserved.
No part of this document may be reproduced, transmitted, transcribed, stored in a retrieval
system or translated into any language (natural or computer), in any form or by any means,
without the prior written permission of Delta Controls Inc.
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Format (PDF) electronic format in paper format. Documents released in PDF electronic format
may be printed by end users for their own use using a printer such as an inkjet or laser device.
Authorized distributors of Delta Controls Inc. products (Delta Partners) may print PDF
documents for their own internal use or for use by their customers. Authorized Delta Partners
may produce copies of released PDF documents with the prior written permission of Delta
Controls Inc.
Information in this document is subject to change without notice and does not represent a
commitment to past versions of this document on the part of Delta Controls Inc. Delta Controls
Inc. may make improvements and/or changes to this document /the associated software/or
associated hardware at any time.
BACspec, BACstat, the Delta logo, ORCAview, ORCAweb, Earthright, enteliWEB, enteliBUS,
enteliMESH, enteliTOUCH, enteliZONE, enteliSTAT, enteliVIZ and Virtual Stat are registered
trademarks of Delta Controls Inc.
All other trademarks are the property of their respective owners.
Document Edition: 1.5
Updated on: December 23, 2016
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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
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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
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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
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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.
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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.
D
CE
A
B
Dimension
mm
in.
A 107 4 1/4
B
49
1 15/16
C
192
7 9/16
D 204 8 1/16
E
218
8 9/16
PCB width
100
3 15/16
PCB length 184 7 1/4
Board layout
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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.
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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
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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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