Cutler-Hammer Jonson Controls N2 User manual

Code No. LIT-1201829 For more information visit: www.johnsoncontrols.com
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N2 and XT BUS Communication
User Manual
March 2006
Supersedes January 2006
VSD IntelliPass VSD Open VSD Enclosed Intellipass w/DX-9100

Code No. LIT-1201829
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March 2006
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N2 and XT BUS Communication User Manual
Important Notice – Please Read
The product discussed in this literature is subject to terms and conditions outlined in
Johnson Controls selling policies. The sole source governing the rights and remedies of any
purchaser of this equipment is the relevant Johnson Controls selling policy.
NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE OR MERCHANTABILITY, OR WARRANTIES ARISING FROM COURSE
OF DEALING OR USAGE OF TRADE, ARE MADE REGARDING THE INFORMATION,
RECOMMENDATIONS AND DESCRIPTIONS CONTAINED HEREIN. In no event will Johnson
Controls or Eaton Electrical Inc. be responsible to the purchaser or user in contract, in tort
(including negligence), strict liability or otherwise for any special, indirect, incidental or
consequential damage or loss whatsoever, including but not limited to damage or loss of use of
equipment, plant or power system, cost of capital, loss of power, additional expenses in the use
of existing power facilities, or claims against the purchaser or user by its customers resulting
from the use of the information, recommendations and descriptions contained herein.
The information contained in this manual is subject to change without notice.
Cover Photo: Johnson Controls VSD Series Drives.

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Code No. LIT-1201829
March 2006
N2 and XT BUS Communication User Manual
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Table of Contents
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Definitions and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Hazardous High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
CHAPTER 1 — OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
CHAPTER 2 — BOARD LAYOUT AND CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . 2-1
VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
CHAPTER 3 — INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Making the Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Bus Terminal Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
LED Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Installing the VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
CHAPTER 4 — COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Fieldbus Board Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
RS-485 Communication Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
CHAPTER 5 — JOHNSON CONTROLS METASYS N2 PROTOCOL . . . . . . . . . . . . . . . 5-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
N2 Point Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
CHAPTER 6 — JOHNSON CONTROLS METASYS XT BUS PROTOCOL . . . . . . . . . . . 6-1
DX-9100 XT Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
XT Bus Point Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
CHAPTER 7 — COMMUNICATION BOARD FAULT TRACKING . . . . . . . . . . . . . . . . . . 7-1
APPENDIX A — PROCESS DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Process Data OUT (Slave ➔ Master). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Code No. LIT-1201829
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N2 and XT BUS Communication User Manual
List of Figures
Figure 2-1: Option Board VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . 2-1
Figure 3-1: Cable Stripping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Figure 3-2: Inserting the Data Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Figure 3-3: Grounding the Communication Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Figure 3-4: Stripping the Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Figure 3-5: Grounding the Communication Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Figure 3-6: Using Jumper X4 to Set the Bus Termination . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Figure 3-7: LED Indications on the Communication Board . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Figure 4-1: Communication Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Figure 6-1: Define VSD Analog Points by Selecting the 6AI,
2AO XT Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Figure 6-2: Assign User Names and the Hardware Address for
the XT Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Figure 6-3: Define VSD Digital Points by Selecting the 4DI,
4DO XT Expansion Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Figure 6-4: Assign User Names for the XT Expansion Module . . . . . . . . . . . . . . . . . . . . . 6-3
Figure 6-5: Define All of the VSD/XT Analog Inputs as “Active” . . . . . . . . . . . . . . . . . . . 6-4
Figure 6-6: Define the VSD/XT Active Analog Inputs as Noted in Table 6-1 . . . . . . . . . . . 6-4
Figure 6-7: Define the VSD/XT Digital Inputs as Noted in Table 6-3 . . . . . . . . . . . . . . . . . 6-5
Figure 6-8: Assign User Names and Define the VSD/XT Analog Outputs
as Noted in Table 6-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Figure 6-9: Define the VSD/XT Digital Outputs as ON/OFF Type . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-10: Assign User Names for the VSD/XT Digital Outputs
as Noted in Table 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-11: After Saving the File — Download the DX and XT from
the “Action” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
List of Tables
Table 1-1: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 2-1: VS-OPTNX Bus Connector Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Table 3-1: Communication Board Status LED (BS) — YELLOW . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-2: Fieldbus Status LED (FS) — GREEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-3: Installing the VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table 4-1: Changing the N2/XT Bus Board Commissioning Parameter Values . . . . . . . . 4-1
Table 4-2: Communication Message Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Table 5-1: Analog Inputs (AI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Table 5-2: Binary Inputs (BI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Table 5-3: Analog Outputs (AO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Table 5-4: Binary Outputs (BO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Table 5-5: Internal Integers (ADI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Table 6-1: Analog Inputs (AI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 6-2: Analog Outputs (AO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 6-3: Digital Inputs (DI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 6-4: Digital Outputs (DO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 7-1: Communication Board Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Table 7-2: VSD Response to Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Table A-1: Fieldbus Parameters — M1 ➔ G1.9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

iv
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Code No. LIT-1201829
March 2006
N2 and XT BUS Communication User Manual
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Safety
Definitions and Symbols
WARNING
This symbol indicates high voltage. It calls your attention to items
or operations that could be dangerous to you and other persons
operating this equipment. Read the message and follow the
instructions carefully.
This symbol is the “Safety Alert Symbol.” It occurs with either of
two signal words: CAUTION or WARNING, as described below.
WARNING
Indicates a potentially hazardous situation which, if not avoided,
can result in serious injury or death.
CAUTION
Indicates a potentially hazardous situation which, if not avoided,
can result in minor to moderate injury, or serious damage to the
product. The situation described in the CAUTION may, if not
avoided, lead to serious results. Important safety measures are
described in CAUTION (as well as WARNING).
Hazardous High Voltage
WARNING
Motor control equipment and electronic controllers are connected
to hazardous line voltages. When servicing drives and electronic
controllers, there may be exposed components with housings or
protrusions at or above line potential. Extreme care should be taken
to protect against shock.
Stand on an insulating pad and make it a habit to use only one
hand when checking components. Always work with another
person in case an emergency occurs. Disconnect power before
checking controllers or performing maintenance. Be sure
equipment is properly grounded. Wear safety glasses whenever
working on electronic controllers or rotating machinery.

Code No. LIT-1201829
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N2 and XT BUS Communication User Manual
Chapter 1 — Overview
Introduction
The Johnson Controls VSD Series Drives powered by Cutler-Hammer
®
technology from
Eaton’s electrical business can be controlled, monitored and programmed from a host
system via Johnson Controls N2 or XT BUS communication protocols with the addition of
the VS-OPTNX RS-485 Communication Option Board.
If you purchase your Communication Board separate from the drive, please note that it must
be installed in slot D or E on the control board of the VSD Series drive.
Specifications
Table 1-1: Specifications

The N2/XT Bus is a “daisy chain” communications line. It consists of three wires for the following signals: +, –, and Common. The
+ and – lines carry the actual data signals. The Common line provides a reference so that each connected device is capable of elec-
trically receiving and transmitting data by creating a common voltage reference among all the devices connected together over
the communication bus. Three conductors are required. It is important that the + and – lines are twisted together, which allows
most induced noise (common-mode noise) from external sources to affect both lines equally, thereby canceling the noise. In most
installations, the communication bus works fine with unshielded cable. However, in noisy environments, shielded twisted wire
must be used.
Item Specification
Communication Board Connections
Interface VS-OPTNX: Pluggable connector (5.08 mm)
Data Transfer Method RS-485, half-duplex
Communication Bus 3-wire (Twisted pair + Reference) shield optional

Electrical Isolation 500V DC
Communications
Johnson Controls N2 Bus As described in Metasys N2 System Protocol Specification
Johnson Controls XT Bus As described in Metasys System 9100 Protocol Specification
Baud Rate 9600 baud
Addresses 1 to 247
Environment
Ambient Operating Temperature 14 to 131°F (-10 to 55°C)
Storage Temperature -40 to 140°F (-40 to 60°C)
Humidity <95%, non-condensing
Altitude Max. 3280 ft. (1000m)
Vibration 0.5G at 9 to 200 Hz
Safety
Standards Fulfils EN 50178 standard
Certification CE, UL

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Code No. LIT-1201829
March 2006
N2 and XT BUS Communication User Manual
Powered by Eaton’s Cutler-Hammer Technology

Code No. LIT-1201829
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N2 and XT BUS Communication User Manual
Chapter 2 — Board Layout and Connections
The VS-OPTNX RS-485 Communication Board is connected to the communications bus
through a 5-pin pluggable bus connector.
Communication with the control board of the drive takes place through the standard Interface
Board Connector (see Figure 2-1 ).
VS-OPTNX Communication Board
Figure 2-1: Option Board VS-OPTNX Communication Board
Table 2-1: VS-OPTNX Bus Connector Signals

This pin (1) can be used to bypass the cable shield to the next slave.
X4 jumper is the 120 Ω termination resistor. Set X4 jumper to ON only if the
Johnson Controls N2 Protocol is selected and the drive is the last device on the
network. N/A for XT bus communication.
X1 jumper has no effect on VS-OPTNX board.
Signal Connector Description
SHLD

1

Shield
VP 2 Supply voltage – plus 5V (not used)
- 3 Receive/Transmit data – minus (N2-/RT-)
+ 4 Receive/Transmit data – plus (N2+/RT+)
COM 5 Bus Common (REF/COM)
1
2
3
4
5
Interface Board Connector
Jumpers
X1
X
Yellow = RS-485 Board Status
Green= Field Bus Status
4
Bus Connector
ON
OFF

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Code No. LIT-1201829
March 2006
N2 and XT BUS Communication User Manual
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