McQuay IM703-1 Installation Manual

Installation & Maintenance Manual

MicroTech II™
BACnet Communication Module – Ethernet/IP

ASHRAE 135, Annex J

•

10 BASE-T

IM703-1

: McQuay Controls

Group

: November 2001

Date

© 2001 McQuay International

Contents

Figures................................................................................................................................................... 2

Revision History.................................................................................................................................... 3

Reference Documents............................................................................................................................3

General Information ..............................................................................................................4

Description ............................................................................................................................................ 5

Application ............................................................................................................................................ 5

Component Data.................................................................................................................................... 6

Light Emitting Diodes (LEDs)...........................................................................................................6

Headers.............................................................................................................................................. 6

Installation.............................................................................................................................. 7

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

Installing a new MicroTech II BACnet Ethernet/IP Communications Module on the Main Control

Board ................................................................................................................................................. 7

Replacing a MicroTech II BACnet Ethernet/IP Communications Module on the Main Control

Board ................................................................................................................................................. 7

Integration ............................................................................................................................ 12

Network Connection............................................................................................................................ 12

BACnet/IP Addressing .................................................................................................................... 12

Configuring the Unit Controller ..........................................................................................................13

Service Information .............................................................................................................14

Test Procedures ................................................................................................................................... 14

Replaceable Parts List ......................................................................................................................... 14

Installation Kit................................................................................................................................. 14

Figures

Figure 1. BACnet Ethernet/IP Communications Module ......................................................................5

Figure 2. Building Automation System ................................................................................................. 5

Figure 3. MicroTech II BACnet Ethernet/IP Communications Module Major Components ................ 6

Figure 4. LonMark Communications Module Main Control Board ...................................................... 8

Figure 5. Mount BACnet Ethernet/IP Communications Module........................................................... 9

Figure 6. BACnet Ethernet/IP Connection Schematic Diagram............................................................ 9

Figure 7. Network Cable Routing for Applied Rooftop Units............................................................. 10

Figure 8. Network Cable Routing for Self-Contained Units................................................................ 11

2 IM703-1

Revision History

IM703-0 October 2, 2001 Preliminary release

IM703-1 November 12, 2001 Incorporated Self-Contained Units.

Reference Documents

Number Title

IM696 MicroTech II Applied Rooftop Unit Controller Installation Manual

OM137 MicroTech II Applied Rooftop Discharge Air Controller Operation Manual

OM138 MicroTech II Applied Rooftop Space Comfort Controller Operation Manual

ED15060 MicroTech II Protocol Information Data Applied Rooftop

IM710 MicroTech II Self-Contained Unit Controller Installation Manual

OM711 MicroTech II Self-Contained Discharge Air Controller Operation Manual

OM712 MicroTech II Self-Contained Space Comfort Controller Operation Manual

ED15061 MicroTech II Protocol Information Data Self-Contained

ANSI/ASHRAE
135-1995

BACnet A Data Communication Protocol for Building Automation and
Control Networks

Notice

Copyright © 2001 McQuay International, Minneapolis MN All rights reserved throughout the world.

McQuay International reserves the right to change any information contained herein without prior
notice. No guarantees are given as to the accuracy of information provided.

McQuay and MicroTech are registered trademarks of McQuay International. All other trademarks are the property of their respective
owners.

IM703-1 3

General Information

This manual contains the information you need to install this communications module, incorporate it
into the network, and maintain it.

WARNING

!

Electric shock hazard. Can cause personal injury or equipment damage.

This equipment must be properly grounded. Connections and service to the MicroTech II control
panel must be performed only by personnel that are knowledgeable in the operation of the
equipment being controlled.

CAUTION

!

Static sensitive components. Can cause equipment damage.

Discharge any static electrical charge by touching the bare metal inside the control panel before
performing any service work. Never unplug cables, circuit board terminal blocks, or power plugs
while power is applied to the panel.

NOTICE

This equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with this instruction manual, may cause interference to radio communications.
It has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his or her own expense.

any liability resulting from any interference or for the correction thereof.

McQuay International disclaims

4 IM703-1

Description

A MicroTech II BACnet Ethernet/IP Communications Module incorporates a MicroTech II unit
controller into an Ethernet Local Area Network (LAN). It is the interface to the network to Building
Automation Network using BACnet objects.

The MicroTech II BACnet Ethernet/IP Communications Module is a printed circuit board that plugs
onto the MicroTech II Main Control Board. Figure 1 shows an outline drawing of the BACnet
Ethernet/IP Communications Module.

Figure 1. BACnet Ethernet/IP Communications Module

4.00 in

2.60 in

Application

The MicroTech II BACnet Ethernet/IP Communications Module connects the MicroTech II unit
controller to the building automation system (BAS) on a Ethernet Local Area Network. It is the
interface adapter for the exchange of BACnet objects between the network and the unit controller.
Figure 2 shows the communications module and unit controller integrated into a BAS.

Figure 2. Building Automation System

Ethernet
10BASE-T

MicroTech II
Main Control
Board

MicroTech II BACnet
Ethernet I/P
Communications
Module

MicroTech II
Keypad

Network

IM703-1 5

Component Data

Figure 3 shows the major components of the communications module.

Figure 3. MicroTech II BACnet Ethernet/IP Communications Module Major Components

Light Emitting Diodes (LEDs)

The MicroTech II BACnet Ethernet/IP Communications Module has three LEDs to indicate
communication activity and status of the communication module.

LED Function

RX

TX

COL

• Lights when the communications module is receiving data

• Lights when the communications module is transmitting data

• Lights when there is a collision on the Ethernet network

Headers

The two headers on the component side of the communications module connect the unit controller to
the BACnet Ethernet/IP Communications Module through two sets of connector pins on the main
control board.

6 IM703-1

Installation

Mounting

The MicroTech II BACnet Ethernet/IP Communications Module can be installed in the field or it can
be installed in the factory. The module mounts on connector pins and is held in place with four plastic
locking standoffs. The Ethernet network cable connects to an RJ45 jack on the main control board.

Installing a new MicroTech II BACnet Ethernet/IP Communications Module on the Main Control Board

You can add a new MicroTech II BACnet Ethernet/IP Communications Module to the system in
order to incorporate it into an existing Ethernet network. The MicroTech II BACnet Ethernet/IP
Communications Module is included in a kit (Part number 090016701) along with this manual.

To install a new MicroTech II BACnet Ethernet/IP Communications Module on the MicroTech
II Main Control Board

1. Remove power from the Main Control Board.

2. Locate the two empty connectors and four standoffs for the MicroTech II BACnet Ethernet/IP
Communications Module on the Main Control Board. See Figure 4.

3. Orient the communications module so that the circuit side faces out (i.e., the component side faces
down). Align the communications module so that the connector pins on the Main Control Board
can penetrate the headers on the component side of the communications module. See Figure 5.

4. Push the MicroTech II BACnet Ethernet/IP Communications Module onto the connector pins and
standoffs until you hear the faint click of the locking standoffs securing the module in place.

5.

For an Applied Rooftop unit,

a. Route the network cable through an opening in the bottom of the cabinet, up the cable

raceway, across the shelf below the Main Control Board, and up to the Main Control Board.
See Figure 7.

b. Plug the network cable into the RJ45 jack on the Main Control Board.

6.

For a Self-Contained unit,

a. Route the network cable through an opening in the cabinet to the Main Control Board. See

Figure 8. Each corner post has knockouts for easy access.

b. Plug the network cable into the RJ45 jack on the Main Control Board.

7. Apply power to the Main Control Board.

Connect the communications module to the network. See Figure 6.

Connect the communications module to the network. See Figure 6.

Replacing a MicroTech II BACnet Ethernet/IP Communications Module on the Main Control Board

You can replace a MicroTech II BACnet Ethernet/IP Communications Module on the Main Control
Board.

To replace a MicroTech II BACnet Ethernet/IP Communications Module on the MicroTech II
Main Control Board

1. Remove power from the Main Control Board.

2. Locate the four standoffs for the communications module on the Main Control Board. See Figure

4.

3. Use a pliers or screwdriver to depress the barb on one standoff and gently pull the corner of the
communications module over the barb. Be careful to not bend the communications module or
misalign the connector pins.

4. Proceed to the other three corners, remove the communications module from each standoff, and
pull the module over the standoffs.

IM703-1 7

5. Gently lift the communications module from the Main Control Board.

6. Orient the replacement communications module so that the circuit side faces out (i.e., the
component side faces down). Align the communications module so that the connector pins on the
Main Control Board can penetrate the headers on the component side of the communications
module. See Figure 5.

7. Push the communications module onto the connector pins and standoffs until you hear the faint
click of the locking standoffs securing the module in place.

8. Connect the communications module to the network. See Figure 6.

a. Ensure that the network cable is plugged into the RJ45 jack on the Main Control Board.

9. Apply power to the Main Control Board.

Figure 4. LonMark Communications Module Main Control Board

Location for
LonWorks and
MSTP BACnet
Communications
Modules

LEDs

Locking Standoff

(4 places)

RJ45 Jack
BACnet Ethernet
Network Connector

8 IM703-1

Figure 5. Mount BACnet Ethernet/IP Communications Module

Figure 6. BACnet Ethernet/IP Connection Schematic Diagram

BACnet
Ethernet
Network

RJ45

Modular

Jack

Main

Control

Board

(MCB)

MicroTech II
BACnet Ethernet
Communications

Module

IM703-1 9

Figure 7. Network Cable Routing for Applied Rooftop Units

Main Control Board

BACnet
Ethernet
Comunications
Module

Cable Shelf

Network Cable

RJ45 Jack

BACnet Ethernet

Network Connection

Cable Raceway

Terminal Block TB2

Opening in
the floor

10 IM703-1

Figure 8. Network Cable Routing for Self-Contained Units

Note that the dotted cable path indicates
that you can route the network cable in the
most convient path for your application.

Controller

BACnet Ethernet
Coomunications
Module

RJ45 Jack for

Network Cable

Connection

Network Cable

IM703-1 11

Integration

Network Connection

Access to Properties

Object properties are accessible from the network by specifying the device object identifier, object
identifier, and the property identifier. To access a property, you must specify the object identifier
including the device object identifier or the object name including the device object name and the
property identifier.

BACnet/IP Addressing

The BACnet/IP (B/IP) address of the MicroTech II Applied Rooftop Unit Controller in a BACnet/IP
network consists of the four-octet IP address followed by the two-octet UDP (User Datagram
Protocol) port number. The BACnet/IP address is a six-octet value analogous to a MAC address. The
IP address portion of the BACnet/IP address must be unique in the BACnet/IP network segment. The
default UDP port number in the MicroTech II Unit Controller is 47808 (BAC0 in hexadecimal).

The device object of the MicroTech II Unit Controller contains an IP Subnet Mask (Default subnet
mask is 255.255.0.0) and a unique IP address. The controller does not support DHCP (Dynamic Host
Configuration Protocol) IP addressing.

The MicroTech II Unit Controller can be incorporated into an Ethernet network dedicated to BACnet
devices only or an Ethernet network shared with BACnet devices and other devices.

Dedicated BACnet Networks

For an Ethernet network dedicated to BACnet devices only, the default IP address and IP Subnet
Mask in the MicroTech II Unit Controller device object may be used. The default IP Address of the
controller is written in the device object and can be determined in one of two ways:

1. Construct the IP Address from the MAC Address of the controller (the MAC address is the 18­digit [six-octet] number on the label affixed to the Main Control Board):

IP Address Octet Method Range

1 (Most Significant) 172 (this value is fixed, it cannot be changed) 172

2 16 (this value is fixed, it cannot be changed) 16

3 Either

64 + Logical AND of the Fifth Octet of the MAC Address and 63

or

64 + (Fifth Octet of the MAC Address) Mod 64

4 (Least Significant) Sixth Octet of the MAC Address 0 - 255

64 - 127

12 IM703-1

The method you use to find the third octet requires further explanation. Either method gives the
same answer for this particular modulus (64).

The first method requires that you convert the Fifth Octet of the MAC Address to a binary
number and logically AND it bit-by-corresponding-bit with 63 (3F in hex or 00111111 in
binary) and then convert the result to a decimal value and add it to 64.

The second method adds 64 to the Fifth Octet of the MAC Address Modulus 64. The result
of the Modulus operation is the remainder only (ignore the quotient) of dividing the fifth
octet by 64. For example 20 mod 64 is 20 and 65 mod 64 is 1.

For example, for a MicroTech II Unit Controller with a MAC Address of 0.16.141.0.54.190,
the IP address would be 172.16.118.190.

• 54 = 110110; (110110 AND 111111 = 110110 =.54); 54 + 64 = 118

• 54 mod 64 = 54; 54 + 64 = 118

Note:

2. Read IP Address property from the device object using a service tool or another BACnet device.

To set the IP Address of other BACnet IP devices (workstations, routers, controllers) in the dedicated
BACnet Ethernet network select IP Addresses with the first two octets the same as the IP Address of
the controller (the default subnet mask is 255.255.0.0), and the third and fourth octets close to the
third and fourth octets of the MicroTech II Unit Controller IP Address. For example, assign the IP
Address of the workstation to 172.16.118.191 for the controller in the previous example. Use the
same IP Mask in the workstation as in the controller (255.255.0.0).

Shared BACnet Networks

Integrating the MicroTech II Unit Controller into a shared Ethernet LAN requires close cooperation
with the network administrator of the shared Ethernet network. First, obtain the IP Subnet Mask of the
shared network from the network administrator. Then, obtain static IP Addresses for all MicroTech II
Unit Controllers you are integrating into the shared network. Finally obtain the address of an IP
Router to use for sending IP messages to and from the BACnet IP subnets. Once you have these, write
them to the IP Address, IP Mask, and IP Router Address properties of the device object in the
MicroTech II Unit Controller.

The default BACnet/IP Network Address in the MicroTech II Unit Controller is 1001. The Network
Address must be unique for each BACnet network segment. All BACnet/IP devices on all Ethernet
segments must have the same BACnet/IP Network Address. This is the Network Address property of
the device object of the MicroTech II Unit Controller.

Finally, the Communication Option property of the MicroTech II Unit Controller device object must
be set to NONE for BACnet/IP communications to take place. NONE is the default value for this
property.

You can use the scientific version of the Windows calculator on you computer to
make either of these calculations.

Configuring the Unit Controller

The MicroTech II Main Control Board and BACnet Ethernet/IP Communications Module are
designed, programmed, and configured at the factory to be a MicroTech II Unit Controller. The unit
is ready to operate with the default values of the various parameters set at the factory. Default values
may be changed with the unit’s keypad or via the network. See the appropriate operation manual for
default values and keypad operating instructions and see the appropriate MicroTech II Protocol
Information Data for descriptions of the network variables. See Reference Documents for part
numbers.

IM703-1 13

Service Information

Test Procedures

If you can control the unit from its keypad, but you are not able to communicate with unit via the
network:

• Check the network wiring

• Check communications

 Use the standard TCP/IP suite of protocols to check your connectivity with other devices.

For example, type “ping <IP address of the MicroTech II BACnet Ethernet/IP
Communications Module>.” If you get a response from that IP address, you are connected to
the BACnet Ethernet/IP Communications Module.

 Use the Transmit LED to determine whether data is reaching the output connector; use the

Receive LED to determine whether any responses are being received.

If the MicroTech II BACnet Ethernet/IP Communications Module still does not respond, replace the
communications module with a new one.

Replaceable Parts List

Installation Kit

Component Description Part No.

Kit, Ethernet Installation Kit for BACnet Ethernet/IP Communications Module 0900167-01

14 IM703-1

IM703-1 15

13600 Industrial Park Boulevard, P.O. Box 1551, Minneapolis, MN 55440 USA [phone]