Trane Tracer MP503 Owner's manual

Installation and
Operation
Tracer MP503
Input/Output Module
CNT-SVX09B-EN
April 2005

CNT-SVX09B-EN

CNT-SVX09B-EN
Tracer MP503 Input/Output Module Installation and Operation
This guide and the information in it are the property of American Standard Inc. and may not be used or reproduced in whole or in part,
without the written permission of American Standard Inc. Trane, a business of American Standard, Inc., has a policy of continuous
product and product data improvement and reserves the right to change design and specification without notice.
Although Trane has tested the hardware and software described in this guide, no guarantee is offered that the hardware and software
are error free.
Trane reserves the right to revise this publication at any time and to make changes to its content without obligation to notify any per-
son of such revision or change.
Trane may have patents or patent applications covering items in this publication. By providing this document, Trane does not imply
giving license to these patents.
The following are trademarks or registered trademarks of American Standard Inc.: Trane, Tracer, Rover.
The following are trademarks or registered trademarks of their respective companies or organizations: BACnet from
ASHRAE; Neuron, LonMark, LonTalk, and LonWorks from Echelon Corporation; National Electrical Code form the National
Fire Proctection Association, Inc.
Printed in the U.S.A.
© 2005 American Standard Inc. All rights reserved
™
™

CNT-SVX09B-EN
NOTICE:
Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully:
WARNING
Indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation, which, if not avoided, may result in minor or moderate injury.
It may also be used to alert against unsafe practices.
CAUTION
Indicates a situation that may result in equipment damage or property damage.
The following format and symbol conventions appear at appropriate sections throughout this manual:
IMPORTANT
Alerts installer, servicer, or operator to potential actions that could cause the product or system to
operate improperly but will not likely result in potential for damage.
◆This symbol precedes a procedure that consists of only a single step.
Note:
A note may be used to make the reader aware of useful information, to clarify a point, or to describe
options or alternatives.

CNT-SVX09B-EN i
Contents
Chapter 1 Overview and specifications . . . . . . . . . . . . . . . . . . 1
Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Storage environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Operating environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Agency listing/compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Additional components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Power transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Input devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Output devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2 General wiring information. . . . . . . . . . . . . . . . . . . 5
Input/output terminal wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
AC-power wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Communication-link wiring and addressing . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 3 Mounting the module . . . . . . . . . . . . . . . . . . . . . . . 9
Location recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operating environment requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 4 Applications of the Tracer MP503. . . . . . . . . . . . . 11
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Binary inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Thermistor inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
0–20 mA inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
0–10 Vdc inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wiring requirements and options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Contents
ii CNT-SVX09B-EN
Chapter 5 Network variable bindings . . . . . . . . . . . . . . . . . . 15
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Network variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Binding network variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Tracer MP503 bindings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Receiving data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Sending data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Examples of network variable bindings . . . . . . . . . . . . . . . . . . . . . . . . . 19
Example 1: Display sensor readings from a Tracer MP503
on a Tracer MP581 operator display . . . . . . . . . . . . . . . . . . . . . . . . 19
Example 2: Display sensor readings from a Tracer MP503
on two different Tracer MP581 operator displays . . . . . . . . . . . . . 21
Example 3: Control a binary output on the Tracer MP503
from a Tracer MP581 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Example 4: Use a sensor reading on a Tracer MP503
to control a pump VFD on a Tracer MP581 . . . . . . . . . . . . . . . . . . 23
Chapter 6 Status indicators for operation and
communication . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Tracer MP503 circuit board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Service Pin button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Interpreting LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Service LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LonTalk LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Binary output LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter 7 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Initial troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Binary output (relay output) troubleshooting. . . . . . . . . . . . . . . . . . . . . 33
Universal input troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

CNT-SVX09B-EN 1
Chapter 1
Overview and specifications
This guide provides installation and configuration information for the
Tracer MP503 input/output (I/O) module, as well as a description of its
operations. The overview includes a product description, specifications,
and descriptions of additional components needed in some Tracer MP503
applications.
Product description
The Tracer MP503 I/O module is a field-installed device used to monitor
inputs and control binary outputs. The module has four universal inputs
that can be configured as binary, thermistor, 0–20 mA, or 0–10 Vdc, as
well as four binary outputs.
Storage environment
If a Tracer MP503 I/O module is to be stored for a substantial amount of
time, store it in an indoor environment that meets the following
requirements:
•Temperature: –40° to 185°F (–40° to 85°C)
•Relative humidity: 5–95%, noncondensing
Operating environment
Operate a Tracer MP503 I/O module in an environment that meets the
following requirements:
•Temperature: –40°F to 158°F (–40°C to 70°C)
•Relative humidity: 5–95%, non-condensing
Dimensions
Plastic-cover model dimensions
For complete dimensional drawing, see .
•Height: 5.375 in. (137 mm)
•Width: 6.875 in. (175 mm)
•Depth: 2 in. (51 mm)

Chapter 1 Overview and specifications
2CNT-SVX09B-EN
Metal-cover model dimensions
For complete dimensional drawing, see .
•Height: 9.0 in (25 mm)
•Width: 10.37in. (263 mm)
•Depth: 2.25 in. (58 mm)
Clearances
For wiring, ventilation, and maintenance, provide thefollowing minimum
clearances for the module, :
Plastic-cover model
(see Figure 1 on page 3)
•Front: 4.0 in. (102 mm)
•Each side: 1.0 in. (25 mm)
•Top and bottom: 4.0 in. (102 mm)
Metal-cover model
(see Figure 2 on page 3)
•Front: 24.0 in. (610 mm)
•Each side: 2.0 in. (51 mm)
•Top and bottom: 1.0 in. (25 mm)
Power
The transformer must meet the following minimum requirements for the
controller and its output devices:
•19–30 Vac (24 Vac nominal)
•50/60 Hz
•9 VA and 12 VA maximum per binary output utilized
Operating environment
Operate a Tracer ZN517 unitary controller in an indoor environment that
meets the following requirements:
• Temperature: From –40°F to 160°F (–40°C to 70°C)
• Relative humidity: From 5–90%, noncondensing

Operating environment
CNT-SVX09B-EN 3
Figure 1. MP503 plastic-cover model dimensions and clearances
Figure 2. MP503 metal-cover model dimensions and clearances
4 in.
(102 mm)
1 in.
(25 mm)
5.625 in.
(143 mm)
5.375 in. (137 mm)
1 in.
(25 mm)
6.31 in.
(160 mm)
4 in.
(102 mm)
4 in.
(102 mm)
2 in. (51 mm)
6.875 in.
(175 mm)
Clearances
Dimensions
1 in.
(25 mm)
9 in.
(229 mm)
2 in.
(51 mm)
24 in.
(610 mm)
10.37 in.
(263 mm)
width with cover
1 in.
(25 mm)
2.25 in.
(58 mm)
Clearances
Dimensions
2 in.
(51 mm)
0.28 in.
(7 mm)
9 in.
(229 mm)
6.5 in.
(165 mm)
1.875 in.
(48 mm)
7 in.
(178 mm)
1 in.
(25 mm)
10.25 in.
(260 mm)
width without cover

Chapter 1 Overview and specifications
4CNT-SVX09B-EN
Storage environment
If you are storing a Tracer ZN517 unitary controller for a substantial
amount of time, store it in an indoor environment that meets the
following requirements:
• Temperature: From –40° to 185°F (–40° to 85°C)
• Relative humidity: From 5–95%, noncondensing
Agency listing/compliance
CE—Immunity:
EMC Directive 89/336/EEC
EN 50090-2-2:1996
EN 50082-1:1997
EN 50082-2:1995
EN 61326-1:1997
CE—Emissions:
EN 50090-2-2:1996 (CISPR 22) Class B
EN 50081-1:1992 (CISPR 22) Class B
EN 55022:1998 (CISPR 22) Class B
EN 61326-1:1997 (CISPR 11) Class B
UL and C-UL listed:
Energy Management Equipment—PAZX (UL 916)
UL 94-5V (UL flammability rating for plenum use)
FCC Part 15, Subpart B, Class B

CNT-SVX09B-EN 5
Chapter 2
General wiring information
This chapter provides specifications and general information about wir-
ing the Tracer MP503 I/O module. The module requires wiring for:
•Input/output terminals
•AC power to the module
•Communication-link wiring, if the module is to communicate with a
building automation system (BAS) or other LonTalk devices
Input/output terminal wiring
All input/output terminal wiring for the Tracer MP503 I/O module must
meet the following requirements:
•All wiring must comply with the National Electrical Code and local
codes.
•Use only 18 AWG twisted-pair wire with stranded, tinned-copper con-
ductors. (Shielded wire is recommended.)
•Binary output wiring must not exceed 1000 ft (300 m).
•Binary input and 4–20 mA input wiring must not exceed 1000 ft
(300 m).
•Thermistor input and 0–10 Vdc input wiring must not exceed 300 ft
(100 m).
•Do not run input/output wires in the same wire bundle with any ac-
power wires.
For detailed wiring information and diagrams, see Chapter 4, “Applica-
tions of the Tracer MP503.”

Chapter 2 General wiring information
6CNT-SVX09B-EN
AC-power wiring
WARNING
HAZARDOUS VOLTAGE!
Disconnect all electric power including remote disconnects before ser-
vicing. Follow proper lockout/tagout procedures to insure the power
can not be inadvertently energized during installation or servicing. Fail-
ure to disconnect power could result in death or serious injury.
WARNING
Hazardous voltage!
Make sure that the 24 Vac transformer is properly grounded. Failure to
do so could result in death or serious injury and/or damage to equip-
ment.
CAUTION
Complete input/output wiring before applying power to the Tracer
MP503 I/O module. Failure to do so may cause damage to the device or
power transformer due to inadvertent connections to power circuits.
CAUTION
To prevent device damage, do not share 24 Vac between devices.
The recommended wire for ac power is 16 AWG (1.3 mm2)copper wire. All
wiring must comply with National Electrical Code and local codes.
The ac-power connections are in the top left corner of the Tracer MP503 I/
O module (see Figure 3 on page 7).

AC-power wiring
CNT-SVX09B-EN 7
Figure 3. Connecting ac-power wires to the module
Use a UL-listed Class 2 power transformer supplying a nominal 24 Vac
(20–30 Vac). The transformer must be sized to provide adequate power to
the Tracer MP503 I/O module (10 VA) and output devices, including
relays, to a maximum of 12 VA per output utilized. The Tracer MP503
may be powered by an existing transformer integral to the controlled
equipment, provided the transformer has adequate power available and
proper grounding is observed.
H
N
24 Vac
transformer
Line
voltage

Chapter 2 General wiring information
8CNT-SVX09B-EN
Communication-link wiring and
addressing
The Tracer MP503 I/O module communicates with the BAS and with
other devices through a LonTalk communication link.
IMPORTANT
For important instructions on network wiring, refer to the Tracer Sum-
mit Hardware and Software Installation guide (BMTX-SVN01A-EN).
Wiring for the communication link must meet the following require-
ments:
•All wiring must comply with the National Electrical Code and local
codes.
•22 AWG Level 4 unshielded communications wire recommended for
most Comm5 installations.
•Termination resistors are required for wiring LonTalk devices com-
municating on a network. For important instructions on using termi-
nation resistors for LonTalk applications, refer to the Tracer Summit
Hardware and Software Installation guide (BMTX-SVN01A-EN).
Each Tracer MP503 I/O module has a unique 12-character alphanumeric
device address for communicating on a BAS network. This address,
referred to as a Neuron ID, is assigned in the factory before the product is
shipped. Each device can be identified by viewing its unique Neuron ID,
which is on a printed label attached to the circuit board of the device.
Additional adhesive-backed, peel-off Neuron ID labels are tethered to the
device for placing on mechanical prints or unit location worksheets. The
Neuron ID will appear when communication is established with a service
tool (such as the Rover service tool) or a BAS. An example Neuron ID is
00-01-64-1C-2B-00.

CNT-SVX09B-EN 9
Chapter 3
Mounting the module
This chapter gives recommendations and requirements for mounting the
Tracer MP503 I/O module.
Location recommendations
Trane recommends locating the Tracer MP503 I/O module:
•Near the controlled equipment to reduce wiring costs
•Where it is easily accessible for service personnel
•Where public access is restricted to minimize the possibility of tam-
pering or vandalism
Operating environment requirements
Operate a Tracer MP503 I/O module in an environment that meets the
following requirements:
•Temperature: –40°F to 158°F (–40°C to 70°C)
•Relative humidity: 5–95%, non-condensing

Chapter 3 Mounting the module
10 CNT-SVX09B-EN
Mounting recommendations
IMPORTANT
Leave the cover on when mounting the Tracer MP503 I/O module to
avoid the possibility of damaging the circuit board during installation.
Mounting recommendations are as follows:
•Mount the module in any direction, other than with the front of the
cover facing downward.
•Mount using the two 3/16 in. (4.8 mm) radius mounting holes provided
(see Figure 4). Mounting fasteners are not included.
•Attach the module securely so it can withstand vibrations of associ-
ated heating, ventilating, and air-conditioning (HVAC) equipment.
•If the module is mounted in a small enclosed compartment, complete
all wiring connections before securing the module in the compart-
ment.
Figure 4. Mounting the Tracer MP503 I/O module

CNT-SVX09B-EN 11
Chapter 4
Applications of the Tracer
MP503
This chapter provides information about the function of inputs and out-
puts and examples of wiring for Tracer MP503 applications. The Tracer
MP503 I/O module is a field-installed device. It is used to monitor inputs
and control binary outputs. The module has four configurable inputs and
four binary outputs.
Inputs
The Tracer MP503 has four inputs. Each input can be configured to be
binary, thermistor, 0–20 mA, or 0–10 Vdc. You may have any mixture of
these input types connected to the module. The factory-default input type
is thermistor. To change the configuration of the input, use the device
plug-in and a service tool, such as the Rover service tool. No jumpers need
to be set on the circuit board.
Binary inputs
When an input is configured as binary, the Tracer MP503 equates a sig-
nal of 0 Vac with open contacts and 24 Vac with closed contacts.
Thermistor inputs
Thermistor inputs are used to measure temperature. They must be Trane
10kΩ(at 25oC) thermistors. Any Trane zone temperature sensor can be
connected to the Tracer MP503; however, the module will not recognize
the setpoint thumbwheel or fan speed switch that appears on some sen-
sors.

Chapter 4 Applications of the Tracer MP503
12 CNT-SVX09B-EN
0–20 mA inputs
Many common sensors, such as humidity, pressure, and flow sensors, pro-
vide a 4–20 mA output. You can install any of these sensors, connect it to
an input on the Tracer MP503, and configure that input for 0–20 mA.
IMPORTANT
Because most sensors have 4–20 mA outputs rather than 0–20 mA out-
puts, some scaling is required. The scaling cannot be done at the Tracer
MP503. The Tracer MP503 transmits the raw mA reading.
To power these sensors, 24 Vdc is available from the Tracer MP503 circuit
board. See Figure 5 on page 13 for wiring details.
0–10 Vdc inputs
The Tracer MP503 can read a value from a sensor that provides a 0–
10 Vdc signal.
IMPORTANT
If you are using a sensor with a smaller range (such as 2–10 Vdc or 6–
9 Vdc), some scaling is required. The scaling cannot be done at the
Tracer MP503. The Tracer MP503 transmits the raw voltage reading.
To power these sensors, 24 Vdc is available from the Tracer MP503 circuit
board. See Figure 5 on page 13 for wiring details.
Outputs
The binary outputs are form A (SPST) relay outputs. These relays switch
24 Vac; they are not dry contacts. A pilot relay is required for any applica-
tion requiring dry contacts. Relays connected to the binary outputs on the
module cannot exceed 12 VA or 0.5 A current draw at 24 Vac.

Wiring requirements and options
CNT-SVX09B-EN 13
Wiring requirements and options
Figure 5 shows the wiring of each type of input on the Tracer MP503 I/O
module. The figure also shows the wiring for a typical binary output.
Figure 5. Input/output terminal wiring for the Tracer MP503 I/O module
H
Typical relay on/off
Not
used
In LonTalk
communication
link
Out
24 Vac
N
Typical relay on/off
Typical relay on/off
Typical relay on/off
–
+
–
+GND
Typical
thermistor
sensor
Typical2-wire
4–20 mA
sensor
Typical 3-wire
0–10 Vdc sensor
Typical
binary
switching
device

Chapter 4 Applications of the Tracer MP503
14 CNT-SVX09B-EN