Tracer ™ Controls

Tracer MP.501 Controller

June 2001 firealarmresources.com

BAS-PRC008-EN

®

Introduction

The Tracer MP.501 controller is a configurable, multi-purpose controller used to provide direct-digital control for heating, ventilation, and air conditioning

(HVAC) equipment.

The controller can operate as a standalone device or as part of a building automation system (BAS).

Communication between the controller and a BAS occurs via a LonTalk Comm5 communication link.

The Tracer MP.501 provides a single control loop with the following output types: 2-stage, tri-state modulating, and

0–10 Vdc analog. The controller can be configured in two possible modes:

Space Comfort Controller (SCC) or generic.

In SCC mode, the Tracer MP.501

conforms to the LonMark SCC profile and controls space temperature to an active setpoint.

SCC mode supports the following applications:

• Heating control loop

• Cooling control loop

• Two-pipe heat/cool automatic changeover using a communicated water loop temperature

In generic mode, the Tracer MP.501

provides control flexibility in a variety of applications that do not necessarily follow a LonMark profile. The control loop accepts inputs of the following types: temperature, pressure, flow, percent, or parts per million (ppm).

Generic mode supports many applications including:

• Fan speed control based on duct static pressure

• Pump speed control based on water differential pressure or flow

• Humidifier control based on space or duct relative humidity

™ ® The following are trademarks or registered trademarks of their respective companies: LonTalk and LonMark from Echelon Corporation; Rover, Tracer, and Tracer

Summit from Trane.

BAS-PRC008-EN firealarmresources.com

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Inputs and outputs . . . . . . . . . . . . . . . . . . . . 4

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Network architecture . . . . . . . . . . . . . . . . . . 7

Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . 9

Specifications . . . . . . . . . . . . . . . . . . . . . . . 11

®

BAS-PRC008-EN firealarmresources.com

3

®

Inputs and outputs

Tracer MP.501 inputs and outputs include:

• Analog inputs:

SCC mode: zone temperature, zone temperature setpoint

Generic mode: 4–20 mA input

• Binary inputs:

SCC mode: occupancy

Generic mode: enable/disable

• Outputs: 2-stage, tri-state modulation, or 0–10 Vdc analog

SCC mode: fan on/off

Generic mode: interlock device on/off

(follows the enable/disable binary input)

• Generic point for use with a Tracer

Summit building automation system: binary input (shared with occupancy/ enable)

Generic inputs pass information to the building automation system. They do not directly affect the operation of the Tracer

MP.501 outputs.

4 firealarmresources.com

BAS-PRC008-EN

Features

Easy installation

The Tracer MP.501 is suitable for indoor mounting in a variety of locations.

Clearly labeled screw terminals ensure that wires are connected quickly and accurately. A compact enclosure design simplifies installation in minimal space.

Flexible control

Using a single proportional, integral, and derivative (PID) control loop, the Tracer

MP.501 controller controls an output based on a measured input value and a specified setpoint. The output can be configured as a 2-stage, a tri-state modulating, or a 0–10 Vdc analog signal to control to the active setpoint.

Adjustable PID loop

The Tracer MP.501 provides a single control loop with adjustable PID control parameters, which allows control to be customized for a variety of applications.

Interoperability

In SCC mode, the Tracer MP.501

conforms to the LonMark SCC profile. In generic mode, the controller does not conform to a specific LonMark profile, but supports standard network variable types (SNVTs). Both modes communicate via the LonTalk protocol.

This allows the Tracer MP.501 to be used with a Trane Tracer Summit system as well as other building automation systems that support LonTalk.

Occupied and unoccupied operation

Available in SCC mode only, the occupancy input works with a motion

(occupancy) sensor or a time clock. A communicated value from a building automation system can also be used.

The input allows the controller to use unoccupied (setback) temperature setpoints.

Control interlock

Available in generic mode only, the interlock input works with a time clock or other binary switching device to enable or disable the controller process. When disabled, the control output is driven to a configurable (0–100%) default condition.

Continuous or cycling fan operation

Available in SCC mode only, the fan can be configured to run continuously or cycle on and off automatically during occupied operation. The fan will always cycle in unoccupied mode.

Timed override

Available in SCC mode only, the timed override function for after-hours operation allows users to request unit operation by the touch of a button on the zone temperature sensor. The override timer is configurable with a range of

0–240 minutes. Additionally, users can press the Cancel button at any time to place the unit back into unoccupied mode.

Manual output test

Pressing the Test button on the controller exercises all of the outputs in sequence. This feature is an invaluable troubleshooting tool that does not require a PC-based service tool.

Peer-to-peer communication

The Tracer MP.501 can share data with other LonTalk-based controllers. Several controllers can be bound as peers to share data such as setpoint, zone temperature, and heating/cooling mode.

Space temperature control applications having more than one unit serving a single large space can benefit from this feature, which prevents multiple units from simultaneously heating and cooling.

®

5 BAS-PRC008-EN firealarmresources.com

®

Figure 1: Tracer MP.501 dimensions

6

5

/

16 in.

(161 mm)

Dimensions

The Tracer MP.501 dimensions are shown in Figure 1.

GND 24V

AC POWER

24V 1 24V 2 24V

BINARY OUTPUTS

3 OUT GND

AO

STATUS

LED

5

3

/

8 in.

(137 mm)

PIN

A

COMM5

B A B BI

BI

1

AI ZONE SENSOR

GND +20 AI1 SET GND ZN COMM5

LED

5

5

/

8 in.

(143 mm)

6

7

/

8 in.

(175 mm)

2 in.

(51 mm)

6 firealarmresources.com

BAS-PRC008-EN

Network architecture

The Tracer MP.501 can operate on a

Tracer Summit building automation system (see Figure 2), on a peer-to-peer network (see Figure 3), or as a standalone device.

The Tracer MP.501 can be configured using the Rover service tool for Tracer

Figure 2: Tracer MP.501 controllers as part of a building automation system controllers or any other PC-based service tool compliant with the

EIA/CEA-860 standard. This tool can be connected to a communication jack on a zone temperature sensor or at any accessible location on the LonTalk

Comm5 communication link.

Tracer Summit

PC Workstation

®

LAN (Ethernet or ARCNET)

Building control unit

(BCU)

TRACER SUMMIT

ALM PWR

LonTalk

Comm5 link

Zone temperature sensor

75

70

80

85

ON

Cancel

Perimeter fin tube radiation

MP.501

®

Additional

LonTalk devices

BCU

TRACER SUMMIT

ALM PWR

Fan controlling building pressurization

MP.501

®

Additional

LonTalk devices

H L

Building static pressure sensor

PC-based service tool

Fin tube with control valve

VFD

Exhaust fan with variable frequency drive (VFD)

BAS-PRC008-EN 7 firealarmresources.com

®

Figure 3: Tracer MP.501 controllers on a peer-to-peer network

75

70

80

85

ON

Cancel

One zone temperature sensor for multiple MP.501 controllers

MP.501

®

MP.501

®

Multiple fan coils serving a large space

Additional

LonTalk devices

Fan coil

8 firealarmresources.com

BAS-PRC008-EN

Wiring diagrams

Figure 4 shows a general wiring diagram for the Tracer MP.501 controller in SCC mode.

Figure 4: Tracer MP.501 controller wiring diagram (SCC mode)

1st stage or drive open*

2nd stage or drive closed*

Fan (on/off)

H

24 Vac

N

Analog output (0–10 Vdc)*

GND 24V 24V

AC POWER

1 24V 2 24V

BINARY OUTPUTS

3 OUT GND

AO

STATUS

LED

®

SERVICE

LED PIN

A

COMM5

B A B

BI

BI 1

AI ZONE SENSOR

GND +20 AI1 SET GND ZN

COMM5

LED

BAS-PRC008-EN

Not used

Comm5 communication link

In

Out

* Only one type of output can be used at one time (2-stage, tri-state modulation, or analog)

Occupancy or generic input

Comm5

1

2

3

4

5 firealarmresources.com

70

65

75

80

85

*

55

50 Trane zone temperature sensor

ON

Cancel

9

®

Figure 5 shows a general wiring diagram for the Tracer MP.501 controller in generic mode.

Figure 5: Tracer MP.501 controller wiring diagram (generic mode)

2nd stage or drive closed*

1st stage or drive open* Interlock device (on/off)

H

24 Vac

N

Analog output (0–10 Vdc)*

GND 24V 24V

AC POWER

1 24V 2 24V

BINARY OUTPUTS

3 OUT GND

AO

STATUS

LED

SERVICE

LED PIN

A

COMM5

B A B

BI

BI 1

AI ZONE SENSOR

GND +20 AI1 SET GND ZN

COMM5

LED

10

Not used

Comm5 communication

In link

Out

Enable/disable or generic input

* Only one type of output can be used at one time (2-stage, tri-state modulation, or analog)

}

Analog input

(4–20 mA) firealarmresources.com

BAS-PRC008-EN

Specifications

Power

Supply: 21–27 Vac (24 Vac nominal) at

50/60 Hz

Consumption: 10 VA (70 VA at maximum utilization)

Dimensions

6

7

/

8 in. L × 5

3

/

8 in. W × 2 in. H

(175 mm × 137 mm × 51 mm)

Operating environment

Temperature: 32 to 122°F (0 to 50°C)

Relative humidity: 10–90% noncondensing

Storage environment

Temperature: -4 to 160°F (-20 to 70°C)

Relative humidity: 10–90% noncondensing

Agency listings/compliance

CE—Immunity:

EN 50082-1:1997

CE—Emissions:

EN 50081-1:1992 (CISPR 11) Class B

EN 61000-3-2, EN 61000-3-3

UL and C-UL listed:

Energy management system

UL 94-5V (UL flammability rating for plenum use)

FCC Part 15, Class A

®

BAS-PRC008-EN firealarmresources.com

11

Literature Order Number BAS-PRC008-EN

File Number

Supersedes

Stocking Location

PL-ES-BAS-000-PRC008-0601

New

La Crosse

The Trane Company

An American Standard Company www.trane.com

For more information contact your local district office or e-mail us at [email protected]

Since The Trane Company has a policy of continuous product and product data improvement, it reserves the right to change design and specifications without notice.

firealarmresources.com