Eaton PM3 Manual

Contents

Description Page

1. Installation and Specifications ..............................................................................................................2

2. Indicators ..............................................................................................................................................9

3. Modbus RTU Communications ......................................................................................................... 10

4. Configuration and Input ...................................................................................................................... 11

5. Modbus Registers .............................................................................................................................. 12

Appendix A ......................................................................................................................................... 17

Effective March 2013

Instruction Leaﬂet IL012002EN

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

1. Installation and Speciﬁcations

CAUTION

DO NOT ATTEMPT TO INSTALL OR PERFORM MAINTENANCE ON

EQUIPMENT WHILE IT IS ENERGIZED. DEATH OR SEVERE PERSONAL

INJURY CAN RESULT FROM CONTACT WITH ENERGIZED EQUIPMENT.

ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT BEFORE PROCEEDING.

Figure 1. Attaching the Endcap.

Table 1. End Cap Kits.

Breaker Frame End Cap Kit Cat # End Cap Kit Style #

FD KPEKM1 6606C63G04

FD KPEK1 67B9101G03

JG FJ3RTWK 68C2837G09

JG FJ3RTDK 68C2837G07

KD KPEKM3 5102A14G02

KD KPEK3 5102A14G01

LG L3RTWK 66A4562G05

1. Attach endcap.

Figure 2. Inserting the Unit into the Breaker.

Figure 3. Locking the Unit in Place.

2. Insert unit into breaker.

Breaker must be in OFF or TRIPPED position for assembly.

3. Push down.

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

Figure 4. Inserting the Screws into the Retainers.

Figure 5. Torquing the Mounting Screws.

4. Insert screws in retainers.

Torque Chart for Connecting PM3 to Breaker

Breaker Frame Head Size Torque

FD Slotted screw 34-38 in-lb

4-4.4 N•m

JG Hex .236" 120-144 in-lb

14-16 N•m

KD Hex .236" 120-144 in-lb

14-16 N•m

LG Hex .315" 275 in-lb

31 N•m

5. Tighten mounting screws to provided torque specifications.

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

Table 2. FD, JG, KD, LG Terminal Information.

Frame Type Wire Type

Wire Size

Terminal

Materials Catalog Number

Torque

AWG mm2Lb.In. Nm

LG-Frame Cu/Al 500-750(1) 240-380(1) Aluminum TA631L*2 550 62

LG-Frame Cu/Al 2-500(2) 35-240(2) Aluminum TA632L*1*2 375 42

LG-Frame Cu/Al 2-500(1) 35-240(1) Aluminum TA350L 375 42

KD-Frame*3 Cu/Al 2-500(2) 35-240(2) Aluminum TA632L*1*2 375 42

KD-Frame*3 Cu/Al 2-500(1) 35-240(1) Aluminum TA350L 375 42

JG-Frame Cu/Al #4-350(1) 25-185 Aluminum TA250FJ 250 28.2

FD-Frame Cu/Al 4-40 25-95 Aluminum 3TA225FD 120 13.5

*1 Standard collars mounted on line and load end.

*2 Terminal Shield required.

*3 When using PM3 on KD breakers, LG terminals are required on load end of PM3.

CAUTION

TERMINAL SHIELDS MUST BE USED AS PER ORIGINAL CIRCUIT BREAKER

INSTALLATION INSTRUCTIONS.

Figure 6. Layout of LG 3 Pole with PM3.

12.135

308.23

2.740

69.60

5.480

139.19

8.438

214.33

13.823

351.10

10.125

257.18

5.577

141.66

4.733

120.22

1.719

43.66 .860

21.84

3.984

101.19

4.062

103.17

5.430

137.92

3.984

101.19

4.062

103.17

4.307

109.40

13.823

351.10

5.577

141.66

2.740

69.60

5.480

139.19

8.438

214.33

12.135

308.23

4.733

120.22

1.719

43.66

.860

21.84

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

Figure 7. Layout of KD 3 Pole with PM3.

Figure 8. Layout of JG with PM3.

4X .125-20 UNC

8.438

214.33

12.137

308.28

10.125

257.18

13.825

351.16

4.922

125.02

.860

21.84

1.719

43.66

5.766

146.46

3.813

96.85

4.062

103.17

4.313

109.55

3.984

101.19

4.89

124.21

5.490

139.45

2.745

69.72 4.062

103.17

2.745

69.72

5.490

139.45

5.766

146.46

13.823

351.10

4.922

125.02

.860

21.84

1.719

43.66

8.438

214.33

12.137

308.28

LOAD END

LINE

END

qHANDLE

LINE END

LOAD END

HANDLE

2X M5 x 0.8

3.952

100.38

11.983

304.37

1.375

34.93

17.48

.688

.781

19.84

3.171

80.54

5.500

139.70

10.500

266.70

2.063

52.40

4.125

104.78

HANDLE

3.568

90.63

3.438

87.33

3.342

87.17

3.952

100.38

3.344

84.94

3.422

86.92

4.409

111.99

1.375

34.93

17.48

.688

304.80

12.000

10.500

266.70

5.500

139.70 177.8

7.000

100.34

3.952

3.171

80.52

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

Figure 9. Layout of FD with PM3.

1.375

34.93

17.45

.687

2.875

73.03

4.500

114.30

9.531

242.09

3.625

92.08

6.000

152.40

11.000

279.40

3.501

88.93

3.385

85.98

3.188

80.98

3.625

92.08

3.625

92.08

11.000

279.40

3.344

84.94

3.422

86.92

3.945

100.20

4.125

104.78

1.375

34.93

.687

17.45

.750

19.05

2.875

73.03

4.500

114.30

9.531

242.09

2.063

52.40

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

Table 3. PM3 Power Monitoring and Communications Module

Specifications.

Current Input

Pick up current 0.3A rms

Max reported current

FD / JG 250A rms

KD / LD 630A rms

Accuracy 0.5% of reading

Voltage Inputs

Range

Line-to-neutral 30 - 366 Vac

Line-to-line 52 - 635 Vac

Supported Systems 3 element wye, 3 element wye + neutral

2 element delta, 4-wire delta systems

Input Impedance 996 kilo ohm/phase

Burden per phase 0.36 VA/phase max. at 600 V;

0.014 VA at 120 Volts"

Phase Voltage Connections Internal via screw terminal to busbar

Neutral Connection For wye system, a Neutral is required to be connected

to the PM3 on the right Phoenix connector.

If Neutral is not available, the meter will calculate

a virtual Neutral based on the phase to phase RMS

voltage. The system voltage must be balanced for this

to be accurate.

Frequency

Frequency 50 / 60 Hz

Accuracy ± 0.1 Hz

Resolution 0.1 Hz

Power and Energy

Accuracy 1% of reading (ANSI C12.1)

Isolation

All inputs and outputs are galvanically isolated to 2500 volts.

Environmental Ratings

Operating temperature -20º to +50°C (-4 to 122°F)

Storage temperature -20º to +50°C (-4 to 122°F)

Operating humidity To 95% RH non-condensing

Sensing Method

Voltage, current True RMS

Sampling Rate 13.02 K samples per second

Update Rate

Watts, Var and VA 1.03 sec at 60 Hz

All other parameters 1.07 second at 60 Hz

Power Supply

DC voltage 18 – 30 Vdc

Max Current 30.0 mA @ 24 Vdc

Burden 0.72 Watts

Standard Communication Format

Connection type 3 Wire RS-485

(A,B,Common)

Com port baud rate 9600 or 19,200 bauds Default: 19,200

Modbus address range 01 – 247

Data format Selectable (8,N,1 | 8,N,2

| 8,Even,1 | 8,Odd, 1) Default: 8,N,2

Protocols Modbus RTU

Internal Termination Resistor

selectable On or Off Via DIP switch Default: Enabled

Dimensions and Shipping

Weight (lbs) FD 1.26 (0.57 kg)

JG 1.6 (0.73 kg)

KD / LG 2.25 (1.02 kg)

Basic unit (in) FD 4.13 W X 5.00 L X 3.39 H

(104.90 x 127.00 x 86.11 mm)

JG 4.13 W X 5.00 L X 3.39 H

(104.90 x 127.00 x 86.11 mm)

KD / LG 5.48 W X 3.70 L X 4.062 H

(139.19 x 93.98 x 103.17 mm)

Shipping container

dimensions (in) FD/JG 8.0 X 5.13 x 5.5

(203.20 x 130.30 x 139.70 mm)

KD/LG 6.25 X 8.25 X 7.00

(158.75 x 209.55 x 177.80 mm)

Compliance

UL489, Annex J

IEC 61000-4-2 - ESD

IEC 61000-4-4 - EFT

IEC 61000-4-5 - SURGE

IEC 61000-4-6 - EMC

ANSI C12.1 (1% accuracy)

UL®/cUL®/CE

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

Figure 10. PM3 Breaker Status Wiring Diagram (KD/LG PM3).

Breaker Status:

Breaker status is brought to the unit through a 5-pin Phoenix

RA-series connector, part number 1844249. Figure 10 shows the pin

assignments for this connector.

CAUTION

FOR WYE SYSTEM, A NEUTRAL IS REQUIRED TO BE CONNECTED TO THE

PM3 ON THE RIGHT PHOENIX CONNECTOR. IF NEUTRAL IS NOT AVAIL-

ABLE, THE METER WILL CALCULATE A VIRTUAL NEUTRAL BASED ON THE

PHASE-TO-PHASE RMS VOLTAGE. THE SYSTEM MUST BE BALANCED FOR

THIS TO BE ACCURATE.

Combination

Auxiliary/alarm

Switch Kit

Red

Bell

Alarm

Black

Blue

Aux

Alarm

Black

Red

Bell

Alarm

No Connect

Neutral

Earth

Ground

+24

VDC DC Common

Com BA

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

2. Indicators

Figure 11. Status Indicators (KD/LG PM3).

2.1. Status Indicator

A single green LED is used to indicate the status of the

Measurement Board. The indicator has three states:

1. OFF

No light emission indicates internal DC power is not available, or the

Measurement Board has malfunctioned.

2. ON

Continuous light emission indicates power is applied, but the

Measurement Board is executing a power-on self test.

3. Slow Flash

Repetitive one second on, one second off indicates the

Measurement Board is operating normally.

Fast Flash

0.5 second on, 0.5 second off indicates one of three failures:

• Unit not calibrated;

• Unit has not been assembled properly; or

• Unit memory has been damaged.

Status

RX Led

TX Led

Com

DC Common

+24

VDC

Earth

Ground

Settings Network Address

Neutral

Red Bell Alarm

Common

Blue Aux Alarm

No Connect

2.2. Modbus Status Indicator

Modbus Rx Indicator

When illuminated, this green LED indicates the Communications

Board is receiving messages on the Modbus network.

ote:N This LED will typically be a solid green. That is, it will not flash as the

transmit LED does.

Modbus Tx Indicator

When illuminated, this green LED indicates the Communications

Board is transmitting a message on the Modbus network.

ote:N This LED typically flashes as the Communications Board transmits

messages over the Modbus network.

Instruction Leaﬂet IL012002EN

Effective March 2013

Instruction Leaﬂet for Modbus Power Monitoring/

Metering Module (PM3) for FD, JG, and KD/LG

Circuit Breakers and Motor Circuit Protectors

EATON CORPORATION www.eaton.com

3. Modbus RTU Communications

Modbus is a popular application-layer messaging protocol. The

protocol takes place at the data link layer of the Open Systems

Interconnection (OSI) model. Modbus serial line (Modbus RTU) is a

Master-Slave protocol. A Modbus transaction consists of two mes-

sages: a request from the master, and a reply from the slave.

The Modbus Add-on Module is a Modbus slave. The Modbus physi-

cal layer transmitter and receiver conforms to the RS485 standard.

A Modbus serial line message frame, or Protocol Data Unit, con-

tains:

• An Address Field;

• A Function Code;

• Data; and

• CRC.

Valid addresses are 1 – 247 decimal.

The function code indicates what kind of action to perform.

Examples are:

• 01 – Read Coils;

• 04 – Read Input Registers;

• 06 – Write Single Register;

Messages consist of 11-bit characters. Characters consist of:

• 1 Start Bit;

• 8 Data Bits (least significant bit first);

• 1 Parity Bit (even parity is the default; other modes may be sup-

ported); or

• 1 Stop Bit (2 stop bits if no parity is used).

The least significant bit is transmitted first (see Table 4).

• Modbus Slave, line terminator selectable by dip switch

• Baud rate (9600, 19.2k) selectable by dip switch

• Parity (even, odd, none) selectable by dip switches

3.1. Modbus RS485 Network

The following simplified rules apply to a given system consisting of

a cable link between master and slave devices. For more complex

configurations please refer to standard Modbus RTU wiring specifi-

cation rules for the RS485 network

The recommended Modbus cable has twisted-pair wires (24 AWG

stranded 7x32 conductors with PVC insulation) having an aluminum/

mylar foil shield with drain wire.

• The maximum system capacity is 4,000 feet of communications

cable and 247 devices on the Modbus RTU network.

• Make sure that there is twisted-pair wire that is recommended for

Modbus RTU network use. Use shielded twisted-pair wire to con-

nect each slave to the Modbus RTU network, daisy-chain style.

The polarity of the twisted pair is critically important.

3.2. Modbus Address Switches

Two rotary hexadecimal switches are used to set the Modbus Slave

Address for the unit. Valid addresses are from 0x01 to 0xF7 (1 to

247).

3.3. Exception Codes

Under certain circumstances, the PM3 will return an exception code.

If the function in the query is not supported by the PM3, exception

code 01 is returned in the response.

If the data (object) register is illegal, exception code 02 is returned in

the response.

If the data value in the query is illegal, exception code 03 is returned.

In certain circumstances, an exception code 05 (ACK) is returned.

If the PM3 cannot perform the requested function, exception code

07 (NAK) is returned.

If only a partial register is used in the query, exception code 84 is

returned.

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