Eaton IQ 250 Guide

IQ 250/260
Low-Cost High Performance
Multifunction Electricity Meter
User & Installation Manual
IB02601006E Rev. 1.0 www.eaton.com

IQ 250/260 Meter
www.eaton.com IB02601006E TOC- 1
Table of Contents
1 INTRODUCTION 1-1
About this Manual 1-1
Warranty and Liability Information 1-1
Safety Precautions 1-2
2 IQ 250/260 Overview and Specifications 2-1
IQ 250/260 Overview 2-1
Voltage and Current Inputs 2-2
Ordering Information 2-3
Measured Values 2-4
Utility Peak Demand 2-5
Specifications 2-5
Compliance 2-8
Accuracy 2-8
3 Mechanical Installation 3-1
Introduction 3-1
ANSI Installation Steps 3-3
DIN Installation Steps 3-4
IQ 250/260T Transducer Installation 3-5
4 Electrical Installation 4-1
Considerations When Installing Meters 4-1
CT Leads Terminated to Meter 4-2
CT Leads Pass Through (No Meter Termination) 4-3
Quick Connect Crimp-on Terminations 4-4
Voltage and Power Supply Connections 4-5
Ground Connections 4-5
Voltage Fuses 4-5
Electrical Connection Diagrams 4-6
5 Communication Installation 5-1
IQ 250/260 Communication 5-1
RS-485 / KYZ Output (Com 2) 5-1
Using the Power Xpert® Gateway 5-4
IQ 250/260T Communication Information 5-5

TOC-2 IB02601006E www.eaton.com
IQ 250/260 Meter
6 Using the IQ 250/260 6-1
Introduction 6-1
Understanding Meter Face Elements 6-1
Understanding Meter Face Buttons 6-1
Using the Front Panel 6-2
Understanding Startup and Default Displays 6-2
Using the Main Menu 6-3
Using Reset Mode 6-3
Entering a Passwords 6-4
Using Configuration Mode 6-5
Configuring the Scroll Feature 6-6
Configuring CT Setting 6-7
Configuring PT Setting 6-8
Configuring Connection Setting 6-9
Configuring Communication Port Setting 6-9
Using Operating Mode 6-10
Understanding the % of Load Bar 6-11
Performing Watt-Hour Accuracy Testing (Verification) 6-12
7 Using the IQ 250/260 I/O Option Cards 7-1
Overview 7-1
Installing Option Cards 7-2
Configuring Option Cards 7-2
Digital Output (Relay Contact)/Digital Input Card 7-3
Specifications 7-3
Wiring Diagram 7-4
Pulse Output (Solid State Relay Contacts)/Digital Input Card 7-5
Specifications 7-5
Default Configuration 7-5
Wiring Diagram 7-6
1mA Output Card 7-7
Specifications 7-7
Default Configuration 7-7
Wiring Diagram 7-8
20mA Output Card 7-9
Specifications 7-9
Default Configuration 7-9
Wiring Diagram 7-10

IQ 250/260 Meter
www.eaton.com IB02601006E TOC- 3
8 Programming the IQ 250/260 8-1
Overview 8-1
Connecting to the IQ 250/260 8-1
Accessing the IQ 250/260 Device Profile 8-2
Selecting Settings 8-2
Performing Tasks 8-3
Configuring Settings 8-6
Configuring CT, PT Ratios and System Hookup 8-6
Configuring Time Settings 8-7
Configuring System Settings 8-7
Configuring Communications Settings 8-8
Setting Display Configuration 8-9
Configuring Energy, Power Scaling, and Averaging 8-10
Configuring Limits (IQ 260 only) 8-12
Configuring I/O Option Cards 8-14
Configuring a Relay Output/Digital Input Card 8-15
Configuring a Pulse Output/Digital Input Card 8-17
Configuring a 0-1mA Output Card 8-19
Configuring a 4-20mA Output Card 8-20
Polling the IQ 250/260 Meter 8-21
Instantaneous Polling 8-22
Poll Max and Min Readings 8-23
Poll Power and Energy 8-24
Poll Accumulators 8-24
Poll Phasors 8-25
Poll Status Inputs 8-26
Poll Limits (IQ 260 only) 8-27
Using the IQ 250/260 Tools Menu 8-28
Accessing the Device Profile Screen 8-28
Setting Device Time 8-28
Retrieving Device Time 8-28
Resetting Device Information 8-29
Retrieving Device Status 8-29
Viewing Option Card Information 8-29
Performing Manual Relay Control 8-30
Performing Firmware Flash Update 8-30
Performing Additional Tasks with IQ 250/260 Configuration Software 8-31
Using Connection Manager 8-31
Disconnecting from an IQ 250/260 8-33
Changing the Primary Device/Address 8-33
Merging Connection Databases 8-33
Using the Options Screen 8-34
Using the Help Menu 8-34

TOC-4 IB02601006E www.eaton.com
IQ 250/260 Meter
Appendix A - IQ 250/260 Navigation Maps A-1
Introduction A-1
Navigation Maps A-1
Appendix B - Modbus Mapping for IQ 250/260 B-1
Introduction B-1
Modbus Register Map Sections B-1
Data Formats B-1
Floating Point Values B-2
Modbus Register Map (MM-1 to MM-8) B-3
Appendix C - Using DNP Mapping for IQ 250/260 C-1
Overview C-1
Physical Layer C-1
Data Link Layer C-1
Application Layer C-2
Error Reply C-2
DNP Lite Register Map C-3
DNP Message Layouts C-5

Chapter 1:
IQ 250/260 Meter Introduction
www.eaton.com IB02601006E 1- 1
1 Introduction
About This Manual
This document is the user manual for the installation, operation, and maintenance of the Eaton
IQ 250/260 Meter. It is intended for authorized and qualified personnel who use the IQ 250/260
Meter. Please refer to the specific WARNINGS and CAUTIONS in this section before proceeding.
For Technical Support and after hour emergencies, contact our Power Quality Technical Support
team at 1-800-809-2772, option 4 / sub-option 1 or by email at [e-mail].
For those outside the United States and Canada, call 414-449-7100 option 4 / sub-option 1. You
can also visit us on the web at http://www.eaton.com and follow the Products link.
Warranty and Liability Information
NO WARRANTIES EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF FITNESS FOR
A PARTICULAR PURPOSE OF MERCHANTABILITY, OR WARRANTIES ARISING FROM
COURSE OR DEALING OR USAGE OF TRADE ARE MADE REGARDING THE INFORMATION,
RECOMMENDATIONS, AND DESCRIPTIONS CONTAINED HEREIN.
In no event will Eaton 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 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 and descriptions contained herein.
Eaton disclaims liability for any modifications or interfaces with other equipment that are not in
conformity with the specifications and information contained within this manual. Any unauthorized
action of this kind can jeopardize operation, safety, or reliability.
The information contained in this document is believed to be accurate at the time of publication,
however, Eaton assumes no responsibility for any errors which may appear here and reserves
the right to make changes without notice.
Safety Precautions
All safety codes, safety standards, and/or regulations must be strictly observed in the installation,
operation, and maintenance of this device.

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Chapter 1:
Introduction IQ 250/260 Meter
Safety Precautions
All safety codes, safety standards, and/or regulations must be strictly observed in the installation,
operation, and maintenance of this device.
WARNINGS refer to instructions that, if not followed, can result in death or injury.
CAUTIONS refer to instructions that, if not followed, can result in equipment damage.
WARNINGS
SHOCK HAZARDS:
IMPROPER INSTALLATION CAN CAUSE DEATH, INJURY, AND/OR EQUIPMENT DAMAGE.
Follow all Warnings and Cautions. Completely read and understood the information in this
document before attempting to install or operate the equipment. Improper wiring could cause
death, injury, or equipment damage. Only qualified personnel are to service the IQ 250/260 Meter.
TROUBLESHOOTING PROCEDURES MAY REQUIRE PROXIMITY TO EXPOSED ENERGIZED
(LIVE) ELECTRICAL WIRING AND/OR PARTS WHERE THE HAZARD OF FATAL ELECTRIC
SHOCK IS PRESENT. Exercise extreme care to avoid injury or death. Always disconnect,
lock-out, and tag the current and voltage sources and the control power supply circuit before
touching the connections or components on the rear face of the meter base unit.
FAILURE TO GROUND THE IQ 250/260 METER MAY RESULT IN INJURY, DEATH, OR
EQUIPMENT DAMAGE. Properly ground the IQ 250/260 Meter during installation.
Covered by one or more of the following patents:
US Patent Numbers D526920, D525893, 6751563, 6735535, 6636030.

Chapter 2:
IQ 250/260 Meter Overview and Specifications
www.eaton.com IB02601006E 2- 1
2 Overview and Specifications
IQ 250/260 Overview
The IQ 250/260 is a multifunction power and energy meter designed to be
used in electrical substations, panel boards, and as a primary revenue
meter, due to its high performance measurement capability. The unit
provides multifunction measurement of all electrical parameters and makes
the data available in multiple formats via display, communication systems,
and through analog signal transmission.
Figure 2.1: IQ 250/260 Meter
The IQ 250/260 meter is designed with advanced meaurement capabilities, allowing it to achieve
high performance accuracy. It is specified as a 0.2% class energy meter for billing applications
as well as a highly accurate panel indication meter.
The IQ 250/260 provides additional capabilities, including standard RS485, Modbus and DNP 3.0
Protocols, and Option cards that can be added at any time.
Features of the IQ 250/260 include:
• 0.2% Class revenue certifiable energy and demand metering
• Meets ANSI C12.20 (0.2%) and IEC 687 (0.2%) classes
• Multifunction measurement including voltage, current, power, frequency, energy, power
factor, etc.
• Power quality measurements (%THD and Alarm Limits) IQ 260 only
• Percentage of Load Bar for analog meter reading
• Easy to use faceplate programming
• RS485 communication
• Optional I/O Cards - field upgradeable without removing installed meter
In addition to the IQ 250/260M - meter with integral
display/transducer configuration, an IQ 250/260T transducer
configuration is available. The IQ 250/260T is a digital transducer
only unit (without a display), providing RS485 communication
via Modbus RTU, Modbus ASCII or DNP 3.0 protocols.
The IQ 250/260T is designed to install using DIN Rail
Mounting. (See Chapter 3 of this manual for IQ 250/260T
mounting information.)
Figure 2.2: IQ 250/260T

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Chapter 2:
Overview and Specifications IQ 250/260 Meter
Voltage and Current Inputs
Universal Voltage Inputs
Voltage Inputs allow measurement up to 576VAC (Phase to Reference) and 721VAC (Phase to
Phase). This insures proper meter safety when wiring directly to high voltage systems. One unit will
perform to specification on 69 Volt, 120 Volt, 230 Volt, 277 Volt, and 347 Volt power systems.
NOTE: Higher voltages require the use of potential transformers (PTs).
Current Inputs
The unit supports a 5 amp or a 1 amp secondary for current measurements.
NOTE: The secondary current must be specified and ordered with the meter.
The IQ 250/260 Current Inputs use a unique dual input method:
Method 1: CT Pass Through
The CT passes directly through the meter without any physical termination on the meter. This
insures that the meter cannot be a point of failure on the CT circuit. This is preferable for utility
users when sharing relay class CTs. No Burden is added to the secondary CT circuit.
Method 2: Current “Gills”
This unit additionally provides ultra-rugged Termination Pass Through Bars that allow CT leads to be
terminated on the meter. This, too, eliminates any possible point of failure at the meter. This is a
preferred technique for insuring that relay class CT integrity is not compromised (the CT will not
open in a fault condition).

Chapter 2:
IQ 250/260 Meter Overview and Specifications
www.eaton.com IB02601006E 2- 3
Ordering Information
IQ - 260 - M - A - 6 - 5 - 1 - 1 - 0
1 2 3 4 5 6 7
1. Model:
250 = Power Meter
260 = Power Quality Meter
2. Meter Type
M = Meter (with integral display)
T = Transducer Only (no display)
3. Frequency:
5 = 50 Hz System
6 = 60 Hz System
4. Current Input:
5 = 5 Amp Secondary
1 = 1 Amp Secondary
5. Power Supply:
1 = Universal, (90 - 265) VAC @50/60Hz or (100-370) VDC
4 = (18 - 60) VDC
6. I/O Slot 1: (See Chapter 7 for I/O Card Specifications.)
0 = None
1 = 2 Relay Outputs/2 Status Inputs
2 = 4 KYZ Pulses/4 Status Inputs
3 = 4 Analog Outputs - 0-1 mA
4 = 4 Analog Outputs - 4-20 mA
7. I/O 2: (See Chapter 7 for I/O Card Specifications.)
0 = None
1 = 2 Relay Outputs/2 Status Inputs
2 = 4 KYZ Pulses/4 Status Inputs
3 = 4 Analog Outputs - 0-1 mA
4 = 4 Analog Outputs - 4-20 mA
Example: IQ 260-M-A-6-5-1-1-0
(IQ 260 Power Quality Meter with 60 Hz System, 5 Amp Secondary, 90-265 VAC/100-370 VDC
Power Supply, 2 Relay Outputs/2 Status Inputs I/O Card in Card Slot 1 and no card in Card Slot 2)

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Chapter 2:
Overview and Specifications IQ 250/260 Meter
Measured Values
The IQ 250/260 provides the following Measured Values all in Real-Time Instantaneous, and
some additionally as Average, Maximum and Minimum values.
IQ 250/260 Measured Values
Measured Values Instantaneous Avg Max Min
Voltage L-N X X X
Voltage L-L X X X
Current per Phase X X X X
Current Neutral X X X X
WATT(A,B,C,Tot.) X X X X
VAR (A,B,C,Tot.) X X X X
VA (A,B,C,Tot.) X X X X
PF (A,B,C,Tot.) X X X X
+Watt-Hour (A,B,C,Tot.) X
-Watt-Hour (A,B,C,Tot.) X
Watt-Hour Net X
+VAR-Hour (A,B,C,Tot.) X
-VAR-Hour (A,B,C,Tot.) X
VAR-Hour Net
(A,B,C,Tot.) X
VA-Hour (A,B,C,Tot.) X
Frequency X X X
%THD (IQ 260) X X X
Voltage Angles X
Current Angles X
% of Load Bar X

Chapter 2:
IQ 250/260 Meter Overview and Specifications
www.eaton.com IB02601006E 2- 5
Utility Peak Demand
The IQ 250/260 provides user-configured Fixed Window or Sliding Window Demand modes. This
feature enables you to set up a customized Demand profile. Fixed Window Demand mode
records the average demand for time intervals that you define (usually 5, 15 or 30 minutes).
Sliding Window Demand mode functions like multiple, overlapping Fixed Window Demands. You
define the subintervals at which an average of demand is calculated. An example of Sliding
Window Demand mode would be a 15-minute Demand block using 5-minute subintervals, thus
providing a new demand reading every 5 minutes, based on the last 15 minutes.
Utility Demand Features can be used to calculate Watt, VAR, VA and PF readings. Voltage provides
an Instantaneous Max and Min reading which displays the highest surge and lowest sag seen by the
meter. All other parameters offer Max and Min capability over the selectable averaging period.
Specifications
Power Supply
Range: 1 Option: Universal, (90 - 265)VAC @50/60 Hz or (100-370)VDC
4 Option: (18 - 60)VDC
Power Consumption: (5 to 10)VA, (3.5 to 7)W - depending on the meter’s hardware
configuration
Voltage Inputs (Measurement Category III) (See Accuracy Specifications, later in this chapter.
Range: Universal, Auto-ranging:
Phase to Reference (Va, Vb, Vc to Vref): (20 to 576)VAC
Phase to Phase (Va to Vb, Vb to Vc, Vc to Va): (0 to 721)VAC
Supported hookups: 3 Element Wye, 2.5 Element Wye, 2 Element Delta, 4 Wire
Delta
Input Impedance: 1M Ohm/Phase
Burden: 0.36VA/Phase Max at 600 Volts; 0.014VA at 120 Volts
Pickup Voltage: 20VAC
Connection: 7 Pin 0.400” Pluggable Terminal Block
AWG#12 -26/ (0.129 -3.31) mm2
Fault Withstand: Meets IEEE C37.90.1
Reading: Programmable Full Scale to any PT Ratio
Current Inputs(See Accuracy Specifications, later in this chapter.)
Class 10: 5A Nominal, 10A Maximum
Class 2: 1A Nominal, 2A Maximum
Burden: 0.005VA Per Phase Max at 11 Amps
Pickup Current: 0.1% of nominal
Connections: O Lug or U Lug Electrical Connection (Diagram 4.1)
Pass-through Wire, 0.177” / 4.5mm Maximum Diameter
(Diagram 4.2)
Quick Connect, 0.25” Male Tab (Diagram 4.3)
Fault Withstand: 100A/10sec., 300A/3sec., 500A/1sec.
Reading: Programmable Full Scale to any CT Ratio
Continuous Current
Withstand: 20 Amps for Screw Terminated or Pass Through Connections

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Chapter 2:
Overview and Specifications IQ 250/260 Meter
KYZ/RS485 Port Specifications
RS485 Transceiver; meets or exceeds EIA/TIA-485 Standard:
Type: Two-wire, half duplex
Min. Input Impedance: 96kΩ
Max. Output Current: ±60mA
Wh Pulse
KYZ output contacts (and infrared LED light pulses through face plate):
(See Chapter 6 for Kh values.)
Pulse Width: 90ms
Full Scale Frequency: ~3Hz
Contact type: Solid State – SPDT (NO – C – NC)
Relay type: Solid state
Peak switching voltage: DC ±350V
Continuous load current: 120mA
Peak load current: 350mA for 10ms
On resistance, max.: 35Ω
Leakage current: 1µA@350V
Isolation: AC 3750V
Reset State: (NC - C) Closed; (NO - C) Open
Infrared LED:
Peak Spectral Wavelength:940nm
Reset State: Off
Internal Schematic: Output timing:
(De-energized State)
NO
C
NC
90ms
90ms
][
3600
][ WattP
pulse
Watthour
Kh
sT 





⋅
=
LED
ON
LED
ON
LED
OFF
LED
OFF
LED
OFF
IR LED Light Pulses
Through face plate
NO
C
NC
NO
C
NC
NO
C
NC
NO
C
NC
NO
C
NC
KYZ output
Contact States
Through Backplate
P[Watt] - Not a scaled value
Kh – See Section 6-4 for values

Chapter 2:
IQ 250/260 Meter Overview and Specifications
www.eaton.com IB02601006E 2- 7
Isolation
All Inputs and Outputs are galvanically isolated to 2500 Vac
Environmental Rating
Storage: (-20 to +70)
0
C
Operating: (-20 to +70)
0
C
Humidity: to 95% RH Non-condensing
Faceplate Rating: NEMA12 (Water Resistant), Mounting Gasket Included
Measurement Methods
Voltage, Current: True RMS
Power: Sampling at over 400 Samples per Cycle on All Channels
Update Rate
Watts, VAR and VA: Every 6 cycles (e.g., 100 ms @ 60 Hz)
All other parameters: Every 60 cycles (e.g., 1 s @ 60 Hz)
1 second for current only measurement, if reference
voltage is not available
Communication
Standard:
1. RS485 Port through Back Plate
2. Energy Pulse Output through Back Plate
Protocols: Modbus RTU, Modbus ASCII, DNP 3.0
Com Port Baud Rate: 9,600 to 57,600 bps
Com Port Address: 001-247
Data Format: 8 Bit, No Parity
IQ 250/260T Default Initial Communication Baud 9600 (See Chapter 5)
Mechanical Parameters
Dimensions: see Chapter 3.
Weight: 2 pounds/ 0.9kg (ships in a 6”/152.4mm cube container)
(Without Option Card)

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Chapter 2:
Overview and Specifications IQ 250/260 Meter
Compliance
• UL Listing: USL/CNL E250818
• IEC 687 (0.2% Accuracy)
• ANSI C12.20 (0.2% Accuracy)•
• ANSI C62.41 (Burst)•
I C12.2• IEC 1000-4-2 - ESD
• ANSI C62.41 to be supplied before document release
Accuracy (See full Range specifications earlier in this chapter.)
For 23o C, 3 Phase balanced Wye or Delta load, at 50 or 60 Hz (as per order), 5A (Class 10)
nominal unit:
Parameter Accuracy Accuracy Input Range1
Voltage L-N [V] 0.1% of reading (69 to 480)V
Voltage L-L [V] 0.2% of reading 2(120 to 600)V
Current Phase [A] 0.1% of reading3(0.15 to 5) A
Current Neutral (calculated)
[A] 2% of Full Scale (0.15 to 5) A @ (45 to 65) Hz
Active Power Total [W] 0.2% of reading 1, 2 (0.15 to 5) A @ (69 to 480) V @ +/- (0.5 to 1) lag/lead PF
Active Energy Total [Wh] 0.2% of reading 1, 2 (0.15 to 5) A @ (69 to 480) V @ +/- (0.5 to 1) lag/lead PF
Reactive Power Total [VAR] 0.2% of reading 1, 2 (0.15 to 5) A @ (69 to 480) V @ +/- (0 to 0.8) lag/lead PF
Reactive Energy Total [VARh] 0.2% of reading 1, 2 (0.15 to 5) A @ (69 to 480) V @ +/- (0 to 0.8) lag/lead PF
Apparent Power Total [VA] 0.2% of reading 1, 2 (0.15 to 5) A @ (69 to 480) V @ +/- (0.5 to 1) lag/lead PF
Apparent Energy Total [VAh] 0.2% of reading 1, 2 (0.15 to 5) A @ (69 to 480) V @ +/- (0.5 to 1) lag/lead PF
Power Factor 0.2% of reading 1, 2 (0.15 to 5) A @ (69 to 480) V @ +/- (0.5 to 1) lag/lead PF
Frequency [Hz] +/- 0.03 Hz (45 to 65) Hz
Total Harmonic Distortion [%] +/- 2% (0.5 to 10)A4 or (69 to 480)V, measurement range (1 to 99.99)%
Load Bar +/- 1 segment (0.005 to 6) A
1 • For 2.5 element programmed units, degrade accuracy by an additional 0.5% of reading.
• For 1A (Class 2) Nominal, degrade accuracy by an additional 0.5% of reading.
• For 1A (Class 2) Nominal, the input current range for accuracy specification is 20% of the values listed
in the table.
2 For unbalanced voltage inputs where at least one crosses the 150V autoscale threshold (for example,
120V/120V/208V system), degrade the accuracy to 0.4% of reading.
3 With reference voltage applied (VA, VB, or VC). Otherwise, degrade accuracy to 0.2%. See hookup
diagrams 8, 9, and 10 in Chapter 4.
4 At least one voltage input (minimum 20 Vac) must be connected for THD measurement on current
channels.

Chapter 3:
IQ 250/260 Meter Mechanical Installation
www.eaton.com IB02601006E 3-1
3 Mechanical Installation
Introduction
The IQ 250/260 meter can be installed using a standard ANSI C39.1 (4” Round) or an IEC 92mm DIN (Square)
form. In new installations, simply use existing DIN or ANSI punches. For existing panels, pull out old analog
meters and replace them with the IQ 250/260. The various models use the same installation. See Chapter 4 for
wiring diagrams.
NOTE: The drawings shown below and on the next page give you the meter dimensions in inches and
millimeters (mm shown in brackets). Tolerance is +/- 0.1” [2.54 mm].
Figure 3.1: IQ 250/260 Face Figure 3.2: IQ 250/260 Dimensions
Figure 3.3: IQ 250/260T Dimensions
3.54[89.92]
0.06 [1.59]
0.77 [19.55]
4.85 [123.19]
0.91 [23.11]
5.02 [127.51]
0.77[19.55]
Gasket
3.25 [82.55]
4.85 [123.19]
4.85 [123.19]
3.54 [89.92] 3.25 [82.55]
0.95 [24.04]
3.54[89.92]
0.06 [1.59]
0.77 [19.55]
4.85 [123.19]
0.91 [23.11]
5.02 [127.51]
0.77[19.55]
Gasket
3.25 [82.55]
4.85 [123.19]
4.85 [123.19]
3.54 [89.92] 3.25 [82.55]
0.95 [24.04]
3.54[89.92]
0.06 [1.59]
0.77 [19.55]
4.85 [123.19]
0.91 [23.11]
5.02 [127.51]
0.77[19.55]
Gasket
3.25 [82.55]
4.85 [123.19]
4.85 [123.19]
3.54 [89.92] 3.25 [82.55]
0.95 [24.04]

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Chapter 3:
Mechanical Installation IQ 250/260 Meter
Fig. 3.4: IQ 250/260 Back Face Figure 3.5: ANSI Mounting Panel Cutout
Figure 3.6: DIN Mounting Cutout
3.54[89.92]
0.06 [1.59]
0.77 [19.55]
4.85 [123.19]
0.91 [23.11]
5.02 [127.51]
0.77[19.55]
Gasket
3.25 [82.55]
4.85 [123.19]
4.85 [123.19]
3.54 [89.92] 3.25 [82.55]
0.95 [24.04]

Chapter 3:
IQ 250/260 Meter Mechanical Installation
www.eaton.com IB02601006E 3-3
ANSI Installation Steps
1. Insert 4 threaded rods by hand into the back of meter. Twist until secure.
2. Slide NEMA 12 Mounting Gasket onto back of meter with rods in place.
3. Slide meter with Mounting Gasket into panel.
4. Secure from back of panel with lock washer and nut on each threaded rod.
Use a small wrench to tighten. Do not overtighten.
NEMA 12 Mounting Gasket
Threaded Rods
Lock Washer
and Nut
Figure 3.7: ANSI Mounting Procedure

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Chapter 3:
Mechanical Installation IQ 250/260 Meter
DIN Installation Steps
1. Slide meter with NEMA 12 Mounting Gasket into panel. (Remove ANSI Studs, if in place.)
2. From back of panel, slide 2 DIN Mounting Brackets into grooves in top and bottom of
meter housing. Snap into place.
3. Secure meter to panel with lock washer and a #8 screw through each of the 2 mounting
brackets. Tighten with a #2 Phillips screwdriver. Do not overtighten.
DIN Mounting Bracket
Top Mounting Bracket Groove
Bottom Mounting Bracket Groove
#8 Screw
IQ 250/260 Meter
with NEMA 12 Mounting
Gasket
Remove (unscrew) ANSI
Studs for DIN Installation
Figure 3.8: DIN Mounting Procedure