CTI 2553 TWO CHANNEL INSTALLATION AND OPERATION GUIDE Version 2.4

CTI 2553 TWO CHANNEL INSTALLATION AND OPERATION GUIDE Version 2.4
CTI 2553 TWO CHANNEL
ISOLATED MAG METER INPUT MODULE
INSTALLATION AND OPERATION GUIDE
Version 2.4
CTI Part #062-00120-024
2553IOG 092205
$25
Copyright © 2005 Control Technology Inc.
All rights reserved.
This manual is published by Control Technology Inc., 5734 Middlebrook Pike, Knoxville, TN 37921.
This manual contains references to brand and product names which are tradenames, trademarks, and/or
registered trademarks of Control Technology Inc. Siemens® and SIMATIC® are registered trademarks
of Siemens AG. Other references to brand and product names are tradenames, trademarks, and/or
registered trademarks of their respective holders.
DOCUMENT DISCLAIMER STATEMENT
Every effort has been made to ensure the accuracy of this document; however, errors do occasionally
occur. CTI provides this document on an "as is" basis and assumes no responsibility for direct or
consequential damages resulting from the use of this document. This document is provided without
express or implied warranty of any kind, including but not limited to the warranties of merchantablility
or fitness for a particular purpose. This document and the products it references are subject to change
without notice. If you have a comment or discover an error, please call us toll-free at 1-800-537-8398.
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PREFACE
This Installation and Operation Guide provides installation and operation instructions for the
CTI 2553 Two Channel Isolated MAG METER Module for SIMATIC® 505 Series programmable
controllers. We assume you are familiar with the operation of SIMATIC® 505 Series programmable
controllers. Refer to the appropriate SIMATIC® user documentation for specific information on the
SIMATIC® 505 Series programmable controllers and I/O modules.
This Installation and Operation Guide is organized as follows:
Chapter 1 provides a description of the module.
Chapter 2 covers installation and wiring.
Chapter 3 is a guide to troubleshooting.
Figure 1 The Model 2553 2-Channel Isolated MAG METER Input
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USAGE CONVENTIONS
NOTE:
Notes alert the user to special features or procedures.
CAUTION:
Cautions alert the user to procedures which could damage equipment.
WARNING:
Warnings alert the user to procedures which could damage equipment and endanger the user.
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TABLE OF CONTENTS
PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
USAGE CONVENTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
TABLE OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
CHAPTER 1. DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Asynchronous Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Normal Count Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 N-Tooth Count Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Digital Word Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Overrange/Underrange Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CHAPTER 2. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Planning the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Calculating the I/O Base Power Budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Unpacking the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Configuring the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4.1 Selecting Normal Count Mode or N-Tooth Count Mode . . . . . . . . . . . . . . . . . 7
2.4.2 Selecting the Number of Teeth on the Wheel (N-Tooth Mode Only) . . . . . . . . 7
2.4.3 Selecting the Frequency or Period Reporting . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4.4 Selecting Digital Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4.5 Selecting Input Signal Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4.6 Open Collector Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4.7 Standard Shipping Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5 Inserting the Module into the I/O Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.6 Wiring the Input Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6.1 Connecting the Shield Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.7 Checking Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CHAPTER 3. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
LIMITED PRODUCT WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
REPAIR POLICY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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TABLE OF FIGURES
Figure 1 The Model 2553 2-Channel Isolated MAG METER Input . . . . . . . . . . . . . . . . . . . . . . . . v
Figure 2 Word Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 4 Overrange/Underrange Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 3 Overrange/Underrange Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 5 Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 6 Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 7 Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 8 Open Collector Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 9 Open Collector External Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 10 Input Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 11 Shield Wire Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 12 Typical Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 13 Typical Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 14 I/O Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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CHAPTER 1. DESCRIPTION
The Two Channel MAG METER Input Module is a member of Control Technology's family of I/O
modules compatible with the SIMATIC® 505 Series programmable controllers. The Model 2553 is
designed to measure the frequency or period of Mag Meter or Turbine Meter pulses and convert the
frequencies into equivalent digital words which are then sent to the programmable controller (PLC).
1.1 Asynchronous Operation
The module operates asynchronously with respect to the PLC; a scan of the PLC and input sampling of
the module do not occur at the same time. Instead, the module will translate all inputs in one module
update (7 mSec - in normal pulse count mode) and store the translated words in a buffer memory. The
PLC retrieves the stored words from the module buffer memory at the start of the I/O scan.
1.2 Operating Modes
1.2.1 Normal Count Mode
In normal count mode, the 2553 precisely measures the amount of time between teeth (or blades) of the
device being monitored. Normal count mode uses a measurement technique called "Reflex Counter" to
achieve the high accuracy and high speed of the measurement. A reflex counter is basically an autoranging counter. Each input channel consists of an incoming pulse counter, a 5 MHz clock counter and
appropriate gating and reset circuits. The following paragraph describes a typical measurement.
The first incoming pulse enables both the pulse counter and 5 MHz clock counter. The 2553 counts
pulses and clocks until the clock counter is half full. On the next pulse input, the 2553 computes the
frequency based on the number of 5 MHz clock pulses counted and the number of incoming pulses
counted and outputs the value to the PLC. The frequency is derived by the following formula:
Number of Input Pulses x Clock Frequency (Hz)
Frequency (Hz) =
Number of Clock Counts
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If an overflow is detected on the incoming pulse counter, the overrange/underrange bit will be set and
65535 will be reported to the PLC (see Section 1.4). If an overflow is detected on the 5 MHz clock
counter, the overrange/underrange bit will be set and 0 will be reported to the PLC (see Section 1.4).
1.2.2 N-Tooth Count Mode
In N-Tooth count mode, the 2553 measures the amount of time of a full revolution of the wheel (based
on the number of teeth entered in dip switch). The N-Tooth count mode is useful for compensating for
errors introduced by wheel wobble (an effect that occurs when the wheel being measured is not
perfectly round). Each input channel consists of an incoming pulse counter, a 5 MHz clock counter, a
scaling dip switch, and appropriate gating and reset circuits. The following paragraph describes a
typical measurement.
The first incoming pulse enables both the pulse counter and 5 MHz clock counter. The 2553 counts
pulses and clocks until the pulse counter overflows. The 2553 computes the frequency based on the
number of 5 MHz clock counts and the value entered in the dip switch (see Section 2.4.2).
1.3 Digital Word Map
Frequencies or period measurements are translated into a 16-bit digital word. The following figure
shows the bit positions and magnitudes in a typical digital word.
Figure 2 Word Map
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1.4 Overrange/Underrange Reporting
With no frequency input, the 2553 will report 0 in the data register (see Figure 2). The
overrange/underrange bit (see Figure 3) will be set to 0.
For frequencies under 76 Hz, the 2553 will report 0 in the data register (see Figure 2). The
overrange/underrange bit (see Figure 5) will be set to 1.
For frequencies between 76 Hz and 65535 Hz, the 2553 will report the correct frequency (or period if
set for period mode) in the data register (see Figure 2). The overrange/underrange bit (see Figure 4)
will set to 0.
For frequencies over 65535 Hz, the 2553 will report 65535 in the data register (see Figure 2). The
overrange/underrange bit (see Figure 5) will be set to 1.
Figure 3 Overrange/Underrange Bits
Figure 4 Overrange/Underrange Truth Table
NOTE:
A failed pickup or an open circuit may be detected by examining the data register and the
overrange/underrange bit. If both are zero then there is no longer any input signal on the 2553
connector.
1.5 Resolution
The 2553 has a resolution of ±1 Hz.
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CHAPTER 2. INSTALLATION
The installation of the Two Channel MAG METER Input Module involves the following steps:
1. Planning the installation
2. Configuring the module
3. Inserting the module into the base
4. Wiring the module input connector
5. Checking module operation
The steps listed above are explained in detail in the following pages.
2.1 Planning the Installation
Planning is the first step in the installation of the module. This involves calculating the I/O base power
budget and routing the input signal wiring to minimize noise. The following sections discuss these
important considerations.
2.2 Calculating the I/O Base Power Budget
The 2553 requires 2.5 watts of +5V power from the I/O base. Use this figure to verify that the base
power supply capacity is not exceeded.
2.3 Unpacking the Module
Open the shipping carton and remove the special anti-static bag which contains the module.
CAUTION:
HANDLING STATIC SENSITIVE DEVICES
The components on the Model 2553 module printed circuit card can be damaged by static
electricity discharge. To prevent this damage, the module is shipped in a special anti-static
bag. Static control precautions should be followed when removing the module from the bag,
when opening the module, and when handling the printed circuit card during configuration.
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After discharging any static build-up, remove the module from the static bag. Do not discard the static
bag. Always use this bag for protection against static damage when the module is not inserted into the
I/O backplane.
2.4 Configuring the Module
The Model 2553 must be configured to operate in normal counting mode or N-Tooth counting mode.
The module must also be configured to report the measurements in "Frequency" or "Period" and digital
filtering/no filtering mode before inserting the module into the I/O base. As shipped, the module is
configured for normal counting mode, "Frequency" and digital filtering disabled
(see Figure 5).
Changing the module input channel configuration involves the following steps:
1. Select Normal or N-Tooth Counting mode for each channel.
2. Select the number of teeth on the wheel (N-Tooth mode only).
3. Select frequency or period measurement for the module.
4. Select digital filtering or no filtering for the module.
5. Select proper input signal conditioning.
Each of these steps is described in the following sections.
Figure 5 Jumper Locations
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2.4.1 Selecting Normal Count Mode or N-Tooth Count Mode
Locate the Normal/N-Tooth jumpers (see Figure 5). Each channel can be independently configured for
either counting mode. Jumper JP3 is used for channel 1, jumper JP4 is used for channel 2.
2.4.2 Selecting the Number of Teeth on the Wheel (N-Tooth Mode Only)
Dip switches SW1 and SW2 are used to tell the module how many teeth are on the wheel being
measured. For proper internal scaling in the module, enter 1 less than the number of teeth on the
wheel. Dip switch SW1 is used for channel 1, dip switch SW2 is used for channel 2.
Figure 6 Dip Switch Settings
2.4.3 Selecting the Frequency or Period Reporting
Locate the Period/Frequency jumper JP2 (see Figure 5). To select frequency measurement, set the
jumper in the FREQ position. To select period measurement, set the jumper in the PERIOD position.
2.4.4 Selecting Digital Filtering
Locate the Digital Filtering jumper JP1 (see Figure 5). To enable digital filtering, set the jumper in the
ENABLED position. Since many signals have timing jitter, CTI recommends using digital filtering
unless maximum response is required.
2.4.5 Selecting Input Signal Conditioning
Each of the inputs of the Model 2553 may be configured to support bipolar, positive pulse, negative
pulse or open collector applications. Jumpers JP5 for Channel 1 and JP7 for Channel 2 allow each
channel to be independently configured.
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Figure 7 Jumper Locations
-P, Negative Pulse: Devices that generate a negative pulse between ground and a negative voltage.
+P, Positive Pulse: Devices that generate a positive pulse between ground and a positive voltage.
BP, Bipolar: Devices that generate a sinusoidal or bipolar (square wave) output.
2.4.6 Open Collector Conditioning
Each input channel may be driven by an external device with open collector output drive. Jumpers JP8
and JP9 are used to configure the input channels for open collector operation.
Figure 8 Open Collector
Selection
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When selecting open collector operation the 2553 input is connected through a 10kS resistor to
+15VDC
internally on the circuit
board. No
pullup resistor or
power supply is
required.
Figure 9 Open Collector External
Device
2.4.7 Standard Shipping Configuration
The Model 2553 is shipped from the factory with both channels configured for normal operation and
with bipolar signal conditioning.
WARNING:
The module must not be inserted into the I/O rack while power is applied.
2.5 Inserting the Module into the I/O Base
Insert the module into the I/O base by carefully pushing the module into the slot. When the module is
fully seated in the slot, tighten the captive screws at the top and bottom to hold the module in place. To
remove the module from the I/O base, loosen captive screws, then remove the module from the I/O
base. Be careful not to damage the connector card at the back of the module when inserting or
removing the module.
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2.6 Wiring the Input Connectors
Mag Meter input signals are accepted through removable screw terminal connector blocks located on
the front of the module (see Figures 7 and 8).
Input signal wiring must be shielded, twisted-pair cable.
Always use the shortest possible cables
Avoid placing low voltage wire parallel to high energy wire (if the two wires must meet, cross
them at a right angle).
Avoid bending the wire into sharp angles.
Use wireways for wire routing.
Avoid placing wires on any vibrating surface.
Figure 10 Input Connectors
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2.6.1 Connecting the Shield Wiring
Control Technology Inc. recommends that all wires be shielded twisted pair with a foil wrap shield and
a separate drain wire and that they be installed in a metallic conduit. Use Belden cable 8761 or
equivalent which contains a foil wrap shield and a separate drain wire. The shield and the foil wrap
should be twisted together and should be terminated at only one end. The other end should be left in an
open circuit condition. CTI recommends that the shield be terminated at the PLC end of the signal wire.
Special components are installed on the module to aid in the rejection of noise.
When entering the industrial cabinet the shield wires should be routed from the main terminal strip all
the way to the PLC. Signal leads that do not maintain a shield from the terminal strip of the PLC act as
antennas and are susceptible to radiated and conducted emissions in the cabinet. Unprotected cables
may introduce measurement errors in the module.
The front connector on the module contains a COM terminal which may be used for the shield wire if
the installation is in a noise free environment. If the installation is in an extremely noisy environment
CTI strongly recommends that the shielded wires be terminated to the PLC chassis ground.
CTI has exhaustively tested this product to maximize its ability to reject noise from inductive sources
as well as showering arcs, fast transients and other high frequency generators and has determined that
the best performance results from connecting all shield wires together at the PLC module and
terminating this single wire to the chassis ground with a large current capacity conductor. The PLC
chassis should then be wired to earth ground with a large current capacity conductor. CTI recommends
using a #8 gauge wire or larger from the PLC chassis to the earth ground connection.
Figure 11 Shield Wire Termination
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Figure 12 Typical Wiring Diagram
Figure 13 Typical Application
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2.7 Checking Module Operation
First turn on the base supply power. If the module diagnostics detect no problems, the status indicator
on the front of the module will light. If the status indicator does not light (or goes out during operation),
the module has detected a failure. For information on viewing failed module status, refer to your
SIMATIC® TISOFT user manual. To diagnose and correct a module failure, refer to the next section
on troubleshooting.
You must also check that the module is configured in the memory of the PLC. This is important
because the module will appear to be functioning regardless of whether it is communicating with the
PLC. To view the PLC memory configuration chart listing all slots on the base and the inputs or
outputs associated with each slot, refer to your SIMATIC® TISOFT Programming Manual. An
Figure 14 I/O Configuration
example chart is shown in the following figure.
In this example, the 2553 module is inserted in slot 1 in I/O base 0. Data for channel 1 appears in word
location WX1, data for channel 2 appears in word location WX2. Overrange/Underrange bits appear in
word location WX3. WX4 thru WX8 are unused. For your particular module, look in the chart for the
number corresponding to the slot occupied by the module. If word memory locations appear on this
line, then the module is registered in the PLC memory and the module is ready for operation.
If the line is blank or erroneous, re-check the module to ensure that it is firmly seated in the slots.
Generate the PLC memory configuration chart again. If the line is still incorrect, contact your local
distributor or CTI at 1-800-537-8398 for futher assistance.
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CHAPTER 3. TROUBLESHOOTING
If the module provides improper readings or the status indicator is not on, use the following chart to
determine the appropriate corrective action.
If after consulting the chart above, you are unable to diagnose or solve the problem, contact your local
distributor or CTI at 1-800-537-8398 for further assistance.
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SPECIFICATIONS
Channels Per Module:
2 (two)
Size:
Single wide 505 module
Input Voltage Range:
Sinusoidal:
140 mV to 50 VRMS (differential input into 10 KS)
200 mV to 70 V peak
TTL:
Positive
Negative
Bipolar
Maximum input ±28VDC
less than 0.8 = 0
greater than 2.4 = 1
Input Frequency Range:
78 Hz to 65 KHz
Data Reporting:
Reports in frequency (Hz) or period (mSec)
(User selectable)
Frequency Roll-Off:
3 dB @ 20 KHz
6 dB per octave
Input Protection:
50 VRMS continuous
20,000 Volts ESD
Digital Filtering:
User enabled (50 mSec Time Constant)
Update Time:
7 mSec (in normal counter mode)
Accuracy:
±1 Hz
Module Power from Base:
2.5 Watts @ +5 VDC
Isolation:
1500 VDC channel-to-channel
1500 VDC channel-to-PLC
Field Wiring Connector:
Removable, accepts 12-26 AWG
Mechanical:
Size single-wide 505 module
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Operating Temperature:
0/ to 60/C (32/ to 140/F)
Storage Temperature:
-40/ to 85/C (-40/ to 185/F)
Humidity, Relative:
5% to 95% (non-condensing)
Shipping Weight:
1.5 lbs. (0.68 Kg)
Agency Approvals Pending:
UL, UL for Canada
FM Class 1 Div 2, CE
Specifications subject to change without notice.
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LIMITED PRODUCT WARRANTY
CTI warrants that this CTI Industrial Product shall be free from defects in material and workmanship
for a period of one (1) year after purchase from CTI or from an authorized CTI Industrial Distributor.
This CTI Industrial Product will be newly manufactured from new and/or serviceable used parts which
are equal to new in the Product.
Should this CTI Industrial Product fail to be free from defects in material and workmanship at any time
during this one (1) year warranty period, CTI will repair or replace (at its option) parts or Products
found to be defective and shipped prepaid by the customer to a designated CTI service location along
with proof of purchase date and associated serial number. Repair parts and replacement Product
furnished under this warranty will be on an exchange basis and will be either reconditioned or new. All
exchanged parts or Products become the property of CTI. Should any Product or part returned to CTI
hereunder be found by CTI to be without defect, CTI will return such Product or part to the customer.
This warranty does not include repair of damage to a part or the Product resulting from: failure to
provide a suitable environment as specified in applicable Product specifications, or damage caused by
an accident, disaster, acts of God, neglect, abuse, misuse, transportation, alterations, attachments,
accessories, supplies, non-CTI parts, non-CTI repairs or activities, or to any damage whose proximate
cause was utilities or utility like services, or faulty installation or maintenance done by someone other
than CTI.
Control Technology Inc. reserves the right to make changes to the Product in order to improve
reliability, function, or design in the pursuit of providing the best possible Product. CTI assumes no
responsibility for indirect or consequential damages resulting from the use or application of this
equipment.
THE WARRANTY SET FORTH ABOVE IN THIS ARTICLE IS THE ONLY WARRANTY
CTI GRANTS AND IT IS IN LIEU OF ANY OTHER IMPLIED OR EXPRESSED
GUARANTY OR WARRANTY ON CTI PRODUCTS, INCLUDING WITHOUT
LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A
PARTICULAR PURPOSE AND IS IN LIEU OF ALL OBLIGATIONS OR LIABILITY OF
CTI FOR DAMAGES IN CONNECTION WITH LOSS, DELIVERY, USE OR
PERFORMANCE OF CTI PRODUCTS OR INTERRUPTION OF BUSINESS, LOSS OF
USE, REVENUE OR PROFIT. IN NO EVENT WILL CTI BE LIABLE FOR SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS, SO THE ABOVE
LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE
OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE.
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CT I 2553 Installation and O peration G uide
REPAIR POLICY
In the event that the Product should fail during or after the warranty period, a Return Material
Authorization number (RMA) can be requested verbally or in writing from CTI main offices. Whether
this equipment is in or out of warranty, a Purchase Order number provided to CTI when requesting the
RMA number will aid in expediting the repair process. The RMA number that is issued and your
Purchase Order number should be referenced on the returning equipment's shipping documentation.
Additionally, if under warranty, proof of purchase date and serial number must accompany the
returned equipment. The current repair and/or exchange rates can be obtained by contacting CTI's
main office at 1-800-537-8398.
When returning any module to CTI, follow proper static control precautions. Keep the module away
from polyethylene products, polystyrene products and all other static producing materials. Packing the
module in its original conductive bag is the preferred way to control static problems during shipment.
Failure to observe static control precautions may void the warranty. For additional information on
static control precautions, contact CTI's main office at 1-800-537-8398.
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