SKF CMPT CTU Bedienungsanleitung

SKF Copperhead Transmitter Unit (CMPT CTU)

for Machinery Fault Detection

Aurorum 30, 977 75 Luleå

Sweden

Telephone: +46 (0) 920 758 00, Fax: +46 (0) 920 134 40

Part No. 32163100

Revision D

Instruction Manual

SKF Reliability Systems

SKF Condition Monitoring Center

Aurorum 30

977 75 Luleå

Sweden

Telephone +46 (0) 920 758 00

FAX +46 (0) 920 134 40

For technical support, contact:

[email protected]

[email protected] for customers in North and South

America.

Visit us at our web site

www.skf.com/cm

® SKF is a registered trademark of the SKF Group

SKF Copperhead Transmitter Unit CMPT CTU TOC-3

Instruction Manual

Table of Contents

Description 1 - 4

Features 2 - 5

Specifications 3 - 7

Dimensions/Front panel/Terminals 4 - 9

....................................................................................................4 - 9

Front Panel Rotary Switches

....................................................................................................4 - 11

Connector Assignment

Caution 5 - 12

CMPT CTU Output Signal Scales 6 - 13

....................................................................................................6 - 13

Vibration

....................................................................................................6 - 16

Temperature

Basic Instructions and Wiring Connections 7 - 17

....................................................................................................7 - 17

General Instructions

....................................................................................................7 - 18

Normal Wiring as Vibration and Temperature (optional) Transmitter

....................................................................................................7 - 20

Normal Wiring as Vibration and Temperature (optional) Transmitter with

CMPT DCL Modules for Stand Alone Monitoring

....................................................................................................7 - 21

Parallel Wiring with Secondary CTU

CMPT CTU Output 8 - 22

Interface with Dataloggers and Vibration Systems 9 - 24

CTU CAN-bus 10 - 25

....................................................................................................10 - 25

CTU CAN-bus Connection

....................................................................................................10 - 27

CTU CAN Protocol

....................................................................................................10 - 28

Services

....................................................................................................10 - 30

Unit Address

....................................................................................................10 - 32

Overall Measurement Values

Description

SKF Copperhead Transmitter Unit CMPT CTU1-4

Instruction Manual

Description

Figure 1-1: CMPT CTU (Copperhead Transmitter Unit)

This instruction manual provides detailed wiring connection and configuration

information for the CMPT CTU (Copperhead Transmitter Unit) vibration and

temperature transmitter. The CMPT CTU is configured by SKF when it is part of an

assembled CMPT enclosure. The CMPT CTU must otherwise be properly installed and

configured by the user. This instruction manual provides the user with information on

how to properly install and configure the CTU and change the default configuration

settings.

Please read this instruction manual and the cautionary notes thoroughly.

The SKF CTU is a digital vibration and temperature transmitter. It can be used as a part

of a machinery fault detection system. The CTU performs three types of vibration signal

process analysis – SKF Acceleration Enveloping (gE), Acceleration (g), or Velocity (mm/s

or inch/s). The type of vibration analysis is user configurable. The CTU has analog

output signals proportional to processed vibration analysis and temperature for

connection to automation systems and SKF CMPT DCL monitors. The CTU is user

configurable to process vibration signals from the SKF CMPT family of sensors or other

industrial accelerometers.

Acceleration Enveloping vibration analysis is used to identify repetitive impact type

vibrations generated by machinery faults due to loose components, gear faults, lack of

lubrication and rolling bearing faults.

Acceleration vibration analysis is used to monitor overall machinery and structural

vibration, including machinery having journal bearings. It can also be used to measure

the overall operation of vibrating screens and other vibrating equipment.

Velocity vibration analysis is used to identify overall machinery vibration levels such as

looseness and unbalance, including machinery support by journal bearings.

The CMPT CTU has unique features to monitor both high speed and low speed

machinery (n <40 r/min).

SKF Copperhead Transmitter Unit CMPT CTU 2-5

Features

Instruction Manual

Features

·Suitable with accelerometer sensors (10 mV/g to 230 mV/g).

·Temperature converter for accelerometers with integral temperature sensors.

·Three user selectable vibration process analyses:

- SKF Acceleration Enveloping (ENV3), gE

- Acceleration (RMS and Peak Hold), g

- Velocity ISO, mm/s (inch/s)

·User configurable features on the front panel:

- Vibration analyzer

- Output Range

- Optional sensor input or buffered vibration output input

- Optional signal decay for Acceleration Enveloping Peak hold

- Optional output signal averaging.

·Analog output signals - Processed vibration and temperature for interface with

PLC/DCS and CMPT DCL alarm/display monitors.

·35 mm DIN rail mounted with rugged steel retainer clip.

·Front panel mounted BNC connector for buffered vibration and temperature

measurements.

·Front panel sensor OK/Overload lamp for detection of sensor and CTU faults.

·CAN-bus interface for connectivity of multiple numbers of CTU and remote

monitoring via computer.

·Internal isolated DC/DC converter for grounding loop and reverse polarity

protection.

·Auxiliary 24 V DC voltage output for optional powering of other sensor types

(tachometer).

The software to process the vibration and temperature signals is embedded into the

digital signal processing (DSP) card in the CTU. Calibration of the CTU is a part of the

embedded software.

The CTU unit has two front panel rotary switches to set the configuration. There is no

need to open the CTU enclosure to adjust pins or jumpers. The BNC connector is front

panel switchable (BNC switch) to measure either the accelerometer sensor buffered

(not processed) vibration output or the sensor temperature output. The buffered

vibration output can be monitored with an SKF Microlog or equivalent device.

The CTU has a user configurable option to average the analog output signals so that

rapid changes in vibration input do not cause annoying fluctuations in PLC/DCS or

digital displays.

The CTU has a user configurable option of 1 second or 10 second signal decay time for

Acceleration Enveloping Peak hold. The 10 second signal decay time is recommended

for low speed (n <40 r/min) applications where the frequency of the mechanical impact

vibration is low. Normal operation of the CTU is with the 1 second signal decay time.

The CTU can be user configured to accept a constant current signal from another CTU

operating with an accelerometer sensor. This enables two CTUs having different

configurations such as one Acceleration Enveloping and one Velocity to monitor the

same accelerometer sensor signal.

Features

SKF Copperhead Transmitter Unit CMPT CTU2-6

Instruction Manual

The CTU has a front panel mounted SENSOR OK lamp to indicate that the sensor is

correctly connected to the CTU and that the sensor (accelerometer and temperature)

and the CTU are operating correctly.

- Green indicates that the system is OK (Correct).

- Red indicates that the system has a fault with the sensor or CTU, or that the

vibration level or temperature exceeds the set RANGE (overload).

The CTU can be located up to 100 m (330 feet) from the sensor with suitable shielded

cabling. The CMPT DCL display/alarm module can be used along with the CMPT CTU

module to have a stand-alone monitoring of processed vibration. A second DCL module

can be used to optionally monitor temperature from a CTU connected to a CMPT 2310T

or CMPT 2323T sensor. The CMPT DCL is a single channel display/alarm module. It

displays the live value from CTU on the front panel which is programmable. IT also has

relay contacts for independent monitoring of the processed signals from the CTU. See

the CMPT DCL data sheet.

Each CTU has a CAN-bus interface for remote communication with an industrial PC

using an SKF protocol software. This enables remote configuration and monitoring of

the CTU. The CAN-bus allows multiple numbers of CTU modules to be joined by a

common CAN-bus connecting cable. This greatly reduces the wiring connections needed

compared to the analog output signal cable requirements.

The CTU has an auxiliary 24 V DC power output for optional use to energize alternative

sensors (20 mA maximum).

The CTU has an internal isolated DC/DC converter to avoid grounding loop problems.

This isolates the 24 V power supply and the CAN-bus from the sensor input circuitry

and the analog sensor output circuitry. The power input is protected from reverse

polarity connections.

SKF Copperhead Transmitter Unit CMPT CTU 3-7

Specifications

Instruction Manual

Specifications

Input signals

Industrial accelerometer (2 wire, constant current source with voltage output)

Accelerometer sensitivity: 10 to 230 mV/g

Bias voltage: 12 V DC +/- 1 V

Supply current: 4 to 8 mA

Buffered acceleration signal

output from another CTU Buffered signal input mode

Supply voltage: 5 to 19 V

Temperature: 0 to 1,2 V DC @ 0,01 mV/°C

Environmental

Operating temperature: 0 to 70 °C (32 °F to 160 °F)

Storage temperature: -40 °C to 85 °C (-40 °F to 185 °F)

Humidity: 95 % maximum

IP rating: IP20

Vibration: IEC68-2-6

Shock: IEC68-2-27

Bump: IEC68-2-29

Mechanical

Weight: 0,225 kg (0,102 lbs)

Enclosure: Thermoplastic ABS

Color: Gray

Connectors: Two 8-pole pluggable screw clamp type

Wiring: 0,2 to 2,5 mm (24 to 12 AWG)

Mounting: 35 mm DIN-rail type EN50022 with steel retaining

clip

Dimensions (H x W x D): 75 x 45 x 118 mm

(2,95 x 1,77 x 4,65 inches)

Electrical

Power: 24 V DC (22 to 28 V DC)

250 mA current, maximum

CTU is reverse power protected

Power consumption: 6 W

Vibration process analysis

Acceleration Enveloping, gE

ENV3: 500 Hz – 10 kHz

Acceleration, g

Accel RMS: 3 Hz – 10 kHz

Accel Peak Hold: 3 Hz – 10 kHz

Velocity, mm/s (inch/s)

ISO: 10 Hz – 1 kHz

2 Hz – 1 kHz

Specifications

SKF Copperhead Transmitter Unit CMPT CTU3-8

Instruction Manual

Processed analog output signals

Vibration: 4 to 20 mA; 0 to 10 V DC

Proportional to the input sensitivity of the

accelerometer and the user defined signal

processing method (Acceleration Enveloping,

Acceleration or Velocity) and RANGE.

See Section 3.

Temperature: 4 to 20 mA; 0 to 10 V DC

Proportional to 0 °C to 120 °C

Analog signal less than 4 mA or greater than 20 mA indicates a system fault.

Auxiliary power:+24 V DC / 20 mA maximum

Approvals: CE

Emission 50081-2

Immunity 50082-2

SKF Copperhead Transmitter Unit CMPT CTU 4-9

Dimensions/Front panel/Terminals

Instruction Manual

Dimensions/Front panel/Terminals

Front Panel Rotary Switches

Figure 4-2: Dimensions and front panel

FUNCTION switch legend

0 Velocity (ISO), 10 Hz – 1 kHz

1 Velocity, 2 Hz – 1 kHz

4 Acceleration Peak Hold, 1 second decay

5 Acceleration Peak Hold, 10 seconds decay

6 Acceleration RMS, 1 second decay

7 Acceleration RMS, 10 seconds decay

C Acceleration Enveloping 3 (ENV3), 1 second decay

D Acceleration Enveloping 3 (ENV3), 10 second decay

RANGE switch legend

0 Range 0, Accelerometer sensor input ON, Output averaging OFF

1 Range 1, Accelerometer sensor input ON, Output averaging OFF

2 Range 2, Accelerometer sensor input ON, Output averaging OFF

3 Range 3, Accelerometer sensor input ON, Output averaging OFF

4 Range 0, Accelerometer sensor input ON, Output averaging ON

5 Range 1, Accelerometer sensor input ON, Output averaging ON

6 Range 2, Accelerometer sensor input ON, Output averaging ON

7 Range 3, Accelerometer sensor input ON, Output averaging ON

8 Range 0, Buffered signal input ON, Output averaging OFF

9 Range 1, Buffered signal input ON, Output averaging OFF

A Range 2, Buffered signal input ON, Output averaging OFF

B Range 3, Buffered signal input ON, Output averaging OFF

C Range 0, Buffered signal input ON, Output averaging ON

D Range 1, Buffered signal input ON, Output averaging ON

E Range 2, Buffered signal input ON, Output averaging ON

F Range 3, Buffered signal input ON, Output averaging ON

Dimensions/Front panel/Terminals

Front Panel Rotary Switches

SKF Copperhead Transmitter Unit CMPT CTU4-10

Instruction Manual

SENSOR OK lamp

Green Accelerometer and temperature sensor and CTU are

operating correctly

Green (flashing) CTU is settling output because of change in rotary switch

setting

Red Fault with sensors or vibration exceeds set RANGE *

Red (flashing) Vibration or temperature input signal exceeds full Scale

Red/Green (flashing) Unit failure (return to SKF for repair)

* The SENSOR OK lamp will be red if the temperature sensor is not connected. A 100 Wor a 120 Wresistor

is required between CTU terminals 2 and 3 to avoid the red SENSOR OK lamp.

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