STI CMCP700S-CVT Series User manual

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CMCP700S-CVT Series
User Manual
Ver. 1.1
Released July 27, 2021

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Table of Contents
Description
3
Power
3
Opening the Case
3
Configuring the Transmitter
3
Engineering Unit Selection
4
Full Scale Range Settings
4
Low Pass Filter Settings
5
Temperature Output
5
Buffered Output
5
Sensor Fault Detection
5
4-20mA Outputs
5
Wiring
5
Terminal Pin Assignments
6
Dimensions
6
Troubleshooting
7
Maintenance and Calibration
7
Technical Specifications
7

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Description
The CMCP700S-CVT is compatible with all industry standard IEPE Accelerometers and Piezo-Velocity transducers.
Each transmitter provides constant current power for the associated sensor and processes the signal through a
True RMS detector to determine the overall amplitude in terms of Acceleration or Velocity. A 4-20mA output
proportional to one of the three user selectable ranges can then be sent to the plant’s PLC, DCS, SCADA or other
control system to allow operations and maintenance staff to view real time machinery health, set alarms and
trigger machine shutdowns for scheduled preventative maintenance. An OK Fault Detection Circuit is provided so
hardware or power failures will prompt the front panel LED to change (from green to red). Multiple transmitters
can be combined into a single enclosure or cabinet to create a cost effective, multichannel machine protection
system with solid state reliability. The CMCP700S-CVT features an additional temperature output which provides a
second 4-20mA output for dual output accelerometers such as the CMCP786T.
Available Model Numbers
CMCP700S-CVT Vibration and Temperature Output (Dual 4-20mA Output)
Power
The CMCP700S Series Transmitters require externally supplied DC power. The power supply should have a nominal
output of +24VDC and be capable of supplying a minimum of 100mA for each CMCP700S Series Transmitter in the
system. A power-supply dedicated to the vibration monitoring system is recommended. It is also recommended
that connections between the power-supply and the monitors be made with twisted-shielded instrument cable.
The cable shield should float at the transmitter and connect to common at the power-supply / system common
end only.
Opening the Case
The CMCP700S Series Transmitter is configured by a series of switches. The switches can be accessed by removing
the PCB from the housing. The PCB can be removed by depressing the tabs located on the top and bottom behind
the terminal blocks. With the tabs depressed, the PCB can then be pulled out the front of the case.
Configuring the Transmitter
The CMCP700S Series Transmitter features 8 DIP switches which allow the transmitter to be configured for various
sensor inputs and measurement types. The images below show where the switches are located on the PCB and the
direction in which they should be moved to turn features on or off. Switches can be moved with a small flat head
screwdriver or with the tip of a pen. The following sections of this manual will cover the various settings and
features.

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Engineering Unit Selection
Engineering Units are selected based on the sensor used in conjunction with the transmitter and the desired
output. When using an IEPE accelerometer, choose either A-A, for a g’s Acceleration output, or A-V for an output in
terms of Velocity. When using a Velocity sensor, the transmitter must be in V-V mode for an output in Velocity
only. Place the PCB in front of you with the BNC facing up. To turn a switch off, move the lever to the left. To turn
the switch on, place it to the right. Only one of the Engineering Unit switches may turned on at one time.
A-A
V-V
A-V
Range
Sensor Input
ON
OFF
OFF
Acceleration Output (g’s)
IEPE Accelerometer
OFF
ON
OFF
Velocity Output (in/s or mm/s)
Piezo-Velocity Sensor
OFF
OFF
ON
Velocity Output (in/s or mm/s)
IEPE Accelerometer
Full Scale Range Selection
One of three Full-Scale range options can be selected by using switches R1, R2 or R3. The Full-Scale Range controls
the 4-20mA output scaling. To determine the Full-Scale range, choose the sensor type in the left-hand column and
match it to the range setting. The factory default setting is Range 2 (R2) and will provide a 1.00 in/s (25.4mm/s) full
scale output when used with a 100mV/g accelerometer. For example, when Range 2 (R2) is used with a 500mV/g
accelerometer, the full-scale output is 0.2 in/s (5.0mm/s).Velocity measurements can be scaled for either English
(in/s) or Metric (mm/s) units.
R-1
(Range 1)
R-2
(Range 2)
R-3
(Range 3)
Sensor Sensitivity
Acceleration
Velocity
Acceleration
Velocity
Acceleration
Velocity
Accelerometer
IOnputs
50mV/g
10g’s
1.0 in/s
(25.4mm/s)
20g’s
2.0 in/s
(50.8mm/s)
40g’s
4.0 in/s
(101mm/s)
100mV/g
5g’s
0.5 in/s
(12.7mm/s)
10g’s
1.0 in/s
(25.4mm/s)
20g’s
2.0 in/s
(50.8mm/s)
500mV/g
1g
0.10 in/s
(2.5mm/s)
2g’s
0.2 in/s
(5.0mm/s)
8g’s
0.8 in/s
(20mm/s)
Piezo-Velocity
100mV/in/s
(4mV/mm/s)
N/A
0.5 in/s
(12.7mm/s)
N/A
1.0 in/s
(25.4mm/s)
N/A
2.0 in/s
(50.8mm/s)
500mV/in/s
(20mV/mm/s)
N/A
0.10 in/s
(2.5mm/s)
N/A
0.2 in/s
(5.0mm/s)
N/A
0.8 in/s
(20mm/s)

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Low Pass Filter Selection
The CMCP700S-CVT’s bandwidth is controlled by switches LP1 and LP2. Both switches should always in either on or
off. The filters are based on ISO 2372 (10816) standards for machines which operate in the 600 to 12,000 RPM
Range.
LP1
LP2
Filter Range
ON
ON
10 to 1kHz (ISO Standard, Velocity)
OFF
OFF
10 to 10kHz (ISO Standard, Acceleration)
Temperature Output
The CMCP700S-CVT supports CMCP786T type (or compatible) dual output accelerometer and temperature sensors
with a sensitivity of 10mV/°C. The maximum input voltage range is 1.5VDC which corresponds to a 0 to 150°C Full-
Scale range on the 4-20mA output. The temperature signal is connected to terminal number 3. Power to
CMCP786T type sensors is provided through the accelerometer circuit.
Buffered Dynamic Output
A buffered, unfiltered version of the connected sensors AC signal is available on the front panel BNC connector.
Buffered outputs allow for live, online signal analysis and/or sensor testing. The sensors DC bias voltage is passed
through the buffered output to allow for proper operation of OK circuitry on portable data collectors as well as
allow for easy troubleshooting of the associated sensor. The BNC buffered output is tied in parallel to the buffered
output screw terminals which allow for hardwired connections to other test equipment. Buffered Outputs are
short circuit protected and have an output impedance less than of 50 ohms.
Note –when connecting a portable data collector or online system, the devices constant current power source
should be turned off. Failure to do so may result in a corrupt measurement.
Sensor OK/Fault Indicator
The CMCP700S-CVT features a local sensor status LED on the front panel. The LED is controlled by the transmitters
“OK” circuitry. When the transmitter is powered on, and the sensor is operating normally, the LED will be Green.
This indicates a good sensor signal. If the sensor’s bias voltage (BOV) is low or high, the LED will turn Red to
indicate a sensor fault.
4-20mA Outputs
The CMCP700S-CVT provides two analog 4-20mA current outputs, one for vibration and the other for temperature.
Both 4-20mA loops are active, meaning the transmitter source the voltage rom the transmitter. The 4-20mA
outputs should be connected to a passive input on a PLC, SCADA or BMS or DCS system. The total loop resistance
for each loop should not exceed 600 Ohms. If the temperature output loop is not used, do not connect any wires
to the terminals.
Wiring
The CMCP700S-CVT provides power for low-impedance type transducers via a nominal 4.4 mA constant current
source. This is generally enough current to allow operation with transducer cables extending up to about 200 ft.
However, it is strongly recommended that the transmitter be mounted as close as practical to the associated
transducer. This will prevent signal distortion associated with current drive limitations and will minimize
interference from external electro-magnetic noise sources (EMI). A well shielded, properly installed transducer
cable is necessary to obtain reliable operation. Twisted-shielded pair cables designed and pre-fitted with the
proper transducer connector and sold for this specific purpose are highly recommended. The cable shield should
be open at the transducer end and connected to common (VIB IN-) at the transmitter input only. The cable should
be routed as far away from other electrical circuits and ran in metal conduit where possible.

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Terminal Block Pin Assignments
Input/Output
Terminal Number
Labeling
Function
Sensor Input
1
VIB +
Signal Input / Sensor Power
2
VIB -
Sensor Input Common
3
TEMP IN
Temperature Input (10mV/°C)
Buffered Output
4
BUF VIB
Buffered Dynamic Output Signal
5
COM
Buffered Output Common
Analog Outputs
8
COM
Common
9
4-20 OUT TEMP
4-20mA Output - Temperature
12
4-20 OUT VIB
4-20mA Output - Vibration
DC Power
10
DC PWR +
+24VDC Input
11
DC PWR -
Common
Dimensions

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Troubleshooting
OK Light Off:
Check +24VDC power at bottom left terminals.
If +24VDC is good, replace transmitter.
OK Light Red:
Check to be sure sensor is wired properly to top left terminals.
OK Light will turn on WITHIN 3 seconds if sensor is OK.
If OK Light stays red, check sensor bias voltage or replace sensor.
Accelerometer DC Bias should be between 4.0 to 16.0 VDC
If sensor is good (DC bias or gap OK) replace transmitter.
No 4-20 mA Output:
Check to be sure OK light is green.
Disconnect field wiring and verify 4-20 mA directly with Digital Voltmeter.
If OK Light is green and there is no 4-20 mA output replace transmitter.
Erratic or Noisy Readings:
Check to be sure sensor shield is properly grounded.
Check for ground loops in system.
Verify sensor and cabling installation is in conduit and away from AC power or Variable Speed Drives.
If radios are causing interference, be sure to use metal enclosure and conduit.
Maintenance and Calibration
The CMCP700S Series Transmitters contain no user-serviceable parts. All transmitters are factory calibrated and
require no field adjustments or service. Transmitters are designed to provide years of continuous, trouble free
service under normal operating conditions. To obtain a return materials authorization number please contact
customer service at [email protected]m, or by telephone at [phone] or [phone]. When
contacting us for technical support please have the model number and serial number ready.
Technical Specifications
Mechanical
Mounting
35 mm DIN rail
Housing Dimensions (W / H / D)
4.94”x43.84”x0.69” (125.4x97.66x17.5mm)
Housing Material
Polycarbonate
Housing Color
Light Gray
Weight
3.0 Ounces (85g)
Environmental
Operating Temperature Range
0 to 70°C (-4 to 176°F)
Storage Temperature Range
-40 to 95°C (-40 to 203°F)
Humidity
0 –95% Non-Condensing
Degree of Protection
IP54
Terminal blocks
Connection Method
Screw Terminals
Conductor Gauge
16 to 24 AWG
Power input
Supply Voltage Range
23.5 to 30VDC (24VDC Nominal)
Current Consumption
100mA Max
Sensor input
Input Type
IEPE Accelerometer or Piezo-Velocity Sensor
Sensitivity (Accelerometers)
50, 100 or 500mV/g
Sensitivity (Piezo-Velocity)
100 or 500mV/in/s
Sensitivity (Temperature)
10mV/°C (CMCP700T Series Sensors)
Frequency Response (Velocity)
10 to 1kHz
Frequency Response (Acceleration)
10 to 10kHz
IEPE Power Source
Constant Current

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Revision History
Revision Release Date Updates
1.0 July 2, 2021 Manual Release
1.1 July 27, 2021 OK fault detection circuit