Bently Nevada 3500/77M Data sheet

3500/77M Recip Cylinder Pressure Monitor
Datasheet
Bently Nevada Machinery Condition Monitoring

Description

The 3500/77M Recip Cylinder Pressure Monitor is a 4-channel monitor that accepts input from Bently Nevada approved pressure transducers, conditions the signal to make various pressure measurements for reciprocating compressors, and compares the conditioned signals with user-programmable alarms.
The primary purpose of the 3500/77M monitor is to provide:
monitored parameters against configured alarm setpoints to drive alarms.
l Essential machine information for operations and
maintenance personnel.
Depending on configuration, each channel typically conditions its input signal to provide various parameters called measured variables. Users can configure Alert setpoints for each active measured variable and Danger setpoints for any two of the active measured variables.
147485 Rev. R
Each channel of the 3500/77M will provide eight measured variable values that relate to cylinder pressure operation. The five values that relate to a single chamber are as follows:
l Discharge Pressure l Suction Pressure l Maximum Pressure l Minimum Pressure l Compression Ratio
3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R
Three measured variables combine one or more channel values with configured mechanical parameters to compute their value:
l Peak Rod Compression l Peak Rod Tension l Degree of Rod Reversal
For more information on the 3500/77M Recip Cylinder Pressure Monitor, refer to the User Guide (document 146282).
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3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R

Specifications

Inputs
Accepts 1 to 4 channels of Bently
Signal
Scale Factor
range† 95,000 mV/psi for 100 psia range† 38,000 mV/psi for 250 psia range† 19,000 mV/psi for 500 psia range† 9,500 mV/psi for 1000 psia range† 3,800 mV/psi for 2500 psia range† 1,900 mV/psi for 5000 psia range† 950 mV/psi for 10,000 psia
†All pressure transducers will be supplied with scale factor specifications that include pressure/voltage values at two points. The above data assumes +0.5 Vdc at 0 psia and +10.0 Vdc at the full-range psia value.
Nevada approved positive voltage 3rd-party pressure transducers (psia)
Power Consumption
7.8 watts with transducer supplies at full load.
Outputs
Front Panel LEDs
OK LED
TX/RX LED
Bypass LED
Buffered Transducer Outputs
The Buffered Transducer Outputs on monitors using the Cylinder Pressure I/O module will be inverted and offset by -
2.265 Vdc.
Output Impedance 550 Ω
Transducer Power Supply
Indicates when the 3500/77M is operating properly.
Indicates when the 3500/77M is communicating with other modules in the 3500 rack.
Indicates when the 3500/77M is in Bypass Mode.
The front of each monitor has one coaxial connector for each channel. Each connector is short-circuit protected.
+23.0 ± 0.8 Vdc with 24.5 ma current limiting on each channel.
Signal Conditioning
Frequency Response
Pressure Accuracy
0 to 5.5 kHz on all configured pressure channels
Within ± 0.5% of pressure transducer full-range (9.5 volts: From +0.5 to +10.0 volts) @ +25°C (77º F)
Within ± 1.0% of pressure transducer full-range (9.5 volts: From +0.5 to +10.0 volts) over –30 °C to +65 °C (­22 ºF to 150 ºF)
Measured Variables
Discharge Pressure, Suction Pressure,
Cylinder Pressure
Input Impedance
Internal/ External Termination Cylinder Pressure I/O
Maximum Pressure, Minimum Pressure, Compression Ratio, Peak Rod Compression, Peak Rod Tension, Degree of Rod Reversal
50 kΩ
Environmental Limits
Operating Temperature
When used with Internal/External Termination Cylinder Pressure I/O Module:
Storage Temperature
Humidity 95%, non-condensing
-30 °C to +65 °C
(-22 °F to +150 °F)
-40 °C to +85 °C
(-40 °F to +185 °F)
Physical
Monitor Module
Dimensions (Height x Width x Depth)
Weight 0.91 kg (2.0 lb.)
I/O Modules
Dimensions (Height x Width x Depth)
241.3 mm x 24.4 mm x 241.8 mm
(9.50 in x 0.96 in x 9.52 in)
241.3 mm x 24.4 mm x 99.1 mm
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3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R
(9.50 in x 0.96 in x 3.90 in)
Weight 0.20 kg (0.44 lb.)
Rack Space Requirements
Monitor Module 1 full-height front slot I/O Modules 1 full-height rear slot

Compliance and Certifications

FCC
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
l This device may not cause harmful
interference.
l This device must accept any
interference received, including interference that may cause undesired operation.
EMC
European Community Directive:
EMC Directive 2014/30/EU
Standards:
EN 61000-6-2 Immunity for
Industrial Environments
EN 61000-6-4 Emissions for
Industrial Environments
Electrical Safety
European Community Directive:
LV Directive 2014/35/EU
Standards:
EN 61010-1
RoHS
European Community Directive:
RoHS Directive 2011/65/EU
Maritime
ABS - Marine and Offshore Applications
DNV GL Rules for Classification – Ships, Offshore Units, and High Speed and Light Craft
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3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R

Hazardous Area Approvals

For the detailed listing of country and product specific approvals, refer to the Approvals Quick Reference Guide (108M1756) available from
Bently.com.
CSA/NRTL/C
Class I, Zone 2: AEx/Ex nA nC ic IIC T4 Gc; Class I, Zone 2: AEx/Ex ec nC ic IIC T4 Gc; Class I, Division 2, Groups A, B, C, and D;  T4 @ Ta= -20˚C to +65˚C (-4˚F to +149˚F) When installed per drawing 149243 or 149244.
ATEX/IECEx
II 3 G
Ex nA nC ic IIC T4 Gc Ex ec nC ic IIC T4/T5 Gc  T4 @ Ta= -20˚C to +65˚C (-4˚F to +149˚F) When installed per drawing 149243 or 149244. 
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3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R
External Termination Blocks

Ordering Considerations

General
The 3500/77M Module requires the following (or later) firmware and software revisions:
l 3500/77M Module Firmware Revision L l 3500/01 Software – Version 3.00 l 3500/02 Software – Version 2.30 l 3500/03 Software – Version 1.30
External Termination Blocks cannot be used with Internal Termination I/O Modules.
When ordering I/O Modules with External Terminations, the External Termination Blocks and Cables must be ordered separately.
The lower limit for machine speed is 60 RPMin the standard product. For machine speeds down to 30 RPM, modification 135M8200-01 is required.

Ordering Information

For the detailed listing of country and product specific approvals, refer to the Approvals Quick Reference Guide (108M1756) available from
Bently.com.
Part
Number
125808-10
128015-10
Cylinder Pressure External Termination Block (Euro Style connectors).
Cylinder Pressure External Termination Block (Terminal Strip connectors).
Description

Cable

3500 Transducer Signal to External Termination Block Cable
129525-AAAA-BB
A: Cable Length 0 0 0 5 5 feet (1.5 metres) 0 0 0 7 7 feet (2.1 metres) 0 0 1 0 10 feet (3 metres) 0 0 2 5 25 feet (7.5 metres) 0 0 5 0 50 feet (15 metres) 0 1 0 0 100 feet (30.5 metres) B: Assembly Instructions 0 1 Not Assembled 0 2 Assembled
Cylinder Pressure Monitor
3500/77M-AA-BB
A: I/O Module Type
0 3
0 4
B: Agency Approval Option 0 0 None 0 1 CSA/NRTL/C 0 2 ATEX/IECEx/CSA
Cylinder Pressure I/O with Internal Terminations.
Cylinder Pressure I/O with External Terminations
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3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R
Spares and Accessories
Part Number Description
176449-07 3500/77M Cylinder Pressure Monitor.
Cylinder Pressure I/O Module with
143729-01
143737-01
00580434
00580441
146973-01 Recip Multi-Event Wheel Kit 145732-01 Recip Multi-Event Wheel 146622-01 Recip Multi-Event Wheel Stud
165855-XX
283615
115M1270-XX Custom Band Type, dual track 114M1640-XX Custom Band Type, single track
111M8664-01
Internal Terminations for Bently Approved Third Party Pressure Transducers
Cylinder Pressure I/O Module with External Terminations for Bently Approved Third Party Pressure Transducers
Internal I/O Module connector header, Euro Style, 8 pin. Used on I/O modules 143729-01.
Internal I/O Module connector header, Euro Style, 3 pin. Used on I/O modules 143729-01.
Recip Cylinder Pressure Transducer (See 165855 data sheet)
MTL 7796+ External Barrier (See Field Wiring Dwg 147729)(022000812 MTL 796(+) External Barrier is discontinued)
Installation manual for the band type
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3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R

Graphs and Figures

1. Main 3500/77M Cylinder Pressure Monitor Module (front
view). 2. Status LEDs. 3. Buffered transducer outputs. These provide an unfiltered
output for each of the four transducers. All are short circuit
protected. 4. I/O module rear views. 5. Cylinder Pressure I/O Module, Internal Termination. 6. Cylinder Pressure I/O Module, External Termination.
Figure 1: 3500/77M Front and Rear View
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3500/77M Recip Cylinder Pressure Monitor Datasheet 147485 Rev. R
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Baker Hughes provides this information on an “as is” basis for general information purposes. Baker Hughes does not make any representation as to the accuracy or completeness of the information and makes no warranties of any kind, specific, implied or oral, to the fullest extent permissible by law, including those of merchantability and fitness for a particular purpose or use. Baker Hughes hereby disclaims any and all liability for any direct, indirect, consequential or special damages, claims for lost profits, or third party claims arising from the use of the information, whether a claim is asserted in contract, tort, or otherwise. Baker Hughes reserves the right to make changes in specifications and features shown herein, or discontinue the product described at any time without notice or obligation. Contact your Baker Hughes representative for the most current information.
The information contained in this document is the property of BakerHughes and its affiliates; and is subject to change without prior notice. It is being supplied as a service to our customers and may not be altered or its content repackaged without the express written consent of Baker Hughes. This product or associated products may be covered by one or more patents. See Bently.com/legal.
1631 Bently Parkway South, Minden, Nevada USA 89423
Phone: 1.775.782.3611 or 1.800.227.5514 (US only)
Bently.com
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