Bently Nevada 177230 Specifications

177230 Seismic Transmitter

Datasheet

Bently Nevada Machinery Condition Monitoring

Description

The 177230 Seismic Transmitter is a simple, loop-powered
device that can be quickly and easily installed. It can be
integrated into your programmable logic controller (PLC)or
controls system linked to a plant asset condition monitoring
solution. Its simple design reduces training, maintenance,
and service costs. The transducer helps you better manage
downtime, optimize maintenance planning, and avoid
unforeseen catastrophic failures of machinery assets.

The 177230 Seismic Transmitter incorporates robust CM
design for reliability and implements an industry-standard 4
to 20 mA loop-powered transmitter.

Easily Installed and Integrated

l Interfaces with PLCs and control systems (including

DCS and SCADA)

l Requires only a short learning curve for operations and

maintenance –through a familiar interface similar to

that for connecting other PLC or control system inputs
l Requires no field configuration or adjustments
l Needs few additional parts for a complete system
l Includes technical support for customers on how to

monitor their equipment
l Includes self-test
l Incorporates protected interface
l Supports a variety of interface cables

177232 Rev. O

Data Quality

l Provides accurate and repeatable data
l Uses simple data format
l Provides raw vibration signal for verification and

analysis

177230 Seismic Transmitter
Datasheet 177232 Rev. O

EHS Compliant

l Implements safe and ergonomic design
l Supports access to hazardous areas

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177230 Seismic Transmitter
Datasheet 177232 Rev. O

Referenced

Specifications

to Pin B

Electrical

Sensitivity –
Main Loop
(Signal
One)

Output
Format, Pin
A
Referenced
to Pin B

Excitation
Voltage

This product is for use with PLCs, DCS
and SCADA systems that have internal
power supplies which are typically
current limited in the range of 30 mA to
35 mA.

Settling
Time

Connector
Wiring
Convention

Frequency
Response

Sensitivity –
Dynamic
Signal
(Signal
Two)

Output
Format, Pin
C

n 0.0 to 12.7 mm/s (0 to 0.5 in/s)
n 0.0 to 25.4 mm/s (0 to 1.0 in/s)
n 0.0 to 50.8 mm/s (0 to 2.0 in/s)

± 10% FS, broadband rms (root
mean square)
[4 ± 0.3 mA equals 0.0 mm/s
and 20 ± 2 mA equals 25.4
mm/s]

4 to 20 mA current loop Velocity
vibration

12 to 30 Vdc (current limited to
40 mA)

Less than 15 seconds within 2%
of final value

n Pin A: 4-20 mA Positive Loop
n Pin B: 4-20 mA Negative Loop

and common for Dynamic
Signal

n Pin C:Dynamic Signal in

voltage, unbuffered

10 Hz to 1 kHz (600 cpm to 60
kcpm) ± 10%

10.2 mV/m/s2 (100 mV/g) ± 20%

Voltage, Acceleration vibration

The Dynamic Signal Negative (Pin B)
requires isolation from any grounding.
If this terminal is grounded, the 4-20
mA loop will short, resulting in no
output.

Frequency
Response

Linearity ±1%

Output Bias
Referenced
to Pin B

Full Scale
Range

Velocity
Range (see
Option AA
and BB)

Mounted
Resonant
Frequency

Transverse
Sensitivity

Sensing
Element
Type

2.5 Hz to 10 kHz (150 cpm to 600
kcpm) ± 10%

2.5 V ± 0.1 V

147 m/s2 ( 15 g’s) peak

n 0 – 12.7 mm/s (0 – 0.5 in/s)
n 0 – 25.4 mm/s (0 – 1.0 in/s)
n 0 – 50.8 mm/s (0 – 2.0 in/s)

Greater than 12 kHz

Less than 5% of sensitivity

Ceramic / Shear

Environmental Limits

Operating
Temperature
Range

Electrical
Isolation

Isolation
Breakdown
Voltage

Shock
Survivability

-40 °C to +85 °C
(-40 °F to +185 °F)

Greater than 108 ohms

600 Vrms with less than 1 mA
leakage current

9.810 m/s2 (1.000 g peak),
maximum drop test

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