Bently Nevada 135489-02(3500/42M) I/O Module.The Bently Nevada 135489-02 (3500/42M) is an I/O module used in Bently Nevada's 3500 Machinery Protection System. It is specifically designed for monitoring and protecting critical mechanical equipment in industrial applications, such as turbines, compressors, and pumps. It must be used in conjunction with the 3500/42M Front Card.
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Specification:
| Ordering Option | I/O Module P/N. | I/O Description | Transducer Type |
| 1 | 128229-01 | Prox/Seismic I/O Module with internal terminations | Seismoprobe Prox/Accel and Velomitor are supported but are not recommended. |
| 2 | 128240-01 | Prox/Seismic I/O Module with external terminations | Seismoprobe Prox/Accel and Velomitor are supported but are not recommended. |
| 4 | 135489-01 | I/O Module with internal Barriers, internal terminations, 4 x Prox/Accel | Prox/Accel on channels 1 through 4 |
| 5 | 135489-02 | I/O Module with internal barriers, internal terminations, 2 x Prox/Accel and 2 x Velomitor | Prox/Accel on channels 1 and 2 Velomitor on channels 3 and 4 |
| 6 | 135489-03 | I/O Module with internal barriers, internal terminations, 4 x Velomitor | Velomitor on channels 1 through 4 |
| 7 | 138708-01 | Shaft Absolute I/O Module with internal terminations | Prox/Accel or Velomitor or Seismorprobe |
| 8 | 138700-01 | Shaft Absolute I/O Modules with external terminations | Prox/Accel or Velomitor or Seismorprobe |
| 9 | 140471-01 | Prox/Velom I/O Module with internal terminations | Prox/Accel, Velomitor or HTVS |
| 10 | 140482-01 | Prox/Velom I/O Module with external terminations | Prox/Accel, Velomitor or HTVS |
Key Features
Four-channel architecture with mixed sensor support
Internal barriers for enhanced safety
Built-in terminations for simplified installation
Configurable channel pairing for flexible monitoring
Channel Configuration
The module operates with a unique channel arrangement where:
Channels 1 and 2: Support Prox/Accel functionality
Channels 3 and 4: Support Velomitor functionality
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