Bently Nevada 133819-01 3500/60 RTD/TC Non-Isolated I/O Module

Bently Nevada 133819-01 RTD/TC non-isolated I/O module for the 3500/60 temperature monitor

The Bently Nevada 133819-01 is the RTD/thermocouple non-isolated I/O module with internal terminations for the 3500/60 Temperature Monitor. The manufacturer’s spares list shows it under the 3500/60 (without recorder outputs). Its twin for the recorder-output monitor is 133819-02, which belongs to the 3500/61. The module takes up one full-height rear slot, mates with the six-channel temperature monitor in the front slot, and lets each channel be set up for either an RTD or a thermocouple.

In the 3500/60-AA-BB ordering code, 133819-01 is the A01 option, “RTD/TC Non-isolated I/O Module Internal Terminations”. Seven Star LLC supplies 133819-01 in Oman and the GCC as an independent supplier in Muscat.

Decoding 133819-01 in the 3500/60 family

The only difference between the 3500/60 and 3500/61 is the six recorder outputs of the 3500/61. Because the I/O module carries the recorder wiring, the -01 and -02 variants of the same I/O are not interchangeable, so make sure the suffix matches the monitor in the rack.

133819-01 technical specifications

Temperature ranges depend on the sensor type connected, and the full-scale range of each channel is set in the 3500 software. The datasheet notes that Platinum RTDs with 0.00385 alpha are the worldwide industrial standard and are recommended for all applications.

How the RTD/TC channel is measured

For RTD inputs the module sources a small current (about 925 µA) through the sensing element and measures the resulting voltage, which is converted to temperature with the curve of the selected sensor type. For thermocouples the module amplifies the millivolt signal and adds a cold-junction temperature taken from an on-board sensor. Both types are set per channel in the Rack Configuration Software, so a monitor can supervise bearing metal RTDs and a thermocouple on the same rack.

Where 133819-01 fits and how it is used

The non-isolated module is the usual choice for bearing metal, thrust pad and winding RTDs and for thermocouples that are insulated from ground. If the thermocouple junctions are grounded or share a ground with other equipment, the isolated TC types (133835-01 and 133843-01) offer 250 Vdc of channel-to-channel isolation and 500 Vdc of system isolation as protection in fault scenarios.

• Main module: 163179-01, the 3500/60 temperature monitor without recorders. The 3500/61 monitor with recorders is 163179-02.
• External termination alternatives: block 133908-01 (terminal strip) or 133916-01 (Euro style) with cable 134544-AAAA-BB, used with the external I/O module 133827-01.
• Connector headers: 00580442 (9-position), 00580443 (12-position green) and 00580444 (15-position) for internal termination.
• User guide: 134542.

Selection checklist before ordering 133819-01

• Confirm that the rack monitor is a 3500/60. A 3500/61 needs 133819-02.
• Confirm the termination style. If the wiring is on a cabinet termination block, you need an external I/O module.
• Confirm that the sensors are RTD or ungrounded thermocouples; grounded thermocouple junctions need the isolated I/O.
• Check whether internal barriers are in use. The barrier I/O (136711-01) has a narrower operating temperature range, 0 to +65 °C.
• Record the module revision and the sensor types so the configuration can be reloaded.

Installation, commissioning and maintenance of 133819-01

Use 3-wire or 4-wire RTD wiring with shielded cable, ground the shield at one end only according to the rack wiring diagrams, and keep the thermocouple extension cable of the correct type from end to end. After fitting the module, load the stored configuration or reconfigure the channels and verify each reading against a calibrator or a decade box. Compare a cold-junction check with a known room temperature when thermocouples are used.

Open-circuit sensors show as a Not OK channel, which is a quick way to find broken RTD leads. Because the I/O module is the part directly exposed to field cabling, keeping a spare 133819-01 on the shelf is a practical way to protect long-lead turbine and compressor outages.

Typical applications in Oman and the GCC

Temperature monitors protect the bearings and windings of gas turbines, generators, large motors, centrifugal compressors and boiler feed pumps in oil and gas, power and desalination plants across Oman and the GCC. With high ambient temperatures, accurate thermal monitoring of journal and thrust bearings and of motor stator windings is an early warning of lubrication or cooling problems. Terminal checks and shield integrity matter in hot, dusty junction boxes.

Information to send with your RFQ for 133819-01

• Part number 133819-01 and quantity.
• Module label photo, including revision, and confirmation of the monitor part number (3500/60 or 3500/61).
• Sensor types (RTD or TC) and termination style in use.
• Delivery country and required date.

Related Bently Nevada products: Bently Nevada 125680-01 3500/40M Proximitor I/O Module, Bently Nevada 128240-01 3500/42M Prox/Seismic I/O Module, Bently Nevada 149369-01 3500/25 Enhanced Keyphasor Module, Bently Nevada 3500/50 Tachometer Module, Bently Nevada 3500/20 Rack Interface Module and Bently Nevada 3500/50M Tachometer Module.

Documents and quotation

The 3500/60 and 3500/61 temperature monitor datasheet is attached on this page and supplies the figures above.

Send the part number 133819-01 with your rack details and Seven Star LLC will confirm availability and lead time in Oman and the GCC.