Bently 1701/05 | 1701 FieldMonitor™ Series Terminal Base – Specifications & Manual

Description

System Architecture & Operational Principle

Upstream Communication

Downstream Communication

Operational Advantages

• Distributed Architecture: Reduces installation costs by eliminating the need for long cable runs from transducers to a central rack.
• Field Mounting: Designed for harsh industrial environments (e.g., dust, moisture), with a rugged design that withstands vibration and temperature extremes.
• Modularity: Supports multiple 1701 FieldMonitor™ Series modules (e.g., transducer I/O, seismic input monitors), allowing flexible configuration for different machinery protection needs.

Core Technical Specifications

Attribute​	Specification​
Module Type​	Terminal Base (Field-Mounted)
Compatibility​	1701 FieldMonitor™ Series modules (e.g., 170180-XX-XX, 1701/15-01)
Input Capacity​	Up to 2 transducer inputs per module
Hazardous Area Support​	Compatible with 1701/06-01 Isolator Terminal Base (Division 2/Zone 2 for monitors)
Mounting​	Field-mounted (on machine guard or control cabinet)
Dimensions​	Approx. 241 mm × 146 mm × 64 mm (9.5 in × 5.75 in × 2.5 in) (from 1701 series standard)
Weight​	Approx. 0.68 kg (1.5 lbs) (from 1701 series standard)
Certifications​	CE, UL, CSA (from 1701 series standard)

BENTLY 1701/05

Customer Value & Operational Benefits

Field Engineer’s Notes (From the Trenches)

When installing the 1701/05, always verify the mounting surface—the terminal base must be mounted on a flat, rigid surface to prevent vibration-induced loosening. I once saw a site where a contractor mounted the base on a thin sheet metal panel, resulting in loose connections and intermittent signal loss. Use a drill and screws to secure the base to a solid surface (e.g., machine guard).

Another gotcha: check the terminal block connections—loose wires are a common cause of signal loss. Use a torque wrench to tighten the terminal screws to the manufacturer’s specification (typically 0.5–1.0 N·m) to ensure a secure connection.

If the terminal base’s “POWER” LED is off, check the power supply—the 1701/05 requires 24 VDC from a 1701/10-01 Power Supply. Use a multimeter to measure the voltage at the terminal block to confirm power is reaching the base.

Real-World Applications

• Power Generation: Steam Turbine Monitoring​
  A coal-fired power plant uses the 1701/05 to mount a 170180-XX-XX Transducer I/O Module on a steam turbine’s guard. The module receives signals from two proximity probes (measuring shaft vibration) and transmits data to a 1701/22-01 FieldMonitor Management Interface Module, which sends data to the plant’s DCS for monitoring.
• Oil & Gas: Centrifugal Compressor Protection​
  An offshore oil platform uses the 1701/05 to mount a 1701/25-01 Seismic Input Monitor on a centrifugal compressor’s casing. The monitor receives signals from two accelerometers (measuring casing vibration) and triggers an alarm if vibration exceeds the trip threshold, preventing damage to the compressor.

  

  Bently 1701/05

High-Frequency Troubleshooting FAQ

1. Select a Mounting Surface: Choose a flat, rigid surface (e.g., machine guard) that is protected from dust and moisture.
2. Mark the Mounting Holes: Use the terminal base’s template to mark the mounting holes on the surface.
3. Drill the Holes: Drill pilot holes for the screws (use a drill bit slightly smaller than the screw diameter).
4. Secure the Base: Use screws to attach the terminal base to the surface (tighten to the manufacturer’s specification).
5. Connect the Transducers: Wire the transducers to the terminal base’s input terminals (follow the wiring diagram in the 1701 FieldMonitor™ Series manual).

1. Power Supply: Ensure the 1701/10-01 Power Supply is turned on and supplying 24 VDC.
2. Terminal Block Connections: Verify that the power wires are securely connected to the terminal base’s power terminals.
3. Fuse: Check the terminal base’s internal fuse (if equipped) for continuity (replace if blown).

Commercial Availability & Pricing