Product Description

Overview
The 3500/15 127610-01 from Bently Nevada is a dual-purpose module set designed for the 3500 Series Machinery Protection System. The 3500/15 power supply module delivers reliable AC and DC power to the rack, supporting single or redundant configurations, while the 127610-01 External Termination Block (ETB) provides a secure interface for connecting field devices to relay modules. Together, they enable robust and organized turbine and machinery protection setups.

3500/15 Power Supply Module
This module ensures consistent and regulated power delivery to 3500 Series rack modules. Its flexible design allows for AC and DC input, accommodating a wide range of industrial power sources. It can operate independently or as part of a redundant power configuration to enhance system reliability.

Key Features

• Accepts AC input voltages from 85–264 V RMS (nominal 110–220 V)

• Supports input frequencies of 47–63 Hz

• Provides regulated output up to 100 W (some variants up to 500 W)

• Half-height form factor optimized for 3500 rack installation in the left-most slot

• Operates reliably from -30°C to +65°C (-22°F to 150°F), with 95% non-condensing humidity tolerance

• Storage temperature range: -40°C to +85°C (-40°F to 185°F)

127610-01 External Termination Block (ETB)
The 127610-01 serves as a rugged interface between the 3500 rack relay modules (3500/32M or 3500/34) and external field devices such as alarms, solenoids, and trip indicators. By relocating terminations outside the rack, it simplifies wiring, improves accessibility, and maintains signal integrity for critical safety circuits.

Key Features

• Screw-clamp terminals supporting 12–22 AWG wires

• DIN rail mounting for organized cabinet installation

• Multi-pin connector ensures secure connection to 3500 rack modules

• Supports low-resistance relay connections for “de-energize to trip” logic

• Clear channel labeling and accessible test points simplify maintenance and diagnostics

• Designed for harsh industrial environments with vibration and EMI resistance

Applications

• Turbine and machinery protection systems

• Safety-critical trip and alarm circuits

• High-density instrument racks in power generation and process control

• Retrofit and new installations requiring organized field wiring

Technical Specifications

FAQ

Q: What is the function of the 3500/15 power module?
A: It supplies regulated AC/DC power to the 3500 Series rack, supporting both single and redundant configurations for continuous system operation.

Q: How does the 127610-01 ETB simplify wiring?
A: By relocating terminations outside the rack to DIN rail-mounted screw terminals, it allows organized field connections and easy maintenance.

Q: Can these modules operate in harsh industrial environments?
A: Yes, both the 3500/15 and 127610-01 are rated for -30°C to +65°C operation with resistance to vibration and electromagnetic interference.

Q: Are these modules compatible with all 3500 Series relay modules?
A: The ETB supports 3500/32M, 3500/33, and 3500/34 relay modules, ensuring secure interfacing for trip and alarm circuits.

Q: Is redundancy supported?
A: Yes, the 3500/15 module can be deployed in a dual-module configuration with one unit acting as a backup.