Description

Product Overview

The 3500/32 125712-01 is a full‑height relay output module for the Bently Nevada 3500 turbine supervisory and machinery protection system. It provides four independent SPDT relay outputs, which can be programmed with flexible AND / OR alarm drive logic using rack configuration software. Each relay may be assigned to alert, danger or module OK status from any monitor channel inside the rack, supporting trip hardwiring to ESD systems, solenoid valves, alarm annunciators and DCS status inputs. Relay channels are selectable for normally energized or normally de‑energized operation, and each relay includes built‑in arc suppression. This module is widely used on steam turbines, centrifugal compressors, pumps and other critical rotating assets in power, oil & gas and petrochemical plants.

Technical Specifications

• Brand: Bently Nevada (Baker Hughes)
• Model: 3500/32 125712-01
• Warranty: One Year
• Condition: 100% New & Original
• Input/Output: 4 isolated SPDT (Form C) relay channels; contact rating 5 A @ 250 VAC / 30 VDC resistive
• Operating Temp: 0°C to +65°C
• Communication: TriBus backplane communication with rack monitors and TDI
• Power Consumption: 6 W typical, powered from 3500 rack backplane
• Relay Setting: Per‑channel selectable: normally energized / normally de‑energized, latching option
• Logic: Custom AND / OR voting logic, driven by any rack alert / danger / OK points
• Isolation: 1500 Vrms coil‑to‑contact isolation
• Arc Suppression: 250 Vrms arc suppressor fitted as standard
• Contact Life: 100,000 cycles at rated load
• Indicators: Module OK, TX/RX, individual channel alarm LEDs
• Form Factor: Full‑height 3500 rack slot
• Compliance: API 670, CE, UL/cUL Class I Div.2
• Weight: Approx. 0.7 kg