Former EPRO Germany, AMS 6500 machinery health monitor rack；2‑slot 3U Euro‑card, API 670 compliant relay output module；sub‑variants A6740‑10 / A6740‑12Emerson。

Technical Specifications

• Product Model: A6740 (A6740‑10, A6740‑12)
• Brand: Emerson (EPRO)
• Warranty: One Year
• System Platform: AMS 6500 Classic Machinery Health Monitor
• Power Supply: Back‑plane 24 V DC; typical power consumption 7 W
• Relay Channels: 16 × SPDT (Form‑C) galvanic isolated relay outputs (Common / NO / NC)
• Contact Rating: 5 A @ 250 V AC；5 A @ 30 V DC
• Logic Resource: Max 60 alarm‑source inputs; up to 30 configurable boolean logic expressions; support AND / OR / 2‑out‑of‑3 voting; configurable time‑delay 0‑30 s; per‑relay Normally‑Energized / Normally‑De‑energized fail‑safe setting via software
• Response Time: Relay action ＜ 10 ms
• Operating Temperature: 0 °C ~ +65 °C; 5‑95 %RH non‑condensing; API 670 compliant
• Storage Temperature:‑40 °C ~ +85 °C
• Protection Class: IP20 module body; hot‑swap supported; occupies 2 slots (12 TE) in AMS 6500 rackemerson.kr
• Indicators: Power LED; 16‑channel individual relay status LED; front‑panel config service port
• Mechanical: 60 mm(W) × 128.4 mm(H) × 160 mm(D); weight approx. 450 g
• Field Wiring: External relay contacts connect to rear terminal assembly

Product Overview

Important notes:

1. No sensor measurement capability; pure relay output module, cannot work standalone.
2. Variants: A6740‑10 / A6740‑12 differ in rear terminal hardware; core logic identicalEmerson.
3. 

Application Scenarios

• Steam‑turbine / gas‑turbine TSI cabinet: Vibration, thrust, speed alarm & turbine trip hard‑contact outputs.
• Centrifugal‑compressor machinery‑protection system: Interlock signals to ESD and safety‑PLC.
• Power‑plant turbo‑generator monitoring racks.
• Oil‑gas rotating‑equipment safety‑monitoring.
• Retrofit & spare‑part replacement for existing AMS 6500 installations.