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- Emerson
- A6740
- 16-Channel Output Relay Module
- USA
- 60 mm × 128.4 mm × 160 mm
- 0.45kg
- Xiamen, China
- New & In Stock
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Product Introduction
The A6740 is a 16‑channel output relay module designed for critical rotating equipment protection in industrial plants. It is part of the AMS 6500 Machinery Health & Protection Series. As a plug‑in module (2‑slot width, 3U height) it delivers compact yet high‑density relay outputs and configurable logic for alarms, trips, and machine protection functions.
This module is engineered to process up to 60 input signals (e.g., “clear”, “alert”, “danger” states) from measurement modules, apply programmable logic (up to 30 expressions), and drive up to 16 independent relay outputs in response. It is typically used in systems that monitor turbines, compressors, pumps and other key rotating assets, providing alarm and shutdown capability compliant with machine‑protection standards.
Parameters
| Parameter | Specification |
|---|---|
| Model | A6740 |
| Brand | Emerson |
| Series | AMS 6500 Machinery Health & Protection Series |
| Type | 16‑Channel Output Relay Module |
| Input Channels | Up to 60 inputs (channel clear, alert, danger states) |
| Logic Networks | Up to 30 configurable logical expressions (AND, OR, 2‑out‑of‑3, etc) |
| Relay Output Channels | 16 independent SPDT (single‑pole double‑throw) relays |
| Contact Load / Voltage | Example: 48 V / 1 A (normally open/closed, etc) |
| Time Delay | 0‑30 seconds configurable per relay |
| Operating Temperature | 0 °C to +65 °C |
| Storage Temperature | –40 °C to +70 °C |
| Humidity | 5% to 95% non‑condensing |
| Shock | Approx. 98 m/s² (≈9.98 g peak) for 16 ms |
| Vibration | 0.15 mm (10‑55 Hz), 19.6 mm/s² (55‑150 Hz) |
| Dimensions (W × H × D) | Approx. 60 mm × 128.4 mm × 160 mm |
| Weight | Approx. 0.45 kg (≈450 g) |
| Power Consumption | Max 6 W |
| Mounting Type | Hot‑swappable plug‑in module designed for AMS 6500 rack systems |
Product Advantages
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High channel density and logic flexibility: With 16 relay outputs and 30 logic expressions, the module supports complex protection strategies.
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Compact form‑factor: The 2‑slot, 3U design uses less cabinet space compared to older 6U modules.
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Compliance and reliability: Designed for machinery‑protection environments, supports industrial shock & vibration standards.
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Hot‑swappable: Minimizes downtime for maintenance or module replacement.
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Detailed diagnostics and status: Self‑checking functions monitor power input, module health, internal temperature.
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Versatile configuration: Each relay can be configured for normally‑open/closed, time delay, etc., suiting diverse applications.
Applications
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Steam turbines, gas turbines, hydro‑turbines: triggering shutdown or isolation when vibration/displacement/temperature exceed thresholds.
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Large compressor and pump systems in oil & gas, petrochemical plants: monitoring critical rotating equipment and driving alarm/trip relays.
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Power‑generation systems: protecting generators, driven equipment and auxiliary machinery from fault conditions.
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Marine propulsion and offshore turbines: compact relay logic for challenging environments.
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Heavy manufacturing and process plants: integrating measurement modules with relay outputs for predictive maintenance and automatic protection.
Brand & Series
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Brand: Emerson
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Series: AMS 6500 Machinery Health & Protection Series
The AMS 6500 series is a modular platform of measurement cards (vibration, displacement, temperature), relay cards, communication modules, and racks, intended for the monitoring and protection of critical rotating assets. The A6740 is the relay‑output element within this ecosystem.
Related Models (Same Series / Functional Alternatives)
| Model | Type | Description | Key Specs |
|---|---|---|---|
| A6740‑10 | 16‑Channel Relay Module (10 TE wide) | Variation of A6740 with alternate slot width | ~320 g, 10 TE width |
| A6730 | 8‑Channel Relay Module | Lower channel count version for less demanding applications | 8 relays, similar form‑factor |
| A6500‑RC | Relay Output Card | 16‑channel protection relay card in AMS 6500 rack | 16 relays, ~0.32 kg |
| A6500‑UM | Universal Measurement Module | Dual‑channel measurement input card for vibration/displacement | ~0.20 kg |
| A6500‑CC | Communication Module | Network interface (Modbus/OPC) for AMS 6500 systems | Ethernet/RS‑485 support |
Popular Models from the Same Brand
| Model | Series | Type | Key Specs |
|---|---|---|---|
| KJ4001X1‑BA1 | DeltaV | Controller Module | 24 V DC supply, size ~150×185×70mm |
| VE4003S2B1 | DeltaV | Communication Module | 24 V DC, size ~130×185×65mm |
| VE4002S1T2B1 | Ovation | Digital Output Module | 24 V DC, size ~130×185×65mm |
| KJ2003X1‑BB1 | DeltaV | Analog Output Module | 0‑10 V / 4‑20 mA, size ~130×185×65mm |
| VE4005S2B1 | Ovation | Analog Input Module | 0‑20 mA / 4‑20 mA, size ~130×185×65mm |
FAQ (Frequently Asked Questions)
Q1: What is the main purpose of the A6740 module?
A1: It provides 16 relay outputs for alarms or trip signals in a machine‑protection system, triggered by measured inputs and configurable logic.
Q2: How many input signals can the A6740 accept?
A2: Up to about 60 input signals of “channel clear/alert/danger” states from measurement modules.
Q3: How many logic expressions can be configured?
A3: Up to 30 different logical expressions (AND, OR, 2‑out‑of‑3, etc) to define when relays fire.
Q4: What is the operating temperature range?
A4: 0 °C to +65 °C for normal use, and storage down to –40 °C to +70 °C.
Q5: What is the module’s weight and size?
A5: Approximately 0.45 kg in weight; dimensions roughly 60 mm × 128.4 mm × 160 mm.
Q6: Is the module hot‑swappable?
A6: Yes — the module is designed for hot‑swapping in compatible rack systems, reducing downtime.
Q7: What standards or compliances does the module meet?
A7: It is designed for industrial machinery‑protection applications, complying with relevant shock, vibration, EMC and API 670‑type requirements.
Q8: What kind of contact load do the relays support?
A8: Example ratings include 48 V DC at 1 A for contact loads; each relay can be configured normally‑open or normally‑closed.
Q9: Where is the module typically used?
A9: In protection systems on turbines, compressors, pumps, generators and other rotating assets where alarms or trips must be triggered reliably.
Q10: What mounting format is used for the A6740?
A10: It is a 3U height card in a plug‑in rack system (2‑slot width) designed for AMS 6500 chassis environments.
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