Product Details
Configured for relay contact switching and interlock execution in machinery protection systems, the Emerson EPRO A6740/12 (A6740/12 Output Relay Module) provides direct physical/electrical execution. It converts system logic commands into discrete contact state outputs across MMS6000 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | A6740/12 |
| Brand | Emerson EPRO |
| Base Model | A6740/12 |
| Origin | Germany |
| Weight | 320 g net (450 g packaged) |
| Dimensions | 160 mm L x 60 mm W x 128.4 mm H |
| Operating Temp | 0 to 65 deg C (32 to 149 deg F) |
| Power Consumption | Rack backplane powered |
| Output Type | 16-Channel Relay |
| Mounting Format | DIN 41494 Eurocard (3HE/12TE) |
| Storage Temp | -40 to 70 deg C |
| Humidity Tolerance | 5% to 95% non-condensing |
| Vibration Proof | 0.15 mm at 10-55 Hz, 19.6 m/s2 at 55-150 Hz (IEC 68-2-6) |
| Shock Resistance | 98 m/s2 for 16 ms pulses (IEC 68-2-29) |
4-20 mA HART Loop Protocol and Channel-to-Channel Isolation
The A6740/12 relay module features 16 discrete relay channels engineered with channel-to-channel isolation to prevent electrical interference between external switching circuits. This galvanic separation ensures that contact closures or field ground faults do not couple into adjacent control loops or 4-20 mA HART DCS instrumentation interfaces connected within the main machinery monitoring system.
Frequently Asked Questions
Q: What mounting standards and rack formats are compatible with the A6740/12 module?
A: The module conforms to the DIN 41494 Eurocard standard in a 3HE/12TE form factor, fitting standard Eurocard chassis and Emerson EPRO MMS6000 systems.
Q: What environmental shock and vibration resistance limits apply to the module?
A: The module complies with IEC 68-2-6 for vibration (0.15 mm at 10-55 Hz, 19.6 m/s2 at 55-150 Hz) and IEC 68-2-29 for shock resistance (98 m/s2 for 16 ms pulses).
Q: What wiring termination method is used for field contact connections?
A: Field connections utilize spring-clip terminal connectors to maintain wire contact retention under vibration without requiring screwed terminal maintenance.
Field Installation Guidelines
- Power down the designated rack slot before inserting the Eurocard module into the MMS6000 chassis.
- Align the module card edges with the 3HE/12TE rack guide slots and push firmly until rear connectors engage the backplane.
- Fasten the front panel retention screws to secure the unit against mechanical vibration and ensure frame grounding.
- Connect field output conductors using the spring-clip terminal connectors, verifying stripping lengths to prevent exposed leads.
- Ensure field relay contact load voltages and currents do not exceed maximum specified ratings before energizing loop power.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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