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ENGINEERED FOR PROTECTION LOGIC
Relay decisions between monitored conditions and plant protection actions
The A6740 relay architecture accepts channel clear, alert and danger states from the monitoring system. These states can be combined through configurable logic before being assigned to relay outputs. This makes the module suitable where alarm and trip decisions must be translated into deterministic external relay actions.
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| Manufacturer | Emerson EPRO | Model | A6740-12-N |
| Function | 16-Channel Output Relay Module | Relay Type | Mechanical relay, SPDT |
| Control Voltage | 13–32 VDC | Contact Load | 48 V, 1 A |
| Relay Outputs | Relay 1–16 | Input Types | Clear / Alert / Danger |
| Logic | Off / AND / OR / 2 out of 3 / AND AND OR | Logic Capacity | Up to 30 expressions per module |
| Time Delay | 0–30 seconds | Configuration | Password protected |
| Module Format | 3U, 2-slot plug-in module | Mounting Format | DIN 41494 PCB / Eurocard |
| Dimensions | 100 × 160 mm PCB format; 60 × 128.4 × 160 mm module envelope | Net Weight | Approx. 320 g |
| Operating Temperature | 0°C to 65°C | Storage / Transport | −40°C to 70°C |
| Humidity | 5–95%, non-condensing | Power Consumption | Maximum 6 W |
| EMC Resistance | EN50081-1 / EN50082-2 | Front Plate | IP20 according to DIN 40050 |
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01
Signal Selection
Channel clear, alert and danger states can be selected as inputs to relay logic.
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02
Boolean Decision Layer
Configured AND, OR, 2-out-of-3 and combined logic expressions determine when a relay action is initiated.
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03
Relay Action
Sixteen relay channels provide external switching outputs for alarm, trip and control circuits.
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PROTECTION ENVIRONMENT
Critical Rotating Machinery
The A6740 architecture is intended for machinery protection arrangements involving steam turbines, gas turbines, compressors and hydro turbo machinery. It operates as the relay decision layer within a larger monitoring and protection system.
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Where the relay layer adds practical value
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A6740
16-channel output relay module, 12 TE wide, designed for IMR 6000/10, IMR 6000/20 and IMR 6000/30 rack applications.
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A6740-10
16-channel output relay module in a 10 TE wide format for AMS 6500 systems.
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A6740-12 / A6740-12-N
The 16-channel relay architecture associated with the A6740 family, with relay logic, configurable output behavior and protection-system integration.
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3U
Module Height
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2
Rack Slots
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65°C
Maximum Operating Temperature
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6 W
Maximum Consumption
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REQUEST A6740-12-N SUPPORT
Confirm your required configuration before ordering
Send the part number, quantity, destination, required date and machine/system details for a faster quotation response.
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01 · Can A6740-12-N be used when a project requires 16 independently assigned relay actions?
Yes. The A6740 relay architecture provides Relay 1 through Relay 16 as separate output channels. Each relay can be assigned through the configured logic structure, allowing multiple protection conditions to be mapped to different external actions.
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02 · What should be checked when replacing an A6740-12-N in an existing protection rack?
The rack family and module width should be verified before replacement. The A6740 family includes different mechanical formats, including the 12 TE A6740 and 10 TE A6740-10 variants. The intended rack, slot arrangement and existing configuration should therefore be matched to the replacement module.
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03 · How does A6740-12-N handle a protection decision that depends on several machine conditions?
The module can receive channel clear, alert and danger states and apply Boolean logic before selecting an output relay. Supported logic includes AND, OR, 2-out-of-3 and combined AND/OR structures, with up to 30 logic expressions definable per module.
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04 · Does A6740-12-N provide flexibility for normally energized and normally non-energized protection schemes?
Yes. The relay specification allows normally energized or normally non-energized operation to be selected, while the relay contact arrangement is SPDT with selectable normally open or normally closed behavior. The actual setting should match the protection philosophy of the installed system.
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05 · What is the significance of the A6740-12-N time-delay range when replacing a relay module?
The relay module provides a configurable 0–30 second time-delay range. This allows the configured protection logic to account for the required delay before a relay action is generated, rather than forcing every output transition to occur without delay.
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A6740 SERIES
16 Relay Outputs
Configurable protection logic
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DELIVERY
3–5 Days
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WARRANTY
12 Months
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PACKAGING
Brand New
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SHIPPING
DHL / UPS / FedEx / EMS / TNT
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PAYMENT
T/T
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| 5466-316 | KC3010X1-BK1 | IMDSI14 | MVME147-012 | AB7000-C |
| 149369-01 | EPRO MMS6312 | F3221 | T8153C | F7553 |
| IS210HSLAH1A | CC-TCF901 | T8151C | F8641 | M1032-61633 |
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