Overview
The A6500-RC System Relay Card is a 16-channel output relay module designed for use with the AMS 6500 ATG machinery protection system. It receives selected channel status signals, including Clear, Alert, and Alarm, and uses configurable Boolean logic and time delays to control relay outputs. The module supports machinery protection logic for monitoring applications involving steam turbines, gas turbines, compressors, and hydro machinery.
Relay Logic and Output Control
The A6500-RC allows users to select channel status signals as inputs and combine them using Boolean logic. Configurable time delays help determine when the selected conditions activate an output relay. Configuration software provides graphical logic displays to support the setup and review of relay logic.
The 16 outputs use SPDT (single-pole, double-throw) contacts. These relay outputs can interface with external circuits according to the specified voltage and load ratings. The stated switching times apply to the relay contacts and exclude the time required for logic processing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | A6500-RC |
| Brand | Emerson |
| Product Type | System Relay Card |
| Module Function | 16-channel relay output |
| Digital Inputs | 66 |
| Digital Input Logic Low | 0-3 V, not active |
| Digital Input Logic High | 13-32 V, active |
| Open Input State | Detected as not active |
| Digital Input Rated Current | 1 mA |
| Digital Input Rated Power | 24 mW |
| Relay Outputs | 16 |
| Relay Contact Type | SPDT |
| Maximum Voltage Capacity | 32 V DC / 48 V AC |
| AC1 Output Load | 48 V / 2 A |
| DC1 Output Load | 32 V / 2 A |
| DC-13 Output Load | 24 V / 1 A |
| AC-15 Output Load | 24 V / 2 A |
| Turn-On / Turn-Off Time | 10 ms, NO contact; 13 ms, NC contact |
| Relay Rated Current | 2 A |
| Relay Rated Power | 96 W |
| Maximum Power Consumption | 6 W |
| Configuration Security | Password protected |
| Protection Class | IP20, IEC 60529 |
| Conformal Coating | HumiSeal 1B31 EPA |
| Coating Standards | IPC-CC-830B and IPC-A-610 |
| Airborne Contaminant Resistance | ISA-S71.04-1985, Class G3 |
| Operating Temperature, Forced Cooling | -20 to +70 deg C (-4 to 158 deg F) |
| Operating Temperature, Without Forced Cooling | -20 to +55 deg C (-4 to 131 deg F) |
| Storage and Transport Temperature | -40 to +85 deg C (-40 to +185 deg F) |
Electrical and Environmental Considerations
The digital inputs distinguish inactive signals at 0-3 V from active signals at 13-32 V. The 4 V to 12 V interval is not assigned a logic state in the supplied specifications, so it should not be treated as a defined operating range without further documentation.
The relay contact ratings vary with the specified load category. Verify the applicable AC1, DC1, DC-13, or AC-15 rating against the connected circuit before selecting the module for a particular switching duty.
The maximum permitted operating temperature depends on cooling conditions. Forced cooling allows operation up to +70 deg C, while operation without forced cooling is specified up to +55 deg C. The module has an IP20 protection rating and a conformal coating intended for resistance to airborne contaminants.
Configuration and System Application
The A6500-RC works with the AMS 6500 ATG system to implement configurable relay logic based on machinery monitor status signals. Users can select Clear, Alert, or Alarm conditions, apply Boolean logic and time delays, and assign the resulting logic to an output relay. Configuration access is password protected.
Frequently Asked Questions
Q: How many relay outputs does the A6500-RC provide?
A: It provides 16 SPDT relay outputs. Each output must operate within the applicable voltage and load rating for the connected circuit.
Q: Can the A6500-RC respond to Alarm and Alert signals from machinery monitors?
A: Yes. Clear, Alert, or Alarm status signals can be selected as logic inputs. Boolean logic and time delays can then determine the conditions under which an output relay operates.
Q: What operating temperature should be considered when selecting this module?
A: The specified operating range is -20 to +70 deg C with forced cooling and -20 to +55 deg C without forced cooling. The installation’s cooling conditions must therefore be considered during selection.
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