Yokogawa RS71*C DCS Module
The Yokogawa RS71*C, also cataloged as the RS71*C DCS Module, operates as a dedicated hardware component for field signal processing and real-time data communication within Yokogawa DCS automation platforms. Operating on a 24 VDC power supply, the unit interfaces up to 128 configurable I/O points—supporting analog, digital, pulse, and serial communication paths—driven by onboard processing memory (512 KB to 4 MB RAM, 256 KB to 2 MB Flash) across operating temperatures from -40 to 70 deg C.
Suffix Breakdown & Model Matrix
| Code Segment | Position / Option | Functional Specification |
|---|---|---|
| RS71 | Base Model | Multi-Function Communication & Control Card |
| ***** | Option / Coating Suffix | Functional option / Conformal coating specification |
| C | Generation / Version | Hardware revision designator |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RS71*C |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.5 kg (1.10 lbs) |
| Dimensions | 130 mm x 100 mm x 50 mm |
| Operating Temp | -40 to 70 deg C |
| Power Consumption | Operating Voltage: 24 VDC |
| Memory Capacity | 512 KB to 4 MB RAM / 256 KB to 2 MB Flash |
| I/O Point Density | Supports up to 128 Configurable Points |
| Operating Humidity | 5% to 95% RH (non-condensing) |
| Hazardous Certifications | ATEX, IECEx, FM, CSA |
| Programming Languages | Ladder Logic, Structured Text, Function Block Diagram |
| Equipment Category | Distributed Control System (DCS) Module |
Field Signal Routing & DCS Loop Integration
The RS71*C executes deterministic data transfer between field instrument networks and central control processors. Built-in signal conditioning channels maintain full pass-through support for 4-20 mA HART loop protocol telemetry, allowing dynamic digital variables to superimpose onto analog control lines without signal attenuation. Galvanic channel-to-channel isolation prevents ground loop interference and protects central bus architecture from common-mode voltage spikes in hazardous area installations.
Frequently Asked Questions
Q: What purpose does the asterisk () suffix serve in the RS71C model code?
A: The asterisk represents specific factory-configured hardware options, such as conformal coating for corrosive environments or specialized memory sizing options.
Q: Is the RS71*C rated for installation in hazardous industrial atmospheres?
A: Yes, the module carries ATEX, IECEx, FM, and CSA hazardous location certifications, allowing installation in designated hazardous zones when installed per regional electrical codes.
Field Installation Guidelines
- Power Isolation: Fully isolate and lock out the 24 VDC primary power supply before inserting, removing, or wiring the RS71*C module.
- Backplane Seating: Align the board edges with the chassis mounting guide rails and push firmly until the locking mechanisms seat fully into the backplane connector.
- Hazardous Location Compliance: Verify that all field wiring meets ATEX/IECEx standards for non-incendive or intrinsically safe loops, ensuring proper cable gland sealing.
- Shield Wire Grounding: Ground all instrument signal cable shields at a single functional earth point on the cabinet bus bar to eliminate ground loop currents.
- Thermal Clearance: Maintain minimum required convection airflow spacing around the module housing to prevent heat buildup up to the 70 deg C thermal limit.
Yokogawa RS71*C DCS Module
Yokogawa RS71*C DCS Module
The Yokogawa RS71*C, also cataloged as the RS71*C DCS Module, operates as a dedicated hardware component for field signal processing and real-time data communication within Yokogawa DCS automation platforms. Operating on a 24 VDC power supply, the unit interfaces up to 128 configurable I/O points—supporting analog, digital, pulse, and serial communication paths—driven by onboard processing memory (512 KB to 4 MB RAM, 256 KB to 2 MB Flash) across operating temperatures from -40 to 70 deg C.
Suffix Breakdown & Model Matrix
| Code Segment | Position / Option | Functional Specification |
|---|---|---|
| RS71 | Base Model | Multi-Function Communication & Control Card |
| ***** | Option / Coating Suffix | Functional option / Conformal coating specification |
| C | Generation / Version | Hardware revision designator |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | RS71*C |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.5 kg (1.10 lbs) |
| Dimensions | 130 mm x 100 mm x 50 mm |
| Operating Temp | -40 to 70 deg C |
| Power Consumption | Operating Voltage: 24 VDC |
| Memory Capacity | 512 KB to 4 MB RAM / 256 KB to 2 MB Flash |
| I/O Point Density | Supports up to 128 Configurable Points |
| Operating Humidity | 5% to 95% RH (non-condensing) |
| Hazardous Certifications | ATEX, IECEx, FM, CSA |
| Programming Languages | Ladder Logic, Structured Text, Function Block Diagram |
| Equipment Category | Distributed Control System (DCS) Module |
Field Signal Routing & DCS Loop Integration
The RS71*C executes deterministic data transfer between field instrument networks and central control processors. Built-in signal conditioning channels maintain full pass-through support for 4-20 mA HART loop protocol telemetry, allowing dynamic digital variables to superimpose onto analog control lines without signal attenuation. Galvanic channel-to-channel isolation prevents ground loop interference and protects central bus architecture from common-mode voltage spikes in hazardous area installations.
Frequently Asked Questions
Q: What purpose does the asterisk () suffix serve in the RS71C model code?
A: The asterisk represents specific factory-configured hardware options, such as conformal coating for corrosive environments or specialized memory sizing options.
Q: Is the RS71*C rated for installation in hazardous industrial atmospheres?
A: Yes, the module carries ATEX, IECEx, FM, and CSA hazardous location certifications, allowing installation in designated hazardous zones when installed per regional electrical codes.
Field Installation Guidelines
- Power Isolation: Fully isolate and lock out the 24 VDC primary power supply before inserting, removing, or wiring the RS71*C module.
- Backplane Seating: Align the board edges with the chassis mounting guide rails and push firmly until the locking mechanisms seat fully into the backplane connector.
- Hazardous Location Compliance: Verify that all field wiring meets ATEX/IECEx standards for non-incendive or intrinsically safe loops, ensuring proper cable gland sealing.
- Shield Wire Grounding: Ground all instrument signal cable shields at a single functional earth point on the cabinet bus bar to eliminate ground loop currents.
- Thermal Clearance: Maintain minimum required convection airflow spacing around the module housing to prevent heat buildup up to the 70 deg C thermal limit.
