Yokogawa LCA*C DCS Signal Conditioner PCB
The Yokogawa LCA*C, also cataloged as the LCAC Signal Conditioner PCB, operates as a dedicated hardware component for signal normalization and galvanic isolation within Yokogawa CENTUM series DCS platforms. The card conditions raw analog inputs from transmitters and sensor loops, converting 4-20 mA, 1-5 VDC, and mV signals into standardized internal logic levels to maintain high-accuracy data transmission across system backplane buses.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | LCA*C |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | Standard PCB weight |
| Dimensions | Standard Yokogawa card nest PCB dimensions |
| Operating Temp | -20 deg C to +60 deg C |
| Power Consumption | Supplied via system backplane |
| Module Type | Signal Conditioner / I/O Interface Board |
| Isolation Voltage | 1500 VAC between field side and system side |
| Input Signal Support | 4-20 mA, 1-5 VDC, mV ranges |
| Mounting Type | Plug-in PCB for card nests |
4-20 mA HART & Fieldbus Communication Protocols
The Yokogawa LCA*C signal conditioner card integrates high-grade channel-to-channel isolation circuits to break ground loop pathways and isolate control electronics from field-side voltage spikes up to 1500 VAC. Dedicated analog filtering stage architectures suppress high-frequency electromagnetic and radio-frequency interference (EMI/RFI), ensuring low thermal drift and high-fidelity 4-20 mA and 1-5 VDC signal translation across variable ambient operating conditions.
Frequently Asked Questions
Q: What isolation rating does the LCA*C PCB provide between field instrumentation and the DCS backplane?
A: The board maintains 1500 VAC galvanic isolation between field-side input terminals and system-side backplane circuits to protect control electronics from transient surges.
Q: How is operating power supplied to the LCA*C signal conditioner board?
A: Power is drawn directly from the internal system backplane rail upon inserting the PCB into a compatible Yokogawa DCS card nest.
Field Installation Guidelines
- Ensure target card nest rack power is de-energized prior to inserting or removing the LCA*C PCB to prevent edge-connector arcing.
- Verify field-side signal cables (4-20 mA or 1-5 VDC) are routed in dedicated instrument trays separate from high-voltage AC conductors.
- Ground all instrument cable shields at a single point on the cabinet busbar to eliminate ground loops and optimize noise rejection performance.
- Maintain proper vertical clearance above and below the card nest to permit natural convection cooling and ensure ambient cabinet temperatures remain within -20 deg C to +60 deg C.
Yokogawa LCA*C DCS Signal Conditioner PCB
Yokogawa LCA*C DCS Signal Conditioner PCB
The Yokogawa LCA*C, also cataloged as the LCAC Signal Conditioner PCB, operates as a dedicated hardware component for signal normalization and galvanic isolation within Yokogawa CENTUM series DCS platforms. The card conditions raw analog inputs from transmitters and sensor loops, converting 4-20 mA, 1-5 VDC, and mV signals into standardized internal logic levels to maintain high-accuracy data transmission across system backplane buses.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | LCA*C |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | Standard PCB weight |
| Dimensions | Standard Yokogawa card nest PCB dimensions |
| Operating Temp | -20 deg C to +60 deg C |
| Power Consumption | Supplied via system backplane |
| Module Type | Signal Conditioner / I/O Interface Board |
| Isolation Voltage | 1500 VAC between field side and system side |
| Input Signal Support | 4-20 mA, 1-5 VDC, mV ranges |
| Mounting Type | Plug-in PCB for card nests |
4-20 mA HART & Fieldbus Communication Protocols
The Yokogawa LCA*C signal conditioner card integrates high-grade channel-to-channel isolation circuits to break ground loop pathways and isolate control electronics from field-side voltage spikes up to 1500 VAC. Dedicated analog filtering stage architectures suppress high-frequency electromagnetic and radio-frequency interference (EMI/RFI), ensuring low thermal drift and high-fidelity 4-20 mA and 1-5 VDC signal translation across variable ambient operating conditions.
Frequently Asked Questions
Q: What isolation rating does the LCA*C PCB provide between field instrumentation and the DCS backplane?
A: The board maintains 1500 VAC galvanic isolation between field-side input terminals and system-side backplane circuits to protect control electronics from transient surges.
Q: How is operating power supplied to the LCA*C signal conditioner board?
A: Power is drawn directly from the internal system backplane rail upon inserting the PCB into a compatible Yokogawa DCS card nest.
Field Installation Guidelines
- Ensure target card nest rack power is de-energized prior to inserting or removing the LCA*C PCB to prevent edge-connector arcing.
- Verify field-side signal cables (4-20 mA or 1-5 VDC) are routed in dedicated instrument trays separate from high-voltage AC conductors.
- Ground all instrument cable shields at a single point on the cabinet busbar to eliminate ground loops and optimize noise rejection performance.
- Maintain proper vertical clearance above and below the card nest to permit natural convection cooling and ensure ambient cabinet temperatures remain within -20 deg C to +60 deg C.
