Product Details
The Yokogawa CH1*A, also cataloged as the CH1 Signal Conditioner Card, operates as a dedicated hardware component for signal conditioning and electrical isolation within CENTUM V and CENTUM VP systems. It conditions, isolates, and converts analog and digital I/O lines between field-side sensors and system-side backplane communication buses.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CH1*A (CH1 Suffix A) |
| Brand | Yokogawa |
| Origin | Japan |
| Operating Temp | -10 to +55 deg C |
| Power Consumption | Nest backplane powered |
| Module Type | Signal Conditioner Card |
| Isolation Rating | Three-way galvanic isolation (input, output, and power supply) |
| Signal Types | Analog and digital I/O (variant-dependent) |
| Mounting Format | Sub-rack signal conditioner nest slot |
| Platform Compatibility | CENTUM V, CENTUM VP, migrated Yokogawa systems |
4-20 mA HART Loop Protocol and Channel Isolation
The CH1*A signal conditioner board features high-integrity galvanic isolation configured across input, output, and power distribution paths to suppress common-mode electrical interference and eliminate ground loop voltages. Designed for integration within field signal conditioner nests, the module conditions both 4-20 mA HART loop protocol analog signals and discrete digital I/O lines. Internal filtering networks stabilize line impedance variations and maintain loop linearity prior to routing formatted process variables over the backplane bus to central system processors.
Frequently Asked Questions
Q: How is primary operational power provided to the CH1*A card?
A: Power is distributed directly from the signal conditioner nest backplane assembly upon sliding the card into its designated slot.
Q: What level of electrical isolation does the CH1*A card maintain?
A: The card incorporates three-way galvanic isolation, decoupling the input signal, output signal, and internal power supply circuits from each other.
Q: Can the CH1*A module be utilized in legacy Yokogawa system upgrades?
A: Yes, the card is designed for cross-platform hardware compatibility across CENTUM V, CENTUM VP, and migrated Yokogawa control system nests.
Field Installation Guidelines
- ESD Protection: Put on a grounded anti-static wrist strap before handling the circuit card to prevent electrostatic discharge to sensitive components.
- Nest Insertion: Align the printed circuit board edges with the guide rails of the signal conditioner nest and slide the card in firmly until the backplane connector seats completely.
- Shield Grounding: Ensure field instrument cable drain wires are terminated at a single system earthing point on the cabinet ground bar to block induced high-frequency noise.
- Wiring Separation: Route field I/O lines in isolated cable channels separate from high-voltage AC power lines to avoid electromagnetic cross-talk.
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.
Tech & Buying Guide
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