Yokogawa ST4*D Status Input Card
The Yokogawa ST4*D, also cataloged as the ST4*D Multi Status Input Card, operates as a dedicated hardware component for binary state acquisition and status signal processing within Yokogawa Centum XL - micro XL control nodes. The card accepts multiple digital status inputs, routing discrete process contact states from field devices directly to the control station processor via a block connection with CCS.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ST4*D |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 2.0 lbs (0.9 kg) |
| Dimensions | 1.8 in x 7.9 in x 14.9 in (2.8 cm x 17.8 cm x 35.6 cm) |
| Operating Temp | -20 to +60 deg C (-4 to +140 deg F) |
| Power Consumption | System Backplane Powered |
| Storage Temp | -40 to +85 deg C (-40 to +185 deg F) |
| Ambient Humidity | 10 to 95 %RH non-condensing |
| System Compatibility | Yokogawa Centum XL - micro XL |
| Connection Method | Block connection with CCS |
| Mounting Configuration | Horizontal and vertical |
Channel Isolation & Loop Signal Processing
The Yokogawa ST4*D input card incorporates high-density optocoupler arrays to maintain channel-to-channel isolation parameters across status monitoring circuits, protecting backplane logic from field-side voltage transients. The input channel filtering architecture suppresses contact bounce and high-frequency common-mode noise, maintaining signal integrity when processing discrete state updates. This isolated design ensures uninterrupted data acquisition across distributed architecture nodes while preventing ground loops from affecting adjacent 4-20 mA HART loop protocol signals or digital field network runs.
Frequently Asked Questions
Q: Can the ST4D module be installed in both horizontal and vertical chassis orientations?
A: Yes. The ST4D hardware assembly supports both horizontal and vertical mounting configurations within compatible Yokogawa Centum XL and micro XL node card cages.
Q: What interface method is used to connect field wiring to the ST4*D card?
A: The module utilizes a block connection with CCS interface to route multi-point field status inputs directly to the card's input conditioning circuitry.
Field Installation Guidelines
- System Power Isolation: De-energize the rack backplane power and isolate all field contact voltage sources prior to inserting or removing the ST4*D input card from the chassis slot.
- Card Cage Insertion: Align the card circuit board edges with the top and bottom guide rails of the designated Centum XL - micro XL slot. Push firmly until the rear connector seats fully into the backplane socket.
- Signal Block Connection: Secure the CCS block connection housing to the front interface connector of the ST4*D card. Tighten retaining screws to lock the assembly against operational vibration.
- Shielding and Grounding: Ensure all field signal cable shields are grounded at a single dedicated system earth point to prevent ground loops and maintain electromagnetic interference immunity.
Yokogawa ST4*D Status Input Card
Yokogawa ST4*D Status Input Card
The Yokogawa ST4*D, also cataloged as the ST4*D Multi Status Input Card, operates as a dedicated hardware component for binary state acquisition and status signal processing within Yokogawa Centum XL - micro XL control nodes. The card accepts multiple digital status inputs, routing discrete process contact states from field devices directly to the control station processor via a block connection with CCS.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ST4*D |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 2.0 lbs (0.9 kg) |
| Dimensions | 1.8 in x 7.9 in x 14.9 in (2.8 cm x 17.8 cm x 35.6 cm) |
| Operating Temp | -20 to +60 deg C (-4 to +140 deg F) |
| Power Consumption | System Backplane Powered |
| Storage Temp | -40 to +85 deg C (-40 to +185 deg F) |
| Ambient Humidity | 10 to 95 %RH non-condensing |
| System Compatibility | Yokogawa Centum XL - micro XL |
| Connection Method | Block connection with CCS |
| Mounting Configuration | Horizontal and vertical |
Channel Isolation & Loop Signal Processing
The Yokogawa ST4*D input card incorporates high-density optocoupler arrays to maintain channel-to-channel isolation parameters across status monitoring circuits, protecting backplane logic from field-side voltage transients. The input channel filtering architecture suppresses contact bounce and high-frequency common-mode noise, maintaining signal integrity when processing discrete state updates. This isolated design ensures uninterrupted data acquisition across distributed architecture nodes while preventing ground loops from affecting adjacent 4-20 mA HART loop protocol signals or digital field network runs.
Frequently Asked Questions
Q: Can the ST4D module be installed in both horizontal and vertical chassis orientations?
A: Yes. The ST4D hardware assembly supports both horizontal and vertical mounting configurations within compatible Yokogawa Centum XL and micro XL node card cages.
Q: What interface method is used to connect field wiring to the ST4*D card?
A: The module utilizes a block connection with CCS interface to route multi-point field status inputs directly to the card's input conditioning circuitry.
Field Installation Guidelines
- System Power Isolation: De-energize the rack backplane power and isolate all field contact voltage sources prior to inserting or removing the ST4*D input card from the chassis slot.
- Card Cage Insertion: Align the card circuit board edges with the top and bottom guide rails of the designated Centum XL - micro XL slot. Push firmly until the rear connector seats fully into the backplane socket.
- Signal Block Connection: Secure the CCS block connection housing to the front interface connector of the ST4*D card. Tighten retaining screws to lock the assembly against operational vibration.
- Shielding and Grounding: Ensure all field signal cable shields are grounded at a single dedicated system earth point to prevent ground loops and maintain electromagnetic interference immunity.
