Yokogawa SARM55D Analog Input Terminal Board
The Yokogawa SARM55D Terminal Board , also cataloged as the SARM55D Analog Input Terminal Interface, operates as a dedicated hardware component for field wiring terminations and analog signal conditioning within CENTUM VP / CENTUM CS 3000 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SARM55D Terminal Board |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | Standard terminal board weight |
| Dimensions | Standard Yokogawa terminal board footprint |
| Operating Temp | -20 to +55 deg C (cabinet dependent) |
| Power Consumption | Passive pass-through / Module dependent |
| System Compatibility | CENTUM VP / CENTUM CS 3000 |
| Channel Count | 16 channels |
| Supported Input Signals | 4-20 mA current, 1-5 VDC voltage inputs |
| Signal Isolation | Channel-to-channel and channel-to-system isolation |
| Field Terminal Type | Screw-type or clamp-type (variant dependent) |
| Mounting | Yokogawa I/O baseplate mounting |
| Relative Humidity | 5-95% RH, non-condensing |
| Interface Connector | Dedicated backplane connector for SARM55D module |
Signal Routing & HART Loop Conditioning
The unit features galvanically isolated analog signal pass-through lines supporting 4-20 mA HART loop protocol communications across all 16 channels. High channel-to-channel isolation prevents ground loop interference and cross-channel noise propagation between process instrumentation and the main subsystem logic. The integrated shield grounding bus provides stable continuous drain points for low-amplitude voltage signals, keeping total harmonic distortion minimal across the system interface backplane.
Frequently Asked Questions
Q: Can field transmitters be wired directly to the terminal board without active signal converters?
A: Yes. The board directly accepts standard 4-20 mA loop signals and 1-5 VDC inputs through designated terminal connections for routing to the parent I/O module.
Q: How is shield grounding handled on this terminal interface?
A: Dedicated shield terminal points are tied to the industrial ground bus to minimize noise interference on analog input channels.
Q: Does replacing the terminal board require disconnecting the main backplane cable?
A: Physical terminal board replacement requires locking out the active loop power and detaching the dedicated backplane connector from the SARM55D module interface.
Field Installation Guidelines
- Mount the terminal board securely onto the designated Yokogawa I/O baseplate within an industrial enclosure maintaining an ambient temperature of -20 to +55 deg C.
- Ensure all field wiring for 4-20 mA current loops and 1-5 VDC signals is stripped to recommended lengths and torqued down properly according to terminal specs (screw or clamp type).
- Connect signal cable shields to the designated ground terminals; maintain single-point grounding to prevent ground loops.
- Verify tight engagement of the dedicated backplane connector between the SARM55D terminal board and the corresponding analog input module before applying loop power.
Yokogawa SARM55D Analog Input Terminal Board
Yokogawa SARM55D Analog Input Terminal Board
The Yokogawa SARM55D Terminal Board , also cataloged as the SARM55D Analog Input Terminal Interface, operates as a dedicated hardware component for field wiring terminations and analog signal conditioning within CENTUM VP / CENTUM CS 3000 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SARM55D Terminal Board |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | Standard terminal board weight |
| Dimensions | Standard Yokogawa terminal board footprint |
| Operating Temp | -20 to +55 deg C (cabinet dependent) |
| Power Consumption | Passive pass-through / Module dependent |
| System Compatibility | CENTUM VP / CENTUM CS 3000 |
| Channel Count | 16 channels |
| Supported Input Signals | 4-20 mA current, 1-5 VDC voltage inputs |
| Signal Isolation | Channel-to-channel and channel-to-system isolation |
| Field Terminal Type | Screw-type or clamp-type (variant dependent) |
| Mounting | Yokogawa I/O baseplate mounting |
| Relative Humidity | 5-95% RH, non-condensing |
| Interface Connector | Dedicated backplane connector for SARM55D module |
Signal Routing & HART Loop Conditioning
The unit features galvanically isolated analog signal pass-through lines supporting 4-20 mA HART loop protocol communications across all 16 channels. High channel-to-channel isolation prevents ground loop interference and cross-channel noise propagation between process instrumentation and the main subsystem logic. The integrated shield grounding bus provides stable continuous drain points for low-amplitude voltage signals, keeping total harmonic distortion minimal across the system interface backplane.
Frequently Asked Questions
Q: Can field transmitters be wired directly to the terminal board without active signal converters?
A: Yes. The board directly accepts standard 4-20 mA loop signals and 1-5 VDC inputs through designated terminal connections for routing to the parent I/O module.
Q: How is shield grounding handled on this terminal interface?
A: Dedicated shield terminal points are tied to the industrial ground bus to minimize noise interference on analog input channels.
Q: Does replacing the terminal board require disconnecting the main backplane cable?
A: Physical terminal board replacement requires locking out the active loop power and detaching the dedicated backplane connector from the SARM55D module interface.
Field Installation Guidelines
- Mount the terminal board securely onto the designated Yokogawa I/O baseplate within an industrial enclosure maintaining an ambient temperature of -20 to +55 deg C.
- Ensure all field wiring for 4-20 mA current loops and 1-5 VDC signals is stripped to recommended lengths and torqued down properly according to terminal specs (screw or clamp type).
- Connect signal cable shields to the designated ground terminals; maintain single-point grounding to prevent ground loops.
- Verify tight engagement of the dedicated backplane connector between the SARM55D terminal board and the corresponding analog input module before applying loop power.
