Yokogawa SARM55C Digital Relay Output Terminal Board
Configured for relay output execution in CENTUM VP / CENTUM CS 3000 systems, the Yokogawa SARM55C , also cataloged as the SARM55C Digital Relay Output Terminal Board, provides direct physical/electrical execution for 32 digital channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SARM55C Terminal Board |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 2.2 kg |
| Dimensions | Standard Yokogawa rack-mount footprint |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | 24 VDC field-supplied power |
| Channel Count | 32 relay output channels |
| Output Type | Relay contact (Form A or Form C depending on model) |
| Field Terminals | M4 screw terminals |
| Isolation | Channel-to-channel and channel-to-system isolation |
| Protection | Inductive load suppression for voltage spike protection |
| Mounting | Rack-mounted, compatible with Yokogawa I/O systems |
| Environmental Tolerance | Industrial-grade PCB with protective coating |
Digital Loop Isolation & Relay Output Characteristics
The interface unit provides galvanic channel-to-channel and channel-to-system isolation across all 32 relay channels to isolate control electronics from high-voltage field transients. Integrated inductive load suppression circuitry attenuates reverse voltage spikes caused by inductive field devices such as solenoids and interposing relays. Channel routing preserves signal integrity across the backplane bus, keeping total loop noise low in high-density digital execution architecture.
Frequently Asked Questions
Q: What size field wiring connections are supported by the SARM55C terminal board?
A: The board utilizes M4 screw terminals to provide secure mechanical clamping and low-resistance electrical contact for field wiring connections.
Q: How are voltage spikes handled when switching inductive loads like solenoids?
A: Each channel features onboard inductive load suppression to absorb inductive voltage spikes and extend relay contact life.
Q: Can channels be configured as Form A or Form C contacts?
A: The contact configuration (Form A or Form C) depends on the specific hardware model variant of the SARM55C board selected.
Field Installation Guidelines
- Mount the terminal board securely onto the Yokogawa I/O rack frame, confirming mechanical latches engage properly.
- Ensure ambient cabinet temperatures remain within the -20 to +70 deg C operating window.
- Terminate field wiring to the M4 screw terminals using properly sized ring or spade lugs; torque all connections evenly to prevent loose contacts under high vibration.
- Connect field-supplied 24 VDC power lines with correct polarity before energizing output loads.
- Ensure proper cabinet grounding to maximize the effectiveness of onboard surge and noise suppression circuits.
Yokogawa SARM55C Digital Relay Output Terminal Board
Yokogawa SARM55C Digital Relay Output Terminal Board
Configured for relay output execution in CENTUM VP / CENTUM CS 3000 systems, the Yokogawa SARM55C , also cataloged as the SARM55C Digital Relay Output Terminal Board, provides direct physical/electrical execution for 32 digital channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SARM55C Terminal Board |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 2.2 kg |
| Dimensions | Standard Yokogawa rack-mount footprint |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | 24 VDC field-supplied power |
| Channel Count | 32 relay output channels |
| Output Type | Relay contact (Form A or Form C depending on model) |
| Field Terminals | M4 screw terminals |
| Isolation | Channel-to-channel and channel-to-system isolation |
| Protection | Inductive load suppression for voltage spike protection |
| Mounting | Rack-mounted, compatible with Yokogawa I/O systems |
| Environmental Tolerance | Industrial-grade PCB with protective coating |
Digital Loop Isolation & Relay Output Characteristics
The interface unit provides galvanic channel-to-channel and channel-to-system isolation across all 32 relay channels to isolate control electronics from high-voltage field transients. Integrated inductive load suppression circuitry attenuates reverse voltage spikes caused by inductive field devices such as solenoids and interposing relays. Channel routing preserves signal integrity across the backplane bus, keeping total loop noise low in high-density digital execution architecture.
Frequently Asked Questions
Q: What size field wiring connections are supported by the SARM55C terminal board?
A: The board utilizes M4 screw terminals to provide secure mechanical clamping and low-resistance electrical contact for field wiring connections.
Q: How are voltage spikes handled when switching inductive loads like solenoids?
A: Each channel features onboard inductive load suppression to absorb inductive voltage spikes and extend relay contact life.
Q: Can channels be configured as Form A or Form C contacts?
A: The contact configuration (Form A or Form C) depends on the specific hardware model variant of the SARM55C board selected.
Field Installation Guidelines
- Mount the terminal board securely onto the Yokogawa I/O rack frame, confirming mechanical latches engage properly.
- Ensure ambient cabinet temperatures remain within the -20 to +70 deg C operating window.
- Terminate field wiring to the M4 screw terminals using properly sized ring or spade lugs; torque all connections evenly to prevent loose contacts under high vibration.
- Connect field-supplied 24 VDC power lines with correct polarity before energizing output loads.
- Ensure proper cabinet grounding to maximize the effectiveness of onboard surge and noise suppression circuits.
