With more than 30.000 high-quality spare parts, they can be sold immediately. Our large inventory allows us to quickly meet customer needs, thereby reducing downtime and protecting production schedules. Our timely delivery time provides you with security and save money.
ABB Drive System Control Relay Output Board
High-Current Galvanic Isolation Digital Output Card
Executes multi-channel contact switching for external interlocks
and breaker tripping without signal cross-interference
The SAFT175RDO is a relay output interface board for medium-voltage drives and excitation cabinets. Serving as an isolation interface, it converts digital control commands into physical contact actions to drive external circuit breaker tripping, safety interlocks, or status indications.
Pluggable Screw Terminals
Integrated RC Snubber Circuits
NO/NC Dry Contact Configurations
The SAFT175RDO consists of a conformal-coated printed circuit board with ribbon connectors for the controller bus and pluggable screw terminal blocks for external cable connections. Each channel integrates freewheeling diodes and RC snubber circuits to reduce arcing and reverse electromotive forces from inductive loads. Each output channel provides both normally open and normally closed dry contacts. The board incorporates physical test points for measuring control logic voltages and contact resistance under energized conditions.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
ABB SAFT175RDO Relay Output Board Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Hydroelectric Power Generation
Used in hydro-generator excitation control systems to output commands for main circuit breaker tripping and emergency gate closure interlocks.
Thermal Power Generation
Used in high-voltage VFD cabinets for large boiler forced-draft and induced-draft fans to execute fan start/stop controls and logic interlocking.
Petroleum Refining
Used in main drive synchronous motor excitation cabinets for rich-gas centrifugal compressors in catalytic cracking units to control high-voltage contactor switching.
Natural Gas Transmission
Installed in control cabinets of gas-turbine or high-power motor driven compressors at pipeline pressurization stations to link with external safety shutoff valves.
Iron & Steel Metallurgy
Used in large medium-voltage drive systems for blast furnace blowers to execute emergency shutdown (ESD) status outputs during system faults.
Metal Rolling
Used in main drive multi-stand synchronous motor control cabinets for hot or cold rolling mills to drive mechanical brake release and engagement control loops.
Hot-swapping is prohibited; isolate control power and load loops and use ESD protection before swapping. Field wiring must remain within rated voltage and current limits, keeping RC snubbers intact to prevent arcing. Tighten terminal screws regularly against vibration-induced loose contacts, and keep the cabinet dry and clean to preserve inter-channel galvanic isolation.
Technical notes
Technical notes
The board features multiple channels with complete galvanic isolation between each other, integrating status LEDs for direct monitoring of individual channel switching behaviors.
What is the primary system function of SAFT175RDO?
Acts as a digital output interface, converting control signals into physical contact actions.
How to install SAFT175RDO inside an industrial cabinet?
Mount it on the rack or control rail and plug in the corresponding rear data ribbon cables.
How does SAFT175RDO achieve galvanic isolation?
Provides physical isolation between high and low voltages via onboard mechanical relay contacts.
How to connect external devices to SAFT175RDO?
Wire external interlocks or trip circuits into its onboard standard screw terminals.
How to check SAFT175RDO output status without disconnecting wires?
Monitor it by observing the status LED indicators corresponding to each channel on the board.
Does SAFT175RDO support live hot-swapping when damaged?
No, control power and external load circuits must be isolated before swapping this board.
Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, modules and cards, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
Videos
News
Applications
