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SPECIFICATIONS:
Part Number: DS3800HRDB1D
Manufacturer: General Electric
Series: Mark IV
Product Type: Relay Driver Card
System Voltage: 12 to 48 volts
Max. Channel Current: 750 mA
Max. Channel Input Voltage: Battery Voltage
Size: 8.25 cm high x 4.18 cm
Min Operating Voltage: 8 volts
Operating Temperature: –40°C to +45°C
Transient Surge Protection: 1500 W
Voltage Accuracy: ± 50 mV
DIN Rail Attachment: 35 mm
Repair: 3-7 Day
Availability: In Stock
Weight: 0.2 kg
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
DS3800HRDB1D is a Relay Driver Card manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic Gas Turbine Control Systems. The Relay Driver is a logic module designed for high-level system control, including load management, generator start, and alarm signaling. It features four independent relay driver outputs, operating in a stand-alone mode based on battery voltage and threshold settings or through digital data inputs from MeterBus-enabled devices. Additionally, these four channels can function as analog inputs to trigger voltage-based actions.
The card features 64 channels for low-side switching of external relays. Users can connect a positive voltage source to one terminal of a relay coil and the other to a 50-411A output. Each output supports up to 1 A of continuous current and includes protection against overcurrent, thermal overload, and overvoltage. Built-in safeguards prevent failure even when directly exposed to voltages up to 30 V. Inductive load spikes are clamped at 80 V, allowing relay coil energy up to 550 mJ to be dissipated without additional diode clamps. An isolation barrier prevents relay coil current from flowing back into the PCI slot.
FUNCTIONS OF RELAY DRIVER CARD:
Low-side switching allows the card to control external relays by connecting or disconnecting the ground side of the circuit. This method is commonly used in industrial applications because it simplifies wiring and enhances reliability. By sinking current, the module efficiently switches loads such as relays, motors, and solenoids while maintaining circuit stability.
To activate a relay, a positive voltage source is connected to one terminal of the relay coil, while the other terminal is linked to an output channel of the 50-411A card. When the output is switched on, it completes the circuit by grounding the relay coil, allowing current to flow and energizing the relay. This setup enables seamless automation of electrical devices, making it suitable for remote control applications.
Each output channel is capable of sinking up to 1 A of continuous current, making it suitable for handling multiple relays and inductive loads. This ensures stable operation without excessive heating or power fluctuations. The high current capacity allows for reliable switching of high-power devices, making the card ideal for demanding industrial and automation systems.
Built-in protection mechanisms safeguard the card from damage due to excessive current, overheating, or voltage surges. The overcurrent protection prevents circuit damage by limiting the flow of excessive current. Thermal protection ensures the card shuts down or reduces operation if temperatures exceed safe levels. Additionally, overvoltage protection prevents unexpected voltage spikes from damaging internal components, enhancing long-term reliability.
The module is designed to withstand direct exposure to voltages up to 30V, ensuring compatibility with various relay coils. This voltage tolerance allows the card to function reliably across different electrical setups, even in environments with fluctuating power levels. Its ability to handle higher voltages without failure makes it a durable choice for industrial control systems.
When switching inductive loads, voltage spikes can occur due to stored energy in relay coils. The card effectively clamps these spikes at 80V, preventing potential damage to the circuit. Additionally, it can dissipate relay coil energy up to 550 mJ without requiring extra diode clamps, simplifying circuit design and reducing additional component costs.
The module features an isolation barrier that blocks relay coil current from feeding back into the PCI slot, protecting the motherboard and connected systems. This prevents unintended electrical interference that could cause system malfunctions or data corruption. By ensuring proper electrical isolation, the card enhances system stability and longevity.
WOC has the largest stock of Replacement Parts for GE Speedtronic Gas Turbine Control Systems. We can also repair your faulty boards and supply unused and rebuilt boards backed up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on parts and repairs, kindly contact our team by phone or email.
What is the primary function of the 50-411A Relay Driver Card?
The 50-411A Relay Driver Card is designed to control up to 64 external relays using low-side switching. It provides efficient load control by sinking current, enabling seamless automation in industrial and commercial applications.
How does low-side switching work in this module?
Low-side switching means the module controls the negative (ground) side of the circuit, while the positive voltage remains fixed. This approach simplifies wiring and enhances reliability by minimizing electrical noise and interference.
How does the card manage inductive loads?
The card clamps voltage spikes at 80V and can dissipate relay coil energy up to 550 mJ without requiring additional diode clamps. This protects the circuit and reduces the need for extra components.
