DS3820RDNA - Addressable Relay Driver Module

SPECIFICATIONS:

Part Number: DS3820RDNA
Manufacturer: General Electric
Series: Mark IV
Product Type: Addressable Relay Driver Module
Maximum Current Draw: 6.5 mA
Number of Channels: 4, 8, or 16
Input Voltage: 24 VDC
Loop Standby Current: 1.5 mA
Relay Operating Current: 30 mA
Average Operating Current: 230μA
Humidity: 10% to 93%
Dimensions: 3.6 × 2.45 × 1.1 in
Operating Temperature: 0°C to 49°C
Operating Voltage: 15 to 32 VDC
Mounting: DIN rail
Repair: 3-7 Days
Weight: 0.25 kg
Country of Origin: USA
Availability: In Stock

FUNCTIONAL DESCRIPTION:

DS3820RDNA is an Addressable Relay Driver Module manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic turbine control systems. Addressable Dual Relay Modules are versatile multi-input/output devices designed for Silent Knight IFP-series fire alarm control panels. Built for intelligent two-wire loops, each module features two independent relay outputs and two Class B monitor inputs, enabling simultaneous monitoring and control of multiple devices. The relay outputs are configured for Form C switching applications and operate without load circuit supervision, making them ideal for controlling auxiliary equipment such as door holders, fans, or dampers.

The monitor inputs interface with normally open contact-type devices like manual pull stations or flow switches, providing real-time status to the fire alarm control panel. Each relay output includes a dedicated green LED for clear visual indication, allowing technicians to quickly verify module operation. Compact and reliable, these modules expand the functionality of Silent Knight IFP systems by combining monitoring and control in a single, easy-to-install solution.

KEY FEATURES OF AN ADDRESSABLE RELAY DRIVER MODULE:

• Communication: The module continuously communicates with the fire alarm control panel over the two-wire addressable loop.
• Relay Activation: Upon receiving a command from the control panel, the module activates the corresponding relay output to control the connected load. Each relay operates independently and supports Form C (SPDT) switching.
• Monitoring: The Class B monitor inputs supervise normally open contact devices, sending real-time status updates and fault conditions to the control panel.
• LED Indication: Each relay output is equipped with a green LED that illuminates when the relay is energized, providing visual confirmation of operation.
• Fault Reporting: Any open-circuit, short-circuit, or module malfunction is detected and reported to the control panel for immediate attention.

CONFIGURATION:

The module includes two independent Form C (SPDT) relay outputs, which can be configured to control auxiliary devices such as fans, dampers, or door holders based on alarm, supervisory, or trouble conditions. These relays are non-supervised, allowing direct load control, and each is equipped with a green LED to indicate energized status. Additionally, the module features two Class B monitor inputs for normally open contact devices, which continuously supervise for open-circuit, short-circuit, or closure conditions and report changes in real time to the control panel. All configuration parameters, including loop address, relay logic, and monitoring type, are stored in the control panel, enabling remote updates without physical intervention. After configuration, engineers should verify loop communication, relay operation, and monitor input functionality, and perform fault simulations to ensure accurate reporting and reliable system performance.

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FREQUENTLY ASKED QUESTIONS:

What type of devices can be connected to the monitor inputs?

The two Class B monitor inputs interface with normally open contact-type devices, such as manual pull stations, flow switches, or other initiating devices.

Do the relay outputs require supervision for the load circuit?

No, the relay outputs operate independently and do not require load circuit supervision, simplifying installation while maintaining reliability.

What are the specifications of the monitor inputs?

The two Class B monitor inputs support normally open contact devices. Each input supervises for open-circuit, short-circuit, or ground fault conditions, reporting device status in real time to the control panel.