OME-DB-24R-24RD

Supported Applications

The Omega OME-DB-24R and OME-DB-24RD series are 24-channel relay output boards designed for I/O control applications. These daughter boards feature on-board relay driver circuits and connect directly to the OME-DIO-24, OME-DIO-48, or OME-DIO-144 digital output boards, as well as other OPTO-22 compatible systems. The series provides isolated switching for external loads via Form C SPDT relays.

Operating Conditions & Performance

The relay elements are rated for a nominal load of 0.5 A @ 120 Vac or 1A @ 24 Vdc, with maximum switching limits of 60 VA and 24 W. Maximum switching voltage is specified at 120 Vac or 60 Vdc, while the maximum switching current is 1A. The mechanical life expectancy is listed as 2 x 10^7 operations, and electrical life expectancy is 2 x 10^5 operations.

Control logic requires a TTL high (+5 V) input to activate the relay (relay on). Power consumption for the board is +12 V @ 528 mA max or +5 V @ 150 mA max. The series operates within an ambient temperature range of 0 to 60°C (32 to 140°F) and a storage temperature range of -20 to 70°C (-4 to 158°F). Humidity ratings are specified as 5 to 90% RH non-condensing. The relay operate time is documented at 6 ms.

Power Requirements

To avoid overloading a PC's power supply, the board requires an external +12 Vdc or +24 Vdc power supply.

Configuration Options

The series is available in two primary configurations distinguished by their connector interfaces:

• OME-DB-24R: Features one 50-pin header compatible with OPTO-22 connectors.
• OME-DB-24RD: Includes both a 50-pin header and a 37-pin D-sub connector for expanded connectivity options.

Voltage versions are offered in +12 V or +24 V configurations. Mounting flexibility is provided through optional DIN-rail mounting kits available for both the OME-DB-24R and OME-DB-24RD models. The physical dimensions of the board are 132 H x 225 mm W (8.1 x 4.5").

Accessories and Cables

The series supports various cabling options to facilitate connection:

• OME-CA-5015: 50-pin flat cable, 1.5m (5').
• OME-CA-3710: 37-pin male-male D-sub connector cable, 1 m (3').
• OME-CA-3720: 37-pin male-male D-sub connector cable, 2 m (7').

Screw terminals are included for easy field wiring of the relay outputs.

Key Product Differences

The OME-DB-24R and OME-DB-24RD models differ primarily in their connector topology. The OME-DB-24R utilizes a single 50-pin header, whereas the OME-DB-24RD adds a 37-pin D-sub connector alongside the standard 50-pin header.

Model numbers indicate voltage and mounting configuration:

• /12: Denotes the +12 V version (e.g., OME-DB-24R/12).
• /24: Denotes the +24 V version (e.g., OME-DB-24R/24).
• /DIN: Indicates inclusion of a DIN-rail mounting kit.

Each board includes an operator's manual on CD ROM. The series is covered by the standard 1-year warranty, with the OMEGACARE™ extended warranty program available to extend coverage to a total of 2 years for parts and labor.