RS-232/422 Serial Converter (Full-Duplex)

Ideal Use Cases

The RDL RU-SC2 is intended for systems that require conversion between RS-232 and RS-422 while carrying serial data over long lines. It is identified as a full-duplex converter and is suitable for projects specified around full-duplex serial operation. The unit can operate free-standing or be incorporated into a rack installation, providing two documented placement options. Its ambient operating range is 0° C to 55° C, which should be considered when selecting the equipment location.

Why Choose This Model

The RU-SC2 focuses on three defined requirements: RS-232 to RS-422 conversion, serial-data transmission over long lines, and rack-mountable convenience. The RS-232 control input/output uses a DB-9 female jack. For installations that need organized rack placement, the converter occupies two bays in an RU-RA3 Rack Adapter. It can also operate as a free-standing unit when rack mounting is not required.

• Full-duplex RS-232 and RS-422 conversion
• Designed for serial data over long lines
• Free-standing or two-bay RU-RA3 mounting
• Ground-referenced 24 Vdc operation

The recommended power supplies are the PS-24AS for the USA and PS-24AX for international use. A power supply is not included.

Installation and Integration

The enclosure measures 1.75 inches high by 3.98 inches deep by 11.60 inches wide, equivalent to 4.40 by 10.10 by 29.50 centimeters. These dimensions support planning for either a free-standing equipment position or the two required bays in an RU-RA3 Rack Adapter. The provided connection specification identifies the RS-232 interface as a DB-9 female jack.

Power must be ground-referenced 24 Vdc at 200 mA. Integrators should match the installation to that voltage, current requirement, and grounding specification. The recommended PS-24AS and PS-24AX supplies are listed separately because the required supply is not included with the converter. The documented ambient operating environment extends from 0° C to 55° C.

Performance Highlights

The primary performance function is full-duplex conversion between RS-232 and RS-422 for serial communication over long lines. The supplied technical data also identifies eight open-collector control outputs rated at 50 mA and eight status inputs for which low is active. Those status inputs are internally pulled high to 5 V and have a maximum input of 24 Vdc.

Eight ground-referenced 0 to 10 Vdc outputs are also listed, with 22 Ω output characteristics, 20 mA capability, and 256 steps. Their documented ramp rate is adjustable from 0.5 to 120 seconds for a full-scale change, with individual programming. These entries provide specific current, voltage, step, and timing values for integration planning without extending the product beyond the supplied specifications.

What Makes It Different

The RU-SC2 combines its defined serial-conversion role with a physical format that supports both rack-mounted and free-standing operation. This allows the same model to be considered for an RU-RA3 installation or a standalone equipment arrangement. The listed WEEE weight is 2.575 pounds, while shipping weight is 3.105 pounds. It ships in a cardboard box with package dimensions of 12 by 8 by 2.75 inches.

Supporting resources identified for the model include a PDF datasheet, an American DXF engineering functional block file, American DXF front and rear panel diagrams, and high-resolution imagery in TIF format. These documented resources provide additional references for system and panel planning.

Final Assessment

The RDL RU-SC2 is a focused choice when a project calls for full-duplex RS-232 and RS-422 conversion, serial data transmission over long lines, and a choice between free-standing and rack-mounted placement. Its DB-9 female RS-232 connection, ground-referenced 24 Vdc at 200 mA requirement, two-bay RU-RA3 mounting format, and specified operating-temperature range provide concrete criteria for confirming compatibility. Power-supply selection should be included in project planning because the recommended supply is not included.