Relais box serial converter/repeater/isolator, ONLINE USV-Systeme CON_R_AUX, 12 V, 500 mA, 68×45×78 mm, 0.1 kg, black/green

The Relais box serial converter/repeater/isolator from ONLINE USV-Systeme (model CON_R_AUX) is a compact interface module designed for reliable signal conversion, repetition and galvanic isolation in UPS control panels, alarm systems and industrial applications. The unit accepts a 12 V supply and draws up to 500 mA. Its small footprint (68×45×78 mm) and lightweight construction (0.1 kg) make it suitable for integration into control cabinets, DIN-rail or surface-mounted enclosures where space is limited. The black and green housing provides a clear visual distinction for wiring and mounting points.

Advantages

The device provides galvanic isolation to protect sensitive control electronics from ground loops and interference, while also functioning as a serial signal repeater or converter to extend communication range or adapt interface levels. Its low power consumption and compact dimensions reduce thermal load and installation space requirements. The straightforward design simplifies integration with UPS control circuits, alarm panels and various industrial interfaces requiring reliable relay-based switching and signal integrity.

Suitable for

• UPS control panels for remote signalling and auxiliary contacts
• Alarm and security systems requiring isolated relay outputs
• Industrial interface adaptation between different voltage levels
• Extending serial signal lines or repeating signals across longer distances
• Applications needing galvanic isolation to prevent ground loop issues

Key specifications

• Supply voltage: 12 V DC
• Maximum supply current: 500 mA
• Dimensions (W×H×D): 68 × 45 × 78 mm
• Weight: 0.1 kg
• Functionality: relay-based serial converter, repeater and galvanic isolator
• Housing colours: black and green

How to use

Mount the module in an appropriate enclosure or on a DIN rail according to available space and wiring access. Connect the 12 V DC supply to the designated input terminals, observing polarity. Wire the serial or control signal lines and relay contacts as required for your UPS, alarm or industrial interface, following the system wiring diagrams and safety standards. Verify correct operation by checking signal continuity, relay switching behaviour and isolation using suitable test equipment before placing the device into continuous service.

Recommendations

Install the unit in a dry, ventilated environment away from strong electromagnetic interference. Use appropriate fuses or overcurrent protection on the 12 V supply and follow local wiring regulations. For best performance, ensure ground and shielding practices are applied to serial lines and verify compatibility with the connected control system's voltage and logic levels.