Digital output module romod 4DO-R eco

Modbus RTURS4854-O

Product overview
The digital output module romod 4DO-R eco controls four lighting circuits or other digital actuators via bistable relay outputs. Each relay provides a normally open contact accessible at the terminals. Outputs can be configured to a defined safe state after loss of valid Modbus telegrams with a common timeout. A configurable minimum delay between switching operations reduces system disturbances. The module connects to the bus via RS485 and uses Modbus RTU for communication.

Technical data

• Model: romod 4DO-R eco
• Outputs: 4 relay outputs (normally open, bistable)
• Rated load: 16 A at 250 VAC per output
• Max. switching voltage: 277 VAC
• Max. switching capacity: 4432 VA (AC)
• Initial contact resistance: approx. 100 mOhm (1 A / 6 VDC)
• Minimum switching current: 100 mA (>=5 VDC)
• Endurance: approx. 25,700 operations (rated load)
• Bus interface: RS485, Modbus RTU (8-N-1)
• Supported baud rates: Autobauding, 9,600 / 19,200 / 38,400 / 57,600 Baud
• Power supply: 24 V AC/DC
• Typical current consumption: 14 mA (DC), 40 mA (AC)
• Power dissipation max.: 0.4 W (DC), 1.0 W (AC)
• Delay time between switching operations: configurable
• Configuration storage: internal EEPROM (approx. 100,000 write cycles)
• Operating temperature: 0...50 °C
• Storage/transport temperature: 0...70 °C
• Relative humidity: 10...90% (non-condensing)
• Protection class: IP20
• Weight: 0.153 kg
• Product number / SKU: 00002980

Installation & configuration
Power and signal connections are made via screw terminals. Addressing, baud rate and Modbus parameters (8-N-1) are configured per module and stored in internal EEPROM. Follow the manual for addressing, maximum number of modules on a Modbus master interface and safe-state configuration.

Environmental & compliance
Operating temperature 0…50 °C, storage/transport 0…70 °C, relative humidity 10–90% non-condensing. Protection class IP20. Inductive loads should be avoided or suppressed at the source to prevent contact damage and interference.

Ordering information
Reference: romod 4DO-R eco — SKU 00002980 — version without LVB, with status LED.