RSO 4 - Road signal output

4-Channel AC Output Unit with Voltage and Current Measurement

   

RSO 4 is a 4-channel AC output unit primarily designed for control of traffic light signals (heads) in traffic control systems: intersections, tunnels, toll stations, parking sites, construction sites etc.


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RSO 4 is a 4-channel AC output unit primarily designed for control of traffic light signals (heads) in traffic control systems: intersections, tunnels, toll stations, parking sites, construction sites etc. Supported are all types of common traffic heads (semaphores): standard light bulbs (up to 200W), halogen lamps with transformers and LED traffic lights (with currents as low as 5 mA).

Supported are all types of common traffic heads (semaphores): standard light bulbs (up to 200W), halogen lamps with transformers and LED traffic lights (with currents as low as 5 mA).

Each output is independently monitored for voltage and current. The voltage range is up to 290V AC with resolution 0.1 V. The current measurement range is up to 1A with 1 mA resolution (and up to 2A with lower resolution). Both measurements can be used for safe and accurate determination of various failure modes of traffic signal (bulb failure, output failure, conflicting voltage...).

A powerful micro controller inside RSO 4 unit is used for communication with CAN and RS-485 bus. An open and fully documented protocol is implemented for EN50556-compliant safe use in road traffic signal systems. Modbus RTU is also implemented for easy interfacing to PLC-based systems.

Up to 24 modules (with 96 outputs) may be controlled on a single RS-485 channel. There is no inherent limitation on a number of communication channels which can be used in system.

The module is EN 50556 compliant for safe use in road traffic signal systems.

RSO 4 has built-in standalone special variants, such as flashing unit in master-slave configuration with fault indication.

The module may also be used as a general purpose AC output unit with current and voltage measurement for various low-current applications, such as low power motor drives, lightning, home automation controllers, machine automation controllers, etc.

RSO 4 can be used for the following:

  • intersection controllers (traffic lights)
  • tunnel control systems
  • parking systems
  • home automation
  • flashing system in master-slave configuration
  • lighting
  • machine automation
  • home automation
  • high channel density,
  • simple DIN rail mounting,
  • PLC-compatible,
  • detects all output errors through voltage and current control,
  • synchronous command to all connected units,
  • very versatile,
  • standards compliant.

Mechanical and electrical

Dimensions (mm) 120 x 100 x 35
Installation DIN rail mounting (EN 60715)
Controller interface connectors top side, detachable, 0.7 mm 2 connectors for easy-chaining
AC output connector bottom side, detachable
Isolation hot-to-cold side 1000 V
Indicators         4 LEDs (red, yellow, green, blue)

 

 Environment

Operating temperature -25 .. +75ºC
Humidity 5%.. 95% non-condensing

 

 

Communication

Interface RS-485
Baud rate 9600 – 115.200 bps
Protocol OpenRSO, Modbus/RTU
Address selection 0 .. 99 (2 rotary decimal switches)

 

Electrical, cold side

Voltage 24V DC, regulated
Power consumption 2.5 W max
Digital inputs 2 (FAIL and DIO)
Digital outputs 1 (DIO)

 

Mechanical, cold side

Terminal capacity       0.5 to 1.5 mm2

 

Outputs, hot side

Number of channels 4 (R, Y, G, Aux) 
Voltage measurement 0 – 290V AC (rms, 50Hz), 5% 
Current measurement 0 – 1 A 5%, 2A 10% (rms) 
Power measurement 0 – 290 W, 5% 
 Minimum load 3 W (resistive) 
 Maximum sustained load 460 W (resistive) 
 Minimum turn-on current 13 mA (rms) 
 Output type solid-state 
 Current capability (per module) 2A sustained, 2.5A max. 
 Current capability (per output) 0.5A sustained (all outputs active)1A sustained (2 out of 4 outputs active) 
 Fuse protection 2.5 A, type F 
 Nominal voltage 24V AC - 260V AC(rms), 50 Hz (±4%) 
 Maximum switch temperature 105ºC 
 Minimum switch temperature -25ºC 
 Breakdown input voltage 600 V (peak) 

 

Mechanical, hot side

Terminal capacity 1.5 to 2.5 mm2 

 

 

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