P-ION Sedona Programmable Controller


P-ION series products are universal programmable controllers that can be used to manage a variety of building systems including heating, ventilation, air-conditioning (HVAC) systems. Basic and advanced control strategies can be programmed by Sedona Framework™  for optimized performance.


Universal Inputs

All universal inputs can be configured as analog or voltage free digital inputs.

Analog inputs are optimized for resistive type temperature sensors (e.g. PT1000) and 0-10 VDC devices. 13 bit A/D converters assure high resolution measurements. For 4-20 mA input signals, external 500 Ohm resistors are required.

All inputs are protected against short circuits to ground and against direct connection up to 50 VAC.


Flex Points

All flex I/O points can be configured as analog output, digital input or pulse input.

Analog outputs are used to control 0(2)-10V valve and damper actuators, humidifiers, frequency drives, etc. Convertor relay boards can be used to drive on/off loads.

All outputs are protected against short circuits to ground and against direct connection up to 50 VAC.


Relay Board Extension

Two relay modules (RK-4) can be connected by ribbon cable to provide a total of 8 additional relay outputs at 10A. Further RK4 relay modules can be driven by flex-outputs to convert analog outputs to relay outputs.



The P-ION can communicate over TCP/IP and/or RS485 busses.



Developed by Tridium, Sedona is the industry's first, open source development framework that provides a complete software platform for developing, deploying, integrating, and managing pervasive device applications. It brings the power of programmable control and the Internet down to edge devices. Sedona distributes decision making control and manageability to any device and brings intelligence and connectivity to the network edge and back.


  • IP based programmable controller for Building Management Systems
  • Implements Sedona Framework™
  • 16 Universal Inputs
  • 16 Flex Input/Outputs
  • Any flex I/O point can be configured as analog output, digital input or pulse input
  • Software based configuration
  • Status LED for all inputs and outputs
  • Real-time-clock with scheduling
  • Upto 8 additional relay outputs via optional relay modules
  • RJ45 Ethernet port
    RS485 port
    USB port (for firmware upgrade)


32 bit microcontroller, 13-bit A/D converter
flash memory
Nominal Voltage
24 VAC +%10-%15, 50/60Hz
Power Consumption
6 VA
Universal Inputs
0(2)-10 VDC
0(4)-20 mA (500 Ohm resistor required)
NTC 10K3A1
Voltage-free contact
Resistance (0-330 kOhm)
Flex Points
Voltage output 0(2)-10 Vdc, 2 mA max
Digital input (voltage-free contact)
Pulse input (max 20 Hz, 50% duty cycle)
(count stored in non-volatile memory)
RJ45 Ethernet Connection
Ethernet 10/100 Base-T
Supports: IP, TCP, UDP, HTTP, Sedona Sox, Modbus TCP, BACnet IP

RS485 Connection

Modbus RTU
Plug-in terminals, max 1 x 2.5 mm²
Individual 0V common terminals for all inputs & outputs.
Individual 24Vac power terminals for 75% of all inputs and outputs.
Dimensions (mm)
157 x 125 x 60 (including terminals)
Mounting 35 mm standard DIN rail mount
Operating temperature range 0..50 °C (32..122 °F)
Non-operating temperature range -25..+75 °C (-13..+167 °F)
Humidity range 5...95 % rh, non condensing
Weight 630 gr (Gross 750 gr)
Degree of protection
IP20, EN 60529