The document introduces a new DDC temperature controller, the W500T. It maintains the modularity of the existing W Analog series while implementing additional features like flexible DIN rail mounting and RS485/Modbus connectivity. The W500T has 3 analog inputs, 2 digital inputs, 2 analog outputs, and 2 digital outputs. It is available as a basic or extended version with real-time clock and communication capabilities. The controller can manage up to 4 independent loops for temperature control applications like heating, cooling, humidity, etc. Additional models will be released to control pressure, enthalpy, air quality, voltage inputs, and digital sequencing.

1. CONTROLLI
W500T
- New DDC Temperature Controller -

2. 2
New DDC W500 series
INNOVATION and TRADITION
 With the new W500 line we aim to replace
the existing W Analog series, maintaining
the modularity philosophy and implementing
the overall features. All in a new DDC
hardware.
 Additional features such as flexible DIN rail
mounting and RS485 /ModBus connection
to a supervisory system, have been
implemeted.
 Modularity is a strenght that we want to
provide again to our customers thus allowing
them to integrate more devices into a flexible
structure where both air and water are to be
controlled.

3. 3
New DDC W500 series
W500T: P or P+I Temperature Controller
The new temperature controller consists of:
 3digit ½ display (with sign and comma)
 Flashing leds
 Diaphragm keys
 Standard ISO – DIN rail mounting
• Power Supply : 230 Vac
• Input : 3 Analogue and 2 Digital
• Output : 2 Analogue and 2 Digital
• Models available :
 BASIC VERSION
 EXTENDED VERSION including Real Time Clock and
RS485 / ModBus
• W500T controller for temperature is the first to be
released: it includes all the application available with the
existing WT, WM, WI, WS, WF controllers.

4. 4
New W500 series: Modularity

5. 5
New W500 series: Functionality
Models:
 W500T = BASIC VERSION (hardware for temperature control)
 W500TMB = EXTENDED VERSION: includes Real Time Clock and RS485 / ModBus
connection
Real Time Clock (“RTC”):
 2 daily programs and weekly program. It includes 3 functioning modes:
– ON (NM)
– OFF/Antifrost (FA)
– Reduced (RF).
Internal communication bus (LinkBus):
 Built-in internal communication bus (provided with all models) permits to share sensors and
parameters between controllers. It’s called “Link” and allows the installer to save on
sensors (e.g. only one outside compensation sensor for 4 controllers);
 In case you wish to connect more controllers together (up to 4 controllers with internal
LinkBus) only one needs to be with Real Time Clock;
 All sensors are PTC type.
External communication Bus:
 Model W500TMB is equipped with RS485 for a connection to a Supervisory through
ModBus protocol. In case more controllers are connected with internal LinkBus, only one
needs to be provided with RS485 / ModBus.

6. 6
W500: Internal structure
SR SL SC DI1 DI2
AO1
AO2
DO1
DO2
Analogue LOOP 1
Analogue LOOP 2
On/Off LOOP 1
On/Off LOOP 2
Using a new W500 controller it’s the
equivalent of having 4 different
controllers - 2 with modulating output
and 2 with ON/OFF output –
indipendent from eachother.
Each sensor (SR, SL, SC) will work with
any of the four setting parameters.
Digital Inputs (DI1, DI2) can be used for
various functions, depending on the
functioning mode that has been
selected.
SR = Regulation Sensor; SL = Limit Sensor; SC = Compensation Sensor
DI = Digital Input; DO = Digital Output; AO = Analogue Output
4
loops
available !

7. 7
New DDC W500 series: Inputs
INPUTS
 3 Analog Inputs for PTC type sensors
– Control sensor input, -50°..150°C (SR)
– Limit sensor input, -50°..150°C (SL)
– Compensation sensor input or remote set, -50°..150°C (SC)
 If limit and compensation sensors are not connected, their functions will be
automatically disabled and will not be displayed on LCD (but they can be
shared through LinkBus)
 Digital inputs are volt free contacts. Settings available: Stop Antifrost ,
Power on / Power off, Summer/Winter, etc.
 When more controllers are connected through LinkBus, sensors can be set
via display (menu)
 remote set-point control can be obtained by means of a RM potentiometer
connected instead of the Compensation Sensor

8. 8
New DDC W500 series : Output
OUTPUT
 The 2 Analogue Outputs are 0 –10 Vdc type; Max output current is 10mA.
 Analogue output has 4 possible functions
– Heat ( 0..10Vcc)
– Cool (0..10Vcc)
– Heat/Cool with Summer / Winter change over
– Heat/Cool in sequence (1-5Vcc and 6–9Vcc)
 The 2 Digital Output are line Relays 250V 3(8)A:
– Could be used at the same time of Analogue control depending on customer’s
needs such as: Pump or Fan activation, Dampers, “On/Off” programmable
strategies
– they will use the same sensors of analogue loops
– An alternative on-off action can be activated according to available digital input
status (when properly set)
 Possibility to disable functions I and use W500T only as P

9. 9
New W500 series: Analog Loops
• Heating loop with possibility to have a maximum
or minimum limit functions and compensation Set
T
Vdc
• Cooling loop with possibility to have a
maximum or minimum limit functions and
compensation Set
T
Vdc
• Heating/Cooling Loop with Summer/Winter
changeover and possibility to have a
maximum or minimum limit functions and
compensation Set
T
Vdc
• Heating/Cooling Loop in sequence with
possibility to have a maximum or minimum
limit functions and compensation Set and
output 1-5Vdc & 6-9Vdc
T
Vdc

10. 10
New W500 series : Digital Loops
• Output driven by events with possibility to time
in advance or delay
• Heating/Cooling Hysteresis with Summer/Winter
changeover with possibility to have a maximum
or minimum limit functions and compensation
Set
T
ON
OFF
• Cooling Hysteresis with possibility to have a
maximum or minimum limit functions and
compensation Set
T
ON
OFF
• Heating Hysteresis with possibility to have a
maximum or minimum limit functions and
compensation Set
T
ON
OFF

11. 11
Sensors
All sensors are PTC (1 kOhm)
 SPTC-A: room sensor
 SPTC-A5: room sensor with set point knob
 SPTC-E: outside sensor
 SPTC-F: strep on sensor
 SPTC-V: duct fast sensor

12. 12
Applications
Heating all outside air, winter room temperature control

13. 13
Applications

14. 14
Applications

15. 15
Applications

16. 16
Applications
Cooling
production
Heating
production
V1
V2
M1
W500T
AO1 AO2 DO2
DO1
RS
LS
CS
DI2
DI1
S3
S4 On/
Off Action
P1
Floor Heating
S1
M1 : Three way motorized valve
V1 : Heating motorized Valve
V2 : Cooling motorized valve
S1 : Outdoor temperature sensor
S3 : Flow temperature sensor
S4 : Floor temperature/HR sensor
P1 : pump circulation
Outside Temp.
AO1, AO2 : Analog Output
DI1, DI2 : Digital Input
DO1, DO2 : Digital Output
RS : Main control Sensor
LS : Linit Sensor
CS : Compensation Sensor
Room
Sensor

17. 17
Applications

18. 18
AHU + sanitary water
W500T
Applications

19. 19
Next steps
• Models described below will follow:
 W500H include functions of existing WH (WI, WS) : Humidity
 W500P include functions of existing WP (WI, WS) : Pressure
 W500E include functions of existing WE (WI, WS) : Enthalpy
 W500Q include functions of existing WQ (WI, WS) : Air Quality
 W500V include functions of existing WV (WI, WS) : Active input (0-10Vdc)
 W500D include functions of existing WD (WI, WS) : Digital sequencer 4 digital output