Regio Midi manual
Chapter 6
Installation
31
Terminal
Designation
Operation
31
UI1
For switching between heating and cooling on a two-pipe system (change-
over).
A PT1000-sensor is connected between terminals 31 and 41, AGnd.
Measuring range: 0...100°C.
alternatively
For a potential-free contact. A potential-free contact is connected between
terminals 31 and 40, +C.
32
DI1
Occupancy detector. A potential-free contact is connected between
terminals 32 and 40, +C. Closed contact corresponds to occupancy.
alternatively
Window contact (DI). A potential-free contact is connected between
terminals 32 and 40, +C. Closed contact indicates closed window.
See also the section Occupancy detector in the chapter Operating modes.
33
DI2/CI
Regin’s condensation sensor, KG-A/1 (FS). The sensor is connected
between terminals 33 and 41, AGnd.
alternatively
Window contact (DI). A potential-free contact is connected between
terminals 33 and 40, +C. Closed contact indicates closed window.
alternatively
Run indication from e.g. an air handling unit. A potential-free contact is
connected between terminals 33 and 40, +C.
See Table 1, SW4.
40
+C
24 V DC out common for DI and UI (with digital function)
41
AGnd
Analogue ground, reference for AI and UI (with analogue function)
42
A
RS485-communication A
43
B
RS485-communication B
Table 11. I/O connection terminals for models for three-point control
DIP switches (only models without display)
The ON-position is marked on the DIP switch.
ON
OFF
Comment
SW4
DI, window contact.
Closed contact indicates
closed window.
CI, Regin’s condensation
sensor, KG-A/1 (FS).
Function terminal 33,
DI2/CI.
SW5
DO5 activated (FS).
Not permitted.
Shall be ON.
SW6
Not used.
SW7
External, PT1000-sensor. Internal NTC-sensor
(FS).
Temperature sensor.
SW8
NO
NC (FS)
Function terminal 23, UO1
Choosing NC
(factory setting) gives direct action on output UO1, i.e. increasing
signal (longer pulses) on increasing control output. This setting is used when UO1
is connected to a thermal actuator of type Regin RTAM-24 (NC). In the event of a
power cut the valve will close.
Choosing NO
gives reverse action on output UO1, i.e. decreasing signal (shorter
pulses) on increasing control output. This setting is used when UO1 is connected
to a thermal actuator of type Regin RTAOM-24 (NO). In the event of a power cut
the valve will open.
Table 12. DIP switches SW4-SW8