Handbook OPTIMA R PC...BM 202207

37/44 | OPTIMA-R-PC...BM
BACnet MS/TP or Modbus RTU with analog setpoint (hybrid mode)
(This operation mode requires parametrization)
∆P control in P
min
… P
max
range and other functionalities with setpoint reading through analog input (terminal 3) and
feedback through analog output (terminal 5). All other variables are communicated through bus (terminals 7, 8) – by
Modbus or BACnet protocol.
Y
U
DC (0) 2 V …10 V
DC (0) 2 V …10 V
D+
D-
GND
2
1 3 6
7
5 8
D+
T
U
/
MP
–
T
+
~
–
T
+
~
Y
-D
Additional functions can be activated by connecting the override inputs z1 and z2.
The priority of these functions is higher than the ∆P modulating operation with analog input.
Override control z1
Contact 11-9 = Motor STOP
Contact 11-10 = Damper OPEN
Override control z2
Contact 12-13 = Damper CLOSED
Contact 12-14 = P
max
11 and 12 without contact = no priority override through z1 or z2
10
9
14
13
12
11
9
1110 12
13
14
15 16
z1
z2 S1
–
T
+
~
–
T
+
~
Priority rule – BACnet / Modbus Control
1. z1
2. z2
3. Bus Watchdog
4. a) adaption (autonomous initializing controller function)
5. b) synchronisation (autonomous initializing controller function)
6. Bus Override
7. Y-Step Control: Close – P
min
- P
max
(through analog input – see wiring for AC/DC 24V Step Control)
8. Y-Modulating: P
min
…P
max
(through analog input – see wiring for Modulating VAV)