Options Expansion Pcb - Viessmann PLC VITOCAL 350-HT PRO Service Instructions For Contractors

Expansion PCB
X20 X21
X30
X29 X28
Fig. 40
Note
The following terminal assignments apply only to the
Vitocal 350-HT Pro.
Terminal assignments
Connection
Digital out X20
Digital out X21
Digital out X22
Digital out X23
Analogue out X24
Analogue in X24
X22 X23
X27 X26 X25 X24
Terminal Address
1 O 256
3 O 257
5 O 258
7 O 259
1 O 260
3 O 261
5 O 262
7 O 263
1 O 264
3 O 265
5 O 266
7 O 267
1 O 268
3 O 269
5 O 270
7 O 271
1 AO 0
3 AO 1
5 AI 0
7 AI 1
PCBs and connection options
Explanation
Shut-off valve, cooling mode
Diverter valve, residual heat
Shut-off valve, dry cooler
Shut-off valve, geothermal probe
Diverter valve, heating/DHW heating
Activation command, part winding,
compressor 1
Activation command, part winding,
compressor 2
Activation command, part winding,
compressor 3
Refrigerant sensor
0-10 V specified set value for heating water
buffer cylinder
0 V = 40 °C
■
10 V = 90 °C
■
55