Viessmann PLC VITOCAL 350-HT PRO Service Instructions For Contractors page 54

PCBs and connection options
Main PCB
(cont.)
Connection
Analogue out X6
Analogue out X7
Analogue in X8
Analogue in X9
Universal in X10
Digital in X11
Digital in X12
54
Terminal Address
1 AO 0
3 AO 1
5 AO 2
7 AO 3
1 AO 4
3 AO 5
5 AO 6
7 AO 7
1 AI 0
3 AI 1
5 AI 2
6 AI 3
1 AI 4
3 AI 5
5 AI 6
7 AI 7
1 UI 0
3 UI 1
5 UI 2
7 UI 3
9 UI 4
1 I 112
3 I 113
5 I 114
7 I 115
9 I 116
1 I 117
3 I 118
5 I 119
7 I 120
9 I 121
Explanation
Control signal, EEV
Control signal, IHE
Control signal, mixing valve, low tempera-
ture maintenance
Control signal, mixing valve, high tempera-
ture maintenance
Control signal, mixing valve, DHW heating
Control signal, mixing valve, frost protection
Evaporator inlet temperature sensor
Evaporator outlet temperature sensor
Condenser inlet temperature sensor
Condenser outlet temperature sensor
Suction gas temperature sensor 1
Suction gas temperature sensor 2
Hot gas temperature sensor
Casing temperature sensor
Oil pressure transmitter, compressor 1
Oil pressure transmitter, compressor 2
Oil pressure transmitter, compressor 3
Low pressure transmitter
High pressure transmitter
Operating message, soft starter,
compressor 1
Operating message, soft starter,
compressor 2
Operating message, soft starter,
compressor 3
Winding protection, compressor 1
Winding protection, compressor 2
Winding protection, compressor 3
Compressor 1 safety high pressure switch
Compressor 2 safety high pressure switch
Compressor 3 safety high pressure switch
Emergency stop