Viessmann VITODENS 200-W Technical Data Manual page 53

Vitodens 200-W, B2HA 19 to 80 Technical Data
Overview of Electrical Connections, Models B2HA 45, 60 and 80
Legend
1 Outdoor Temperature Sensor
2 Flow Temperature Sensor/Low Loss Header
3 Boiler Temperature Sensor/High Limit Sensor
3A Boiler Temperature Sensor/High Limit Sensor
5 DHW Temperature Sensor
11 Ionization Electrode
15 Flue Gas temperature Sensor
20 Boiler Pump
21 DHW Pump
[21] Pump Output Connection
28/20 Programmable Pump Output*
33 Flow Switch (X2 FOR MODELS 80/100)
35 Gas Valve (X2 FOR MODELS 80/100)
40 Power Supply
40A Accessory Power Output
[53] Powered Accessory Connection
54 Ignition Transformer
96 Powered Accessory Connection
100 Fan Motor
100A Fan Motor Control
111 Not Used
145 KM-BUS
Multi Powered Accessory Connection
156A Switched Output F2
156B Switched Output F1
DE1 Digital Input 1 (Dry Contact)
DE2 Digital Input 2 (Dry Contact)
DE3 Digital Input 3 (Dry Contact)
0-10V 0-10VDC Input
157 Fault Alarm
190 Gas Modulation Coil
190A Gas Modulation Coil (for 80/100)
* See wiring diagram
Boiler Control
A
External Accessory Connection Board
B
Pump Connection Interface
C
Extension Module EA1
D
KM-BUS for External Devices
E
Electrical Junction Box
F
Field Wiring Connections
G
A1 Main Board
A2 Internal Power Supply Unit
A3 Optolink
A4 Burner Control Unit
A5 Programming Unit
A6 Coding Card
A7 Connection Adaptor
A8 LON Communication Module
S1 ON/OFF Switch
S2 Reset Button
X.. Electrical Interface
Wiring Diagram
(continued)
53