Figure 49 - New 331-03478-Xxx Microboard - York YVAA Installation Operation & Maintenance

SECTION 7 - OPERATION
YorkTalk2 is connected at TB3
for IPU3
1
2
3
4
Number Description
TP3 +5 V
1
TP2 +3.3 V
2
SD Card
3
JP4, JP5, JP6
Remote Setpoint
4
Jumpers
U5 RTC/BRAM
5

Figure 49 - New 331-03478-xxx microboard

104
19
20
5
6
Number Description
Power LED
6
Status LED
7
Power LED
8
Port 2 RS485
9
Datalog
U23 Port 2
10
RS-485 Driver
18
17
8
7
Number Description
Port 2
11
RX2, TX2
PORT 2 RS-232
12
Printer
VSD RX
13
VSD-TX
U18 VSD
14
RS-485 Driver
U26 PORT 1
15
RS-485 Driver
Form 201.47-ICOM1
Issue date: 17/11/2022
16
15
14
13
12
11
10
9
SC-EQ
Number Description
16 Port 1 SC-EQ
17 TP1 GND
18 TP4+12 V
19 TP5 + 15 V
20 TP10 + 24 V
JOHNSON CONTROLS