York YVAA Style A - New Microboard Component Identification; Microboard Connector and Test Point Layout

JOHNSON CONTROLS
108
SECTION 7 - OPERATION
Form 201.28-NM1.1
Issue date: 08/06/2021
Figure 27 - New 331-03478-xxx microboard
20
19
18
17
14
13
11
12
8
7
1
2
3
6
5
4
9
15
10
16
LD19331
Number Description Number Description Number Description Number Description
1
TP3 +5 V
6
Power LED 11
Port 2
RX2, TX2
16
Port 1
Native BAS
(BACnet and
N2)
2
TP2 +3.3 V
7
Status LED 12
PORT 2 RS-232
Printer or Modbus
17 TP1 GND
3
SD Card
8
Power LED 13
VSD RX
VSD-TX
18 TP4+12 V
4
JP4, JP5, JP6
Remote Setpoint
Jumpers
9
Port 2 RS485 to
E-Link/SC-EQ
or Modbus
(RTU)
14
U18 VSD
RS-485 Driver
19 TP5 + 15 V
5
U5 RTC/BRAM
10
U23 Port 2
RS-485 Driver
15
U26 PORT 1
RS-485 Driver
20 TP10 + 24 V