Johnson Controls York AYK550 - Analog Input and RS485 Interface Configuration

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Analog Input Configuration
The analog input signal on AYK550 Control Boards is selected with DIP switches.
Examples on selecting the analog input signal are illustrated below.
1. AI1 = Voltage 0 – 10V AI1: OFF
AI2 = Current 0 (4) – 20 mA AI2: ON
2. AI1 = Voltage 0 – 10V AI1: OFF
AI2 = Voltage 0 – 10V AI2: OFF
3. AI1 = Current 0 (4) – 20 mA AI1: ON
AI2 = Current 0 (4) – 20 mA AI2: ON
J1 Jumper Settings
Jumper J1 located at top left corner of logic board.
X1 Identification Hardware Description
28 Screen
29 B (Positive +)
30 A (Negative -)
31 AGND
32 Screen
28 SCR
29 B
30 A
31 AGND
32 SCR
SCR
+
-
GND
RS485 Multidrop application
RS485 interface
Bus termination
OFF position ON position
SCR
+
-
GND
J2
ON
J2
ON
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