Andover Controls SCX 920

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SCX 920 Installation Guide Index-3

weight

cabinet 3

wires

gauge for thermistors 7

wiring

AC power connection 16

connecting Infinet cable 18

correct wire gauge for ground 5

counter inputs 21

current outputs 25

current sensors 22

Form C outputs 25

inputs 19

outputs 23

rules for inputs and outputs 20

thermistors 21

tristate outputs 23

voltage outputs 24

voltage sensors 22

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Table of Contents5
Setting up the SCX 920 Controller and Infinet9
Site/System Setup Requirements10
Controller Dimensions and Weight11
Power Requirements11
Cable Limitations11
Lightning Protection12
Building Ground Requirements12
Inspecting the Ground13
Environmental Requirements13
Output Equipment Requirements14
Form C Outputs14
Analog Outputs-Voltage14
Analog Outputs-Current14
Input Circuit Specifications15
Special Factors for Thermistors15
Laying out the Site Setup17
Installing the SCX 92018
Parts Required18
Mounting18
Figure 1. the Front Cover of the SCX 92019
Disabling the Manual Overrides20
Figure 2. Locations of Screw Holes, Other Openings in Cabinet21
Figure 3. the Printed Circuit Board of the SCX 92023
Connecting the Battery24
Connecting the AC Power24
Selecting the AC Input Voltage25
Figure 4. Metal Plate and Screw for Power Supply Wire25
Wiring the Infinet to the SCX 92026
Figure 5. Infinet Cable Wiring26
Wiring the Infinet to the Infinity CX 900027
Setting the Input Reference Resistor Switches27
Wiring the Inputs27
Figure 6. Wiring Diagram for Thermistor Input29
Figure 7. Wiring Diagram for Counter or Digital Input29
Figure 8. Wiring Diagram for Voltage Input30
Figure 9. Wiring Diagram for Current Input30
Wiring the Outputs31
Wiring Tristate Outputs31
Wiring Analog Outputs-Voltage32
Figure 10. Wiring Diagram for Tristate Outputs32
Wiring Analog Outputs-Current33
Wiring Form C Outputs33
Figure 11. Wiring Diagram for Voltage Outputs33
Figure 12. Wiring Diagram for Current Outputs33
Setting the Override Switches34
Figure 13. Wiring Diagram for Form C Outputs34
Connecting Modules to the Expansion Port35
Figure 14. Five Positions on Odd Numbered Override Switch35
Powering up the SCX 92036
Reset Button37
Adjusting the LCD View Angle37
Completing the Installation38
Connecting the Andover Controls Service Tool38
Adjusting Analog Override Values38

Andover Controls SCX 920 - Page 41

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