SECTION 5: SYSTEM CONTROL ELECTRONICS
YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, PA • USA • 18974 • P: 281.362.6500 • www.yzsystems.com
Page 34
NJEX ZEO Version 04/13/2021
To Power Up the System
The toggle switch
SW1
located just below center on the right side of the Printed Circuit Board
–
PCB. Turn on the main power switch by toggling the
switch to up position.
After turning on the power switch to the controller, the
controller screen will illuminate and display the Home
Screen.
Communications Interface
There are two methods of communicating information
out of the N-400 controller.
•
Method 1:
utilizes Modbus Communications protocol.
Specifications to permit configuration can be found on
Appendix C: N400 Modbus Specifications.
• Connections are via an RS-485 two-wire connection.
In a safe, nonhazardous area, this may be connected
to a RS-232 converter for interface with a SCADA
system if required.
•
Method 2:
utilizes two output relays. One relay is for
Alarm
Output
and
provides
single
output
communication to indicate some type of alarm has
occurred. The second output relay is for an Odorant
Output Pulse relative to a volume of odorant injected
by the system, refer to the
Figure 17 Controller board component
layout with power switch location highlighted
in a red rectangle.
