YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, Pennsylvania • USA • 18974 • P: 281.362.6500 • www.yzsystems.com
Page 23
NJEX EUR ver. 08-2021
Section 4: System Control & Electronics
Communications Interface
There are three methods of communicating informa-
tion out of the N-300 controller.
•
Method 1,
utilizes Communications Modbus pro-
tocol. Specifications to permit configuration can
page 108, Appendix B: N300 Modbus
.
•
Method 2,
utilizes the Sentry Software installed on
a computer. In this mode the computer can commu-
nicate with the NJEX system & obtain information,
or the NJEX system may be configured to notify the
computer and provide it with information.
• Connections for Method 1 or 2 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 3,
utilizes two output relays. One relay is for
Alarm Output
, and provides single output commu-
nication to indicate some type of some alarm has
occurred with the odorizer. The second output relay
is for a
Scaled Pulse
relative to a programed vol-
ume of odorant injected by the system,
Wiring Control Document on page 117 in Appendix
Comm-Link Configuration
The NJEX system may be communicated to through
on one or two available RS485 communication ports.
The N-300 Modbus specification can be found on
8, Appendix B: N300 Modbus Specifications
.
Summary of Contents for NJEX 6300G
Page 1: ...NJEX 6300G 7300G N A T U R A L G A S O D O R I Z A T I O N S Y S T E M...
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Page 3: ...NJEX 6300G 7300G Instruction Operating Manual Version 08 2021...
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