IMPORTANT
: See your RST-5003 User Manual for complete Modbus programming
instructions and tropubleshooting tips..
9
General Care
Your RST-5003 is very low maintenance and will need little care as long as it was installed correctly.
However, in general, you should:
•
Avoid applications for which the control module was not designed, such as extreme
temperatures, contact with incompatible corrosive chemicals and fumes, or other damaging
environments.
10
Repair Information
If your RST-5003 control module needs repair, contact us via email, phone, or on-line chat on our
website. We will issue you an RMA number with instructions.
•
Phone: 888-525-7300
•
Email: [email protected]
•
Online chat at www.apgsensors.com
11
Removal Instructions
•
Disconnect power source to control module.
•
Disconnect sensors and network cable to control module.
•
Remove the control module and store it in a dry place, at a temperature between -40° F and
180° F.
Network / Internet Connection
Computer
on
Local
Network
Computer
on
Internet
MNU Ultrasonic Sensors
MP Magnetostrictive Float Level Sensors
4-20 mA Input
(2) Solid State Relays
Modbus
Input
Connection
to
Internet
Server Hosting
Website and
Logged Data
4-20 mA Type Level Sensor
RST-5003
7
Modbus System Wiring Diagrams
NOTE
: Refer to each sensor’s user manual for sensor specific wiring instructions. User
Manuals for all APG sensors and equipment are available at
www.apgsensors.com
.
2
4
V
B
G
N
D
A
(Ethernet Port)
270 Ω
terminating
resistor at
last sensor
Sensor 3
V+
A
B
GND
Trunk Line
Sensor 1
V+
A
B
GND
Sensor 2
V+
A
B
GND
Use shielded cable
Sensor Line Drops
Equivalent 270 Ω
terminating resistor
internal to RST-5003
Note: Terminating resistor size recommended
based on input resistance of RST-5003. Length
of cable and overall impedence of network may
necessitate a different size resistor.
Modbus Daisy Chain Wiring
Modbus System & Network Diagram
Figure 8.1
Figure 8.2
8
Accessing the RST-5003’s Embedded Webpage
Each Modbus sensor attached to your RST-5003 must be configured via the RST-5003’s embedded
webpage before the next sensor can be added. The easiest way to access access the embedded
webpage is to type rst_xxx into a web browser on a computer connected to the same local network
as the RST-5003. xxx represents the numeric portion of the RST-5003’s serial number. See Figures
8.1 and 8.2.
