The document describes a wireless peer-to-peer communications system with 3 base units (A, B, C) that can control and monitor a water pump motor and flow rate. Base Unit A receives a 4-20mA flow signal and motion detection input. It communicates with Units B and C to start, stop, and control the pump motor's speed. The MicroLogix PLC receives data from the flow computer and motion detector via Base Unit A to monitor process variables and control the base units using Modbus communications.

1. Base Unit B Analog Transmitter Base Unit C
Wireless peer to peer communications from
Base Unit A to Base Unit B provides the
ability to stop, start and control the rate of
the pump motor with a 4-20 mA output.
12Volt 12Volt
2.5 Amp Fuse
2.5 Amp Fuse
Coil Coil
110VAC to 12VDC 110VAC to 12VDC
Power Supply Power Supply
10 Amp AC 10 Amp AC
Contact Contact
110 VAC 110 VAC
Supply Supply
4-20 mA Control
Motor Motor
Start / Stop Start / Stop
Relay Water Pump Relay Water Pump
Bulk Head Antenna Bulk Head Antenna
Motor AC Peer to Peer Motor AC
Input Input
Peer to Peer Wireless peer to peer communications from
Base Unit A to Base Unit C provides the
ability to stop and start the pump motor.
Omni Antenna
Base Unit A Analog Receiver
The MicroLogix receives serial modbus
data from Base Unit. The MicroLogix
Base Unit A receives a 4-20mA flow rate
monitors the flow computer rate and motion
signal from the water meter to the Analog
detector. Based on these process variables
Receiver. Base Unit A receives a motion
can control Base Unit B and C utilizing
detect contact into the Digital Input.
modbus reads and writes to Base unit A.
Water Flow Meter
2.5 Amp Fuse
4-20 mA Output Modbus Read
110VAC to 12VDC MicroLogix
Power Supply
1100
OleumTech Serial Modbus
110 VAC
Modbus Write
Motion Detection