Sensor Wiring
Modline 5
75
Figure 67: Sensor Wiring one 24 VDC Supply and Three Sensors
4.8.1
TSP Terminal Strip Plate DC Power Supply Connections
These instructions are for the Terminal Strip Plate only. For the POI Box, see the separate POI manual
for mounting instructions, wiring requirements, and specifications.
See Section 4.4 to review Terminal Strip Plate enclosure, power supply and ground connection
requirements.
The external 24 VDC power is wired to the right side of the Terminal Strip. Use 22 AWG (0.35 mm²)
wire. Total power supply cable run using 22 AWG (0.35 mm²) wire is 107 meters (350 feet). Shielded
cable is recommended. Paralleling two pairs of 24 AWG (0.25 mm²) cabling is equivalent to using
22 AWG (0.35 mm²) cable.
Connect the positive side of the 24 VDC power source to the +24VDC Terminals.
Connect the common or negative side of the source to the Common Terminal.
4.8.2
Power Supply Common Ground Connection
The Common side of the power source must be connected to earth Ground. If the dc power source
common is not already connected to ground at some point in the system, make the connection at the
Terminal Strip Plate.
The recommended and preferred method of making the ground connection to is to connect the power
supply Common Terminal to Ground through a 100 Ohm 1 Watt fusible resistor. The resistor is inserted
between the Ground Stud and the Common Terminal.
4.9
RS-485 Multi-Drop Network Power Supply and System Wiring
Multiple Modline 5 Sensors communicating via RS-485 with a Host device are installed in a multi-drop
network configuration. The Modline 5 MSI Multiple Sensor Interface, a PC, a PLC or other Control
system are Host devices. A block diagram of a multi-drop network is shown in the adjacent illustration.
It is important to wire the network properly to prevent noise pickup and have reliable operation.
To Modline 5 Sensor
To Modline 5 Sensor
To Modline 5 Sensor
Power Supply
24 VDC
