Wiring The Power Lines And Grounding The Network Equipment In An Fl-Net - Sharp JW-20FL5 User Manual

Chapter 15: Appendix

[3] Wiring the power lines and grounding the network equipment in an FL-net

This section describes how to wire the power lines and ground lines for the network equipment in an FL-
net system.
When wiring power lines and making ground connections, observe the precautions below.
1. Connect the coaxial cable ground terminal to the class D ground that is specially created for the
controller.
2. Connect the frame ground of the hubs for a 10BASE-T system to the class D ground that is specially
created for the controller. Supply power to the hub from an isolation transformer with a static electric-
ity protective function (used to power the controller).
3. Provide an exclusive class D or better ground for the controller FG (frame ground) terminal. Do not
connect this terminal to the controller frame.
4. Connect the FG (frame ground) terminal of FL-net modules to the FG (frame ground) of the controller.
5. Connect the shield ground on the transceiver (AUI) cable to the FG (frame ground) terminal on the
FL-net module.
6. When a transceiver (AUI) needs DC power (12 VDC etc.), provide a stable power supply for exclusive
use by the network, and connect the DC output terminals to the FL-net module. 100 VAC input power
needs to be supplied from the isolation transformer, the same as for the controller.
Isolation
transformer with
static electricity
protective function
Class D ground
Example of how to wire power lines and ground lines for network equipment in the FL-net system
15
Coaxial cable
Hub
100 VAC
100 VAC
15-60
Transceiver Ground terminal
Transceiver
cable
(AUI cable)
12 VDC power
for AUI
Class D ground
exclusively for use
by the controller