
Defining the FC-21ETH, FC-22ETH and
FC-24ETH Ethernet Controllers
Figure 6 defines the rear panel of the FC-24ETH.
Figure 6: FC-24ETH Ethernet Controller Rear Panel
SERIAL 3-pin
Terminal Block
Connect to an RS-232 or RS-485 controlled device.
When connecting as an RS-485 port, the connections
are G, B, A in place of G, Rx, Tx
RS-232/2 3-pin
Terminal Block
Connect to an RS-232 controlled device
RS-232/2 3-pin
Terminal Block
Connect to an RS-232 controlled device
RS-232/2 3-pin
Terminal Block
Connect to an RS-232 controlled device
Connect to the PC or other controller directly or via a
LAN (see Section 6.1)
F/W UPGRADE USB
Connector
Connect to a PC to upgrade the firmware
Terminates the RS-485 bus, (see Section 8.3).
Slide down when this is the last device on an RS-485
bus.
Slide up when this device is not the last device on an
RS-485 bus
Selects either RS-232 or RS-485 serial communication
for the SERIAL port, (see Section 8.3).
Depress for RS-485 serial communication.
Release for RS-232 serial communication
Connect to the 5V DC power supply, center pin
positive
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