GSE 60 SERIES Technical Reference Manual page 511

Options 13-35
F D (4- )
ULL UPLEX WIRE
Removing jumpers 1, 2 and 4 on the RS-485 option board requires that
the transmit and receive lines be wired independently of one another. The
RX B(+) and RX A(-) receive lines must be wired in parallel to the next
device's RX B(+) and RX A(-) receive lines , and the TX B(+) and TX A(-)
transmit lines must be wired in parallel to the next device's TX B(+) and
TX A(-) transmit lines.
In order to connect network lines in parallel from device to device it is
necessary to position two wires into the same lever socket. This requires
that the wire used to build the network be 24AWG or smaller to allow both
wires to fit into the same lever socket.
B H D F D
OTH ALF UPLEX AND ULL UPLEX
The network boards on both end-points should install jumper 3 on the RS-
485 option board to engage the 120 Ω termination resistor (R8). The
boards between the two end-points should remove jumper 3 on the RS-
485 option board.
The isolated ground (ISO GND) should be connected in parallel from unit
to unit. A shielded twisted two pair cable is recommended throughout the
network.
Figure 13-18: Half Duplex Wiring Schematic
60 Series Technical Reference Manual