Minebea Intec PR 5230 - 7.6 Finding and connecting the device automatically in the network

Switch S401 Block diagram RS-485
The switch S401 is located in the
device on the main board.
Factory setting:
S Function Settings for RS-485
1 Rx bus termination OFF: not connected
ON: (RxA 120 Ω RxB)
2 Rx pull-up resistor OFF: not connected
ON: (RxB 1K6 Ω +V)
3 Rx pull-down resistor OFF: not connected
ON: (RxB 1K6 Ω -V)
4 Tx/Rx bus termination OFF: not connected
ON: (TxA 120 Ω TxB)
5 Change-over 2-/4 wire OFF: 4-wire ON: 2-wire
6 Rx enable (unblock) OFF: Rx disabled (blocked);
if Tx enabled (unblock):
S7 must be "ON".
ON: Rx always enabled (unblocked):
For 4-wire S7 must be OFF.
7 Tx enable (unblock)/Rx disa-
ble (block) (2-wire)
OFF: S6 must be "ON". ON: S6 must be "OFF".
8 n.c. no function
Transmitter in eld housing PR 5230 4 Device installation
Minebea Intec EN-44