Telenetics MIU Dial or Leased Line modem with RS-485 Installation & Operation Manual page 10

B A
RS485
TX+ TX- RX+ RX-
Connection
3 & 4 always UP.
1 UP, 2 DOWN when using DB9
for modem configuration.
1 DOWN, 2 UP ~ Modem
connected to RS485. Do not
connect data to DB9
B
4 3 2 1 4 3 2
B A
4 3 2 1 4 3 2 1
A
B
4 3 2 1 4 3 2 1
MIUXXX/485 DIP SWITCH SETUP
CIU Installation, Operation & Diagnostics
Power Connector
LED 1 *
Earth/Digital Ground (Jump pins if req'd) *
RS232 Data Port (DB9 female)
for modem configuration only.
LED 1...
Blinking = POWER ON
Steady = MODEM CONNECTED (CD)
Point-to-Point, 4-Wire: Set Switches B-3 & B-4 DOWN(OFF)
Point-to-Point, 2-Wire: Set Switches B-3 & B-4 UP(ON)
A Line Terminate DC : Set Switches B-1 & B-2 UP(ON)
1
Line Terminate AC : set Switches B-2
For LoopBack Test mode : Set Switches B-3 & B-4 UP(ON)
Multi-drop (Host), 4-Wire: Set Switches B-3 & B-4 DOWN
Multi-drop (Host), 2-Wire: Set Switches B-3 & B-4 UP
Multi-drop (Slave), 4-Wire: Set Switches B-3 & B-4 DOWN
Multi-drop (Slave), 2-Wire: Set Switches B-3 & B-4 UP
Line Terminate
Switch A-1: RTS/CTS Delay: UP = 0 sec; DOWN = 7ms
Switch A-2: DOWN = TXD enables TX +5ms
Switch A-3: DOWN = RTS enables TX
Switch A-4: UP(ON) = TX clamps RXD off (ON) in 2-Wire (half duplex) mode
Edition: June 17, 2003
RJ11 Telco Port *
(* Not on MIU232/485 Converter)
UP(ON)
Set Switch A-4 DOWN(OFF)
: Set Switches B-2 & B-1DOWN (OFF) for
all Slaves except UP(ON) on unit furthest
from the Host
Select only A-2 or
A-3
SHEET TWO