Telenetics MIU Dial or Leased Line modem with RS-485 Manual

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CIU Installation, Operation & Diagnostics Edition: June 17, 2003

SHEET TWO

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)

Line Terminate DC : Set Switches B-1 & B-2 UP(ON)

Line Terminate AC : set Switches B-2 UP(ON)

For LoopBack Test mode : Set Switches B-3 & B-4 UP(ON)

Set Switch A-4 DOWN(OFF)

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 : Set Switches B-2 & B-1DOWN (OFF) for

all Slaves except UP(ON) on unit furthest

from the Host

Switch A-1: RTS/CTS Delay: UP = 0 sec; DOWN = 7ms

Switch A-2: DOWN = TXD enables TX +5ms Select only A-2 or

Switch A-3: DOWN = RTS enables TX A-3

Switch A-4: UP(ON) = TX clamps RXD off (ON) in 2-Wire (half duplex) mode

4 3 2 1

Earth/Digital Ground (Jump pins if req’d) *

LED 1...

♦ Blinking = POWER ON

♦ Steady = MODEM CONNECTED (CD)

RJ11 Telco Port *

Power Connector

LED 1 *

RS232 Data Port (DB9 female)

for modem configuration only.

RS485

Connection

TX+ TX- RX+ RX-

(* Not on MIU232/485 Converter)

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

MIUXXX/485 DIP SWITCH SETUP