Owner`s manual

M SERIES DAC

CABLING

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eight jumper locations for DCD status selection. Jumpers (JP5,JP7,JP9, & JP11) are

used to configure DCD as an output for pin 2 for each port of the module. Jumpers

(JP6,JP8,JP10, & JP12) are used to configure DCD as an input for pin 7 for each port

of the module. Each port is configured from the factory with pins 2 and 7 as ground.

1. V75 (See Figure 29)--- Each port's jumper position for "ground" connects

the center pin and the pin located closest to the RJ-45 connector.

2. V74 (See Figure 30)--- Each port's jumper position for"ground" connects

the center pin and the pin located on the right with the RJ-45 connectors facing you.

In both V74 and V75 applications use BayTech adapter, part number 25FRJ45PC-1

or 9FRJ45PC-1.

B. DCD "IN"---The DCD "IN" jumper selection is selected in applications where the

individual port of the V74 or V75 will be communicating with a modem. To change

the EIA-232 pin/signal definition for a V74 or V75 port to have pin 7 configured for

DCD "IN" you must change the location JP6 for port 4, JP8 for port 3, JP10 for port

2, or JP12 for port 1.

1. V75 (See Figure 29)---Install the two position jumper so that it connects

the center pin and the pin farthest away from the RJ-45 port. Do not move the other

jumpers.

2. V74 (See Figure 30)---Install the two position jumper so that it connects

the center pin and the pin located on the left of the common pin with the RJ-45 port

facing you. Do not move the other jumpers. In these two applications use BayTech

adapter, part number 25FRJ45MD-4.

C. DCD "OUT"---The DCD "OUT" jumper selection is used in applications where

an individual port of the V75 will look like a modem connection if a computer or

terminal is connected to the port. Some terminals and popular communications

software packages require that DCD is "high" for a connection to be completed. To

change the EIA-232 pin/signal definition for a V74 or V75 port to have pin 2

configured for DCD "OUT" you must change the location of JP5 for port 4, JP7 for

port 3, JP9 for port 2, or JP11 for port 1.

1. V75 (See Figure 29)---Install the two position jumper so that it connects

the center pin and the pin farthest away from the RJ-45 port. Do not move the other

jumpers.

2. V74 (See Figure 30)---Install the two position jumper so that it connects

the center pin and the center pin and the pin located on the left of the common pin

with the RJ-45 connectors facing you. Do not move the other jumpers. In this

application use BayTech adapter, part number 25FRJ45PC-3 or 9FRJ45PC-3.

IMPORTANT: If the module is installed in the base unit chassis, remove

power from the unit by positioning the On/Off switch to "0" (off) and

unplugging the power cord from the AC outlet. Remove the module by