Electroline Control Unit IV - Table B-4: RS-232 Cable with Male and Female DB-9 Connectors

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Cable Assemblies Control Unit IV Reference Manual

B-4 529-0004 Ver.3

RS-232 cable with 9-pin connectors

Note that COM 3 is a female DB-9 connector, wired as a DCE device. If a DTE device such

as a computer is connected to this port, use an RS-232 cable to ensure that the signals shown

in Table B-4 are assigned to the correct pins. If another DCE device is connected to this port,

you must use a null modem cable with DB-9 connectors (see section B.2.2).

Table B-4: RS-232 cable with male and female DB-9 connectors

Male DB-9, to be

connected to the

Control Unit’s

COM 3 (DCE)

Female DB-9, to be

connected to the host

computer’s port (DTE)

Flow Pin Signal Pin Flow

Output

2 RX 2

Input

3 TX 3

Output

5 Ground 5

Pins 1, 4 and 6-9 are not used. Note that if you use a cable with only three wires (pins 2,

3 and 5), then you will not be able to use hardware flow control on the connection.