Instruction manual

MEGAPLEX Cabling 23
Modular Adaptors
Modular adaptors convert modular jacks to DB-25 (RS-232) connec-
tors. Use the following guide in conjunction with the documentation
provided with the computer equipment to select the correct modular
wiring accessories.
Part No. Connector Connect To
6-wire modular adaptors
210036 DB-25 DCE male terminals, printers,
etc.
210037 DB-25 DCE female terminals, ports, IBM
PC/XT, PS/2, etc.
210026 DB-25 DTE male modems or multiplexer
channels (female DCE)
210027 DB-25 DTE female male DCE devices
(non-standard devices)
210038 DB-9 female IBM PC/AT serial port
8-wire modular adaptors
210051 DB-25 DCE male terminals, printers,
etc.
210054 DB-25 DTE male modems or multiplexer
channels (female DCE)
210055 DB-25 DCE female male DTE device
210067 DB-25 DTE female male DCE devices
210063 DB-9 female IBM PC/AT serial port
Figures 3-10 and 3-11 show the internal wiring of the various modu-
lar adaptors.
When making modular adaptors, the 3K resistor shown may be
eliminated for use with most terminals. The resistor is used to loop
control signals back to the attached device when 4-wire cable is used
and pin 6 is not connected. When using 6-wire cable and there is a
voltage on pin 6 the resistor has no effect and the voltage on pin 6 is
passed through to the attached device.