Modular Adaptors - Equinox Systems MEGAPLEX Hardware Reference Manual

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.
6-wire modular adaptors
210036
210037
210026
210027
210038
8-wire modular adaptors
210051
210054
210055
210067
210063
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.
MEGAPLEX Cabling
Connector
DB-25 DCE male
DB-25 DCE female
DB-25 DTE male
DB-25 DTE female
DB-9 female
DB-25 DCE male
DB-25 DTE male
DB-25 DCE female
DB-25 DTE female
DB-9 female
Connect To
terminals, printers,
etc.
terminals, ports, IBM
PC/XT, PS/2, etc.
modems or multiplexer
channels (female DCE)
male DCE devices
(non-standard devices)
IBM PC/AT serial port
terminals, printers,
etc.
modems or multiplexer
channels (female DCE)
male DTE device
male DCE devices
IBM PC/AT serial port
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