172001UA
2-3
I
Power
T
S
R
J3
C
Factory Test Straps
Must be Installed for Unit To
Operate Correctly
J1 (RS-232) Is a DTE, and
MUST Connect to a
Modem (DCE)
J2 (X.21) Is a DTE, and
MUST Connect
to a Modem (DCE)
J2
X.21
J1
RS-232
JP3
JP2
JP1
JP4
SW1
X.21 INTERFACE
DCE
DTE
Signal
to
Chassis
Ground
SW2
SW3
JP5
JP6
DTR /RTS
DCD / CTS
SW4
SW5
DCE
DTE
V.24 INTERFACE
Figure 3
(Factory Default Setting)
Equipment Grounding
JP4 provides grounding interconnection in those systems requiring a
connection between Frame Ground and Signal Ground. If signal ground
and chassis ground interconnection is desired, install the jumper on JP4.
LED Indicators
The Following LED indicators are provided for diagnostics: Power, Transmit
Data (T), Receive Data (R), Control (C), Indicate (I) and Signal Timing (S).
Factory Test Straps
The Factory Test Straps JP1, JP2 and JP3 must be installed for proper
operation of the interface converter.
Signal Crossover
JP5 controls selection of DTR or RTS as the active V.24 control signal.
JP6 controls selection of the DCD or CTS as the active V.24 control signal.
The selection of DTE or DCE on the two interfaces will determine which
X.21 signal is connected to which V.24 control signal.
