Dascom T2150 RS232C/TTY Interface Module Operators Manual - Manual (Page 10)

Jumper Function
B5 open*
B5 closed no connection GND and chassis
GND and chassis connected
Slide switches Function
S1 in position 1 T-Loop passive
S2 in position 1 R-Loop passive
S1 in position 2* T-Loop active
S2 in position 2* R-Loop active
DIP switches Function
S3.1 closed / S3.2 open level position RDY
S3.1 open / S3.2 closed* level position RDY\
S3.3 open / S3.4 closed connects RDY or RDY\ with Pin 2 or T-Loop
S3.3 closed / S3.4 open* connects TxD with Pin 2 or T-Loop
S4.1 closed* Signal RDY or RDY\ on Pin 25
S4.2 open* protect resistor in R-Loop is activated
S4.3 open* protect resistor in T-Loop is activated
S4.4 closed in RS232C mode
S4.4 open* in TTY 20 mA mode
Wrong settings/combinations can destroy components
and/or lead to malfunctions (e.g. sporadic transmission
errors)!
STOP
Jumper Settings and DIP Switches
8