Impulse 3055 - Manual (Page 10)

Card Setup
Sealevel Systems ULTRA-485 Page 7
Connector Pin Assignments
EIA-530
DIP-shunt E4 selects the pin out for the DB-25 connector P3. With the 5
position shunt in the EIA-530 mode, the ULTRA 485 complies with the EIA-
530 pin out with the following signals supported:
EIA-530
E4
SIO-485
Figure 6 - DIP-shunt E4 (EIA-530 Mode)
Signal Name Pin # Mode
GND Ground 7
RDB RX+ Receive Positive 16 Input
RDA RX- Receive Negative 3 Input
CTSB CTS+ Clear To Send Positive 13 Input
CTSA CTS- Clear To Send Negative 5 Input
DSRB DSR+ Data Set Ready Positive 22 Input
DSRA DSR- Data Set Ready Negative 6 Input
DCDB DCD+ Data Carrier Detect Positive 10 Input
DCDA DCD- Data Carrier Detect Negative 8 Input
TDB TX+ Transmit Positive 14 Output
TDA TX- Transmit Negative 2 Output
RTSB RTS+ Request To Send Positive 19 Output
RTSA RTS- Request To Send Negative 4 Output
DTRB DTR+ Data Terminal. Ready Positive 23 Output
DTRA DTR- Data Terminal Ready Negative 20 Output