Impulse 3055 User 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