User Manual
© Sealevel Systems, Inc. 
- 10 - 
ACB-ULTRA.LPCI User Manual 
RS-530A 
Base+5, M3-M0=F, 1111 
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 
DCDB DCD+  Data Carrier Detect Positive  10  Input 
DCDA DCD-  Data Carrier Detect Negative  8  Input 
TXCB TXC+  Transmit Clock Positive  12  Input 
TXCA TXC-  Transmit Clock Negative  15  Input 
RXCB RXC+  Receive Clock Positive  9  Input 
RXCA RXC-  Receive Clock Negative  17  Input 
DSRA DSR-  Data Set Ready Negative  6  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 
TSETB TSET+  Transmit Signal Element Timing Positive  11  Output 
TSETA TSET-  Transmit Signal Element Timing Negative  24  Output 
DTRA DTR-  Data Terminal Ready Negative  20  Output 
LL Local Loopback  18 Output 
RL Remote Loopback  21 Output 










