Table 17. Serial-B Connector Pin-Out - Penguin Computing Relion 1900e Technical Manual

** Pin 7 of the RJ45 Serial A connector is configurable to support either a DSR (Default) signal or a DCD
signal. Pin 7 signals are changed by moving the jumper on the jumper block labeled "J4A4", located behind
the connector, from pins 1-2 (default) to pins 2-3.
Serial-A configuration jumper block (J4A4) setting:
Serial-B is an internal 10-pin DH-10 connector labeled "Serial_B".
The Serial B connector has the following pin-out.
Revision 1.0
Relion 1900e/2900e Manual

Table 17. Serial-B Connector Pin-out

Signal Description Pin#
DCD 1
SIN 3
SOUT 5
DTR 7
GROUND 9
Serial B
DH-10
Pin# Signal Description
2 DSR
4 RTS
6 CTS
8 RI
KEY
52