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RS-‐232 Interface
The RS-‐232 interface appears on a DE9F connector on the rear panel. The connector is wired as
a DCE device. A command interpreter accepts ASCII commands (described in Appendix B) over
the RS-‐232 and Ethernet interfaces. The RS-‐232 port operates at 38.4kbps, 8N1 (8 data bits, no
parity, 1 stop bit), with no handshake.
Pin Description
1
DCD – Internally connected to pins 4 and 6. Does not need to be connected in
most cases.
2
TXD – The JSD-‐60 transmits data on this pin.
3
RXD – The JSD-‐60 receives data on this pin.
4
DTR – Internally connected to pins 1 and 6. Does not need to be connected in
most cases.
5
GND – Signal ground.
6
DSR – Internally connected to pins 1 and 4. Does not need to be connected in
most cases.
7
Internally connected to pin 8. Does not need to be connected in most cases.
8
Internally connected to pin 7. Does not need to be connected in most cases.
9
RI – The JSD-‐60 provides a current limited (900mA) +5V to drive external
equipment on this pin.