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Pin Assignments and Cable Wiring
Female DB9 Connector Pin Assignments
RS-232 Wiring
RS-422 Wiring
RS-485 Wiring
Mini Adapter
The NPort Express DE-311 accepts devices
with both male and female connectors. A
D-shell female serial connector is built-in, and
a DB9 male null-modem adapter is included as
a standard accessory.
If you wish to make your own DB9 to DB9 null-modem (or
cross-over) cable, the pinouts are as follows:
Environmental Specifications
Power requirements
DC 9V to 30V, 300 mA at 9V
Operating temp.
0 to 55◦C
Operating humidity
5 to 95% RH
Dimensions (W×D×H) 90 × 100.4 × 22 mm
3.54 × 3.95 × 0.87 inch
(including ears)
67 × 100.4 × 22 mm
2.64 × 3.95 × 0.87 inch
(without ears)
Surge protection
15 KV ESD for serial port
Magnetic isolation
1.5 KV for Ethernet
Regulatory approvals FCC B, CE B, UL, CUL, TUV
