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Connections and Wiring
15
NI-3101-SIG Signature Series NetLinx Integrated Controller
DB9 Device Port: Connections and Wiring
FIG. 7 shows the connector pinouts for the rear RS-232/RS-422/RS-485 (DB9) Device Ports. These
ports support most standard RS-232 communication protocols for data transmission. This figure gives a
visual representation of the wiring specifications for the RS-232/422/485 Device connectors.
The table below provides information about the connector pins, signal types, and signal functions. This
table’s wiring specifications are applicable to the rear RS-232/422/485 Device Port connectors on the
NI-3101-SIG (Ports 1-6).
Relay Port: Connections and Wiring
Up to 8 independent external relay devices may be connected to the Relay connectors on the device.
Connectors labeled A are for common; B are for output.
Each relay is isolated and normally open.
A metal commoning strip is supplied with each device to connect multiple relays.
FIG. 7
RS-232/422/485 DB9 (male) connector pinouts for the rear Device Ports
RS-232/422/485 Device Port Wiring Specifications
Pin Signal Function
RS-232 RS-422
RS-485
1
RX-
Receive data
X
X (strap to pin 9)
2
RXD
Receive data
X
3
TXD
Transmit data
X
4
TX+
Transmit data
X
X (strap to pin 6)
5
GND
Signal ground
X
X
6
RX+
Receive data
X
X (strap to pin 4)
7
RTS
Request to send
X
8
CTS
Clear to send
X
9
TX-
Transmit data
X
X (strap to pin 1)
5
4
3
2
1
9
8
7
6
Male
DB9 Serial Port
pinouts (male connector)
Pin 2: RX signal
Pin 3: TX signal
Pin 5: GND
Pin 7: RTS
Pin 8: CTS
RS-232
Pin 1: RX -
Pin 4: TX +
Pin 5: GND
Pin 6: RX +
Pin 9: TX -
RS-422
Pin 1: A (strap to 9)
Pin 4: B (strap to 6)
Pin 5: GND
Pin 6: B (strap to 4)
Pin 9: A (strap to 1)
RS-485