Table 10. RS-485 Serial Port Pinout
Pinout Pin Signal
1 No Connect
2 TXD-
3 TXD+
4 No Connect
5 No Connect
6 RXD-
7 RXD+
8 No Connect
9 No Connect
10 Isolated GND
The following accessory is available to connect the RS-485 serial port to a 9-pin DSUB plug.
Notice To ensure the specified EMC performance, you must use an isolated cable
with the RS-485 serial port. The following accessory meets this requirement.
Table 11. RS-485 Serial Port Accessory
Accessory Length Part Number
RS-485, S8 Serial Cable, 10-Position Modular Plug to 9-Pin DSUB
(Isolated)
1 m 184428-01
USB 2.0 Type-A
The USB 2.0 Type-A port implements a USB 2.0 Type-A host and supports common USB
devices such as mass-storage, devices, keyboards, mice, and USB cameras.
The following NI cables with retention are available for the cRIO-904x.
Table 12. NI Cables with Retention for cRIO-904x
Cable Length Part Number
USB Extension with Retention, Type-A Male to Type-A Female,
USB 2.0
0.5 m 152166-0R5
2 m 152166-02
Buttons
The cRIO-904x provides the following buttons.
12 | ni.com | cRIO-904x User Manual
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