Hardware manual
Table Of Contents
- Cover Page
- Contents
- About this guide
- Safety Instructions and safety warnings
- Before you start
- Introduction to NION
- Setting up the NION
- Introduction
- Configuration
- Updating the firmware
- Using the front panel
- Using the web interface
- Using XDAB clusters with VLANs and CobraNet
- Introduction
- Important concepts
- Use cases
- Scenario 1 - Basic network
- Scenario 2 - Network using VLAN
- Scenario 3 - Network with VLAN and analog interconnects
- Scenario 4 - Network with VLAN and digital interconnects
- Scenario 5 - Network with an XDAB cluster
- Scenario 6 - Network with VLAN and XDAB
- Scenario 7 - Network with VLAN and XDAB
- Scenario 8 - Network with VLAN and two XDAB clusters
- Scenario 9 - Network with VLAN and three XDAB clusters
- Setting conductor and XDAB priority in NWare
- Further examples
- Troubleshooting
- Connector ports
- Technical specifications
- Reference Information
- Warranty statement
NION Hardware Manual
May 17, 2011 Version 1.6.2a.0 81
RS-422/485 serial port in RS-485 mode
For RS-485 applications the serial port is configured for half-duplex operation. A single data
pair is provided for transmit (Data+) and receive (Data-).
Additionally, there is a 120 Ohm terminating resistor provided for applications that require an
EOL termination. The termination is optional and is accessible by connecting the terminating
pin (TX Terminator) to the positive data (Data+) pin.
Power (+12VDC) is provided on pin 4 and is referenced to ground, pin 5. The power pin is
protected by a self-resetting fuse and is limited to 0.5A, max.
Pin Function Pin Function
1 Data + 6 TX 120 ohm terminating resistor
2 Data - 7 Not used
3 Not used 8 Not used
4 +12 VDC (0.5A) 9 Reserved (no connection)
5 Ground