Hardware reference guide

224 35013379 11/2011
Front Panel Connectors
There are three connectors located on the front of the NOL module. These are the
RS-232 configuration port; the primary LonWorks communication port; and the
auxiliary LonWorks configuration port.
RS-232 Configuration Port
This 9 pin, D-shell, female, RS-232 compatible serial port’s attributes are:
z Configured at a fixed rate of 9600 baud, 8 data bits, 1 stop bit, and no parity.
z Used to download configuration and new firmware to the module.
z Supports XMODEM protocol with an ASCII terminal based command processor.
z Can be directly connected to a PC serial communications port.
The following figure shows the 9-pin configuration port.
The following table shows the key to the RS-232C port.
Modbus cables 990NAA26320 and 990NAA26350 are suitable for connection
between the PC serial port and NOL module RS-232 port.
Primary LonWorks Communication Port
This is the primary interface for wiring into a LonWorks network. The connector is a
two-position 5.08 mm screw terminal.
Pin Signal Function
2 RXD Received Data
3 TXD Transmitted Data
5 GND Signal Ground
Black circle = Pin occupied. White circle = N/C