Hardware reference guide

Quantum Field Bus Modules
254
35013379 02 October 2007
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
1
2
3
4
5
6
7
8
9
RS 232 C
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com