System Description
I/O Components
8-12 Model 42i Low Source Instruction Manual Thermo Electron Corporation
1 stop bit
no parity
All responses are terminated with a carriage return (hex 0D)
Refer to Table 8-1 for the DB9 connector pin configuration.
RS-485 Connection The instrument uses a four wire RS-485 configuration with automatic flow
control (SD). Refer to Table 8-2 for the DB9 connector pin configuration.
Ethernet Connection An RJ45 connector is used for the 10Mbs Ethernet connection supporting
TCP/IP communications via standard IPV4 addressing. The IP address may
be configured for static addressing or dynamic addressing (set using a
DHCP server).
Any serial port protocols may be accessed over Ethernet in addition to the
serial port.
External Accessory
Connector
The external accessory connector is not used in the Model 42i Low Source
analyzer.
Table 8-1. RS-232 DB Connector Pin Configurations
DB9 Pin Function
2RX
3TX
7RTS
8CTS
5 Ground
Table 8-2. RS-485 DB Connector Pin Configuration
DB9 Pin Function
2 + receive
8 - receive
7 + transmit
3 - transmit
5 ground
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