BA Intellidrive User’s Manual
Introduction
Version 1.4
Aerotech, Inc.
1-13
1.4.4. COM Port
The BAI is a Data Terminal Equipment (DTE) device. Consequently, the user must
connect to the COM ports with a NULL modem cable or adapter. The COM port is a
standard 9-pin “D” style connector located on the front of the BAI, refer to Figure 1-8. It
consists of two signal lines; transmit (TXD) and receive (RXD); a ground, shield, and a
5V power supply line used to power the Aerotech HT. Table 1-1 contains the connector
pinouts.
Table 1-1.
COM Port Pinouts
Pins
Function
1
Shield
2
Receive (RXD)
3
Transmit (TXD)
4,6,7,8
NC
5
Ground (GND)
9
+5 V
The 5-Volt connection on COM port is for the hand held terminal and is a non-
standard connection.
1.4.5. RS232 Daisy Chain Configuration
When connecting multiple BAIs in a RS232 daisy chain, the units must be connected so
that the transmit (TXD) of unit A connects to the receive (RXD) of unit B, and the
transmit of unit B connects to the receive of unit C. The last unit in the chain must
connect its transmit to the receive of the PC (Figure
1-15). Refer to
Chapter 3: Communication and Commands for setup of the daisy chain configuration.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com