Rockwell Automation 1770-HT8 SMART TRANSMITTER - Manual (Page 51)

Installing the Smart Transmitter Interface
Products
Chapter 2
2-26
Figure 2.21
Three Wire Connection to IBM Computer (25 pin)
1
TXD 2
RXD 3
GND 7
3 RXD
2 TXD
7 GND
Shield
90005
Female 25 pin connector
to Communications Controller
Female 25-pin connector
to Computer
Figure 2.22
Three Wire Connection to IBM Computer (9 pin)
1
TXD 2
RXD 3
GND 7
2 RXD
3 TXD
5 GND
Shield
90006
Female 25 pin connector
to Communications Controller
Female 9-pin connector
to Computer