Two Technologies TechTerm TT1R2, Technical Reference Manual

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Operation 6
Cable and Power Connections
Internal Communication Devices
The following table lists the internal interface devices used in the TechTerm.
Table 2-2: Interface Devices
Interface Manufacturer Device
RS-232 Linear Technology LT1281
RS-422 Linear Technology LTC490
Signal and Pin Assignments
Modular Interface Connector
Figure 2-2 depicts the standard six-pin modular interface connector found on the TechTerm.
Table 2-3 describes its signal and pin assignments.
Warning: Use the six-pin modular receptacle for compatible serial devices only. Despite its
physical similarity to modular telephone connectors, it is not compatible with
telephone lines or signals. Connecting the terminal to a telephone line will damage it
and void the warranty.
Figure 2-2: Modular Interface Connector
123456
Table 2-3: Modular Interface Connector Signal and Pin Assignments
Pin RS-232/CMOS/TTL RS-422
1 + Supply to terminal + Supply to terminal
2 Handshake-In to terminal + Data-In to terminal
3 Handshake-Out from terminal + Data-Out from terminal
4 Data-In to terminal - Data-In to terminal
5 Data-Out from terminal - Data-Out from terminal
6 Common Common
Viewed facing