Rockwell Automation 1770-HT8 SMART TRANSMITTER - Manual (Page 13)

Introducing the Smart Transmitter
Chapter 1
Interface
1-2
a programmable controller with Allen-Bradley’s pass-through
functionality connected to a host computer on the DH+ network running
application software to initiate communications
Use the RS-232C port (labelled RS-232 in Figure 1.1) with the following:
a host computer using Allen-Bradley DF1 protocol, connected to the
Communications Controller by an RS-232 cable (if the distance is less
than 50 feet)
a host computer using Allen-Bradley DF1 protocol, connected to the
Communications Controller by telephone lines and modems
The Communications Controller requires an external 24 VDC power
supply. It provides a multiplexed, 32 channel interface to the Terminal
Blocks. All of the Remote I/O and RS-232C communications parameters
are set on the Communications Controller using push buttons and a seven
segment LED display.
Figure 1.1
1770ĆHT1 Communications Controller
+ -
24 VDC
90002
POWER
RIO
RS-232
HART
FAULT
VIEW DATA EXIT
SAVE
Push Button Switches
RIO - Connector
RS-232C
Connector
7-Segment LED
Display
Status LEDs
Power Fuse
Power Connector
Connector to Terminal Block(s)
RS-232
HT8/HT16 INTERCONNECT
Parameter # Parameter
Setting
1
User writeable
areas
OPTION DATA
NOTES
OPTN
1
OPTN DATA DATA
2
3
4
5
6
7
8
3.
4.
5.
6.
7.
A.
1.
2.
0.
1 SH 2
RIO
17
SMART TRANSMITTER
COMMUNICATIONS
CONTROLLER