A - product specifications, Product specifications – Rockwell Automation 1770-HT8 SMART TRANSMITTER User Manual
Page 109

Appendix
A
A-1
Product Specifications
RSĆ232 Interface
Start Bits
1
Data Bits
8
Parity
None, Even, Odd
Stop Bits
1
Baud Rates
300, 600, 1200, 2400, 4800, 9600, 19200
Connector
DB-25P (male)
Output
RS-232C
Protocol
Allen-Bradley DF1
RIO Interface
Baud Rates
57600, 115200, 230400
Rack Size
1/4 rack
Connector
Phoenix COMBICON header and plug – 3 position
Cable
Standard “blue hose” shielded twisted-pair cable
(Belden 9463)
Cable Length
10,000 ft. (3,048 m) - 57.6 kbaud
5,000 ft. (1,524 m) - 115.2 kbaud
2500 ft. (762 m) - 230.4 kbaud
Output
Allen-Bradley RIO
Termination
150 or 82 ohm resistors on last nodes of RIO link
(depending on baud rate)
Protocol
Allen-Bradley RIO
Terminal Block (1770ĆHT8/16) Interface
Channels
supports 32 multiplexed HART 4-20 mA current loops
Connector
Phoenix COMBICON header and plug – 17 position,
12-24 AWG
Cable
maximum 1000 ft. (304.8 m) standard shielded cable
with 8 twisted pairs (Belden 9508 or Belden 85168)
Output
24 VDC, differential channel select, differential
transmit enable, differential half-duplex HART
transmit/receive
Protocol
HART Master Device –
Revision 7.1 HART Physical Layer Specification,
Revision 7.0 HART Data Link Layer Specification
Communications Controller
(1770ĆHT1)