Rockwell Automation 1770-HT8 SMART TRANSMITTER - 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)