Rockwell Automation 1770-HT8 SMART TRANSMITTER User Manual
Page 113
Product Specifications
Appendix A
A-5
The communications specifications conform to HART Field
Communications protocol.
Method of communication
Frequency Shift Keying (FSK) Bell
202 Modem Standard with respect to
baud rate and digital ”1” and ”0”
frequencies
Baud rate
1200 bps
Digital ”0” frequency
2200 Hz
Digital ”1” frequency
1200 Hz
Data byte structure
1 start bit, 8 data bits, 1 odd parity bit,
1 stop bit
Maximum multidropped devices
15
Maximum process variable per smart device
256
Maximum communication masters
2
HART Communications
Specifications
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