Honeywell 7866 Operation And Maintenance Manual page 23

RS422/485 Modbus RTU Communications
Communications:
Interface (Optional)
Ethernet TCP/IP Communications Interface
(Optional)
Infrared Communications (Standard)
9/06 7866 Triple Range Digital H and CO Analyzer/Indicator - Operation and Maintenance
2 2
Specifications and Model Selection Guide
Baud Rate: 4800, 9600,19,200 or 38,400 baud
selectable
Data Format: Floating point or integer
Length of Link:
2000 ft (600 m) max. with Belden 9271 Twinax
Cable and 120 ohm termination resistors
4000 ft. (1200 m) max. with Belden 8227
Twinax Cable and 100 ohm termination resistors
Link Characteristics: Two-wire (half-duplex),
multi-drop Modbus RTU protocol, 15 drops
maximum or up to 31 drops for shorter link
length.
Type: 10Base-T
Length of Link: 330 ft. (100 m) maximum. Use
Shielded twisted-pair, Category 5 (STP CAT5)
Ethernet cable.
Link Characteristics: Four-wire plus shield, single
drop, five hops maximum
IP Address: IP Address is 10.0.0.2 as shipped
from the Factory
Recommended network configuration: Use
Switch rather than Hub in order to maximize
UDC Ethernet performance
Configuration: Ethernet parameters are
configured via the Process Instrument Explorer.
Email: The capacity to send two Emails is
provided. These must be configured via the
Process Instrument Explorer. It is recommended
that the Real Time Clock option be purchased for
any instrument that needs to send Email.
Ethernet Communications is mutually exclusive
with the Second Current Output.
Type: Serial Infrared (SIR)
Length of Link: 3 ft. (1 m) maximum for IrDA 1.0
compliant devices
Baud Rate: 19,200 or 38,400 baud selectable
13