Hitachi LQE550 User Manual page 37

2 NAMES AND FUNCTIONS OF EACH PART
⑦ Terminating-resistor setup terminals
Used to terminate the modules at both ends of the line. The terminating resistance value
depends on the characteristic impedance of the kind of cable used.
• Strap TA1 and TA2 together if a cable with a characteristic impedance of 150 Ω is used
(leave TB1 and TB2 open).
• Strap TB1 and TB2 together if a cable with a characteristic impedance of 100 Ω is used
(leave TA1 and TA2 open).
Verify the characteristic impedance of a cable by consulting "1.2 Specifications."
Do not strap TA1 and TA2, and TB1 and TB2 together at the same time. Otherwise,
successful communication may be disabled.
⑧ FG terminal
Connect the cable shield to this terminal.
The FG terminal is internally wired to the SHD terminals of LINK1 and LINK2.
For information on how to connect the FG terminal, see "3.3.3 Ground wiring."
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