YOKOGAWA F3RS22-0N, Руководство пользователя

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3-5
IM 34M6H21-01E 2nd Edition : Aug, 2001-00
„
Two-Wire System
„
Notes on Wiring
(1) Ground the cable for the twisted pair at two ends (by connecting it to the SHIELD or
the FG terminal). The SHIELD terminal on the F2RS41-0N is connected to the FG
terminal internally.
(2) The F3RS41-0N has a built-in terminating resistor (220
:
), which can be set to a 4-
wire system or a 2-wire system using the terminating resistor selector switch.
(3) For conforming equipment incorporating the F3RS41-0N to CE Marking, use a
shielded cable. Remove the cable cover to expose the wire, ground and secure the
wire with a FG clamp.
CAUTION
Even if the F3RS41-0N module is properly connected, error such as a flashing LED may
still occur because the signal polarities (represented as A/B) are reversed with respect
to that of the remote equipment. In such case, change the connection accordingly.
3.3 Attaching and Detaching Modules
See Section 2.3, "Attaching and Detaching Modules".
SG
RDB
SDA
SDB
RDA
SG
Remote equipment
A
SG
B
Terminating resistor
F3RS41-0N module’s
port terminals
A
B
SHIELD
SHIELD
Set the terminating resistor selector swtich to a 2-wire system.
F3RS41-0N
Screw the
clamp to the
metal plate of
the panel
enclosure to
ground it.
Shielded cable
Remove the cover
and secure with an
FG clamp.
Terminating resistor
(built-in)