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WIRING
REMARKS
When performing online exchange
The built-in terminating resistor can not be exchanged online since the terminating resistor is on the FR-A7NC board and
disconnected when the terminal block is removed from the FR-A7NC connector for communication. When changing the FR-
A7NC online, connect a terminating resistor supplied with a programmable controller master module to the FR-A7NC after
modifying it and do not use the internal terminating resistor (SW2 1-OFF, 2-OFF).
Connection with the terminating resistor
Connect the terminating resistor between terminals
DA-DB of the FR-A7NC at the end.
Modify the terminating resistors supplied with the
programmable controller to use.
When a resistor is not supplied with the master
module, use a resistor with 110Ω 1/2W available on the market.
(1) Maximum number of units connected to one master station (CC-Link Ver.1.10)
42 units (when connections are inverters only)
If any other units are included, the number of stations occupied depends on the unit
and therefore the following conditions must be satisfied:
{(1 × a) + (2 × b) + (3 × c) + (4 × d)} ≤ 64
a: Number of units occupying 1 station
b: Number of units occupying 2 stations d: Number of units occupying 4 stations
{(16 × A) + (54 × B) + (88 × C)} ≤ 2304
A: Number of remote I/O ≤ 64
B: Number of remote device stations ≤ 42
C: Number of local, standby master and intelligent device stations ≤ 26
14
Tube
Cut
Cut the tube
c: Number of units occupying 3 stations
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