8. Connections of I/O Interface
8.4 Connecting with Card-sized I/O Card
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8.4.4 Precautions for Wiring
(1) Connection of terminator
A terminator is required between the communication signal cables(TXRX,TXRX*) of the card-sized I/O.
Connect a terminator to the card-sized I/O card connector PCB signal line as shown below.
Recommended terminator: 100
Ω
±1% 1/4W (RN14C2E101F) [Koa Denko]
(Example) When four connectors are installed on the card-sized I/O card connector PCB.
TXRX
TXRX*
B2
A2
100
Ω
NC control
unit
(RIO1/2/3)
Connector (CF30/CF36) on card-sized I/O card
connector PCB
(2) Shield treatment of communication signal cable
Because the card-sized I/O card communication cables (TXRX, TXRX*) communicate at a high speed,
they must be wired separately from other signal cables. Shield each end of the signal with a GND pattern
as shown below, and ground at several places.
TXRX
TXRX*