User`s manual

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3-22

3.6 Connection

INP-TN5A0202-E

RS-485 connection

1:1 connection

Communication unit This unit

Terminating resistance

Signal Pin No. Signal

SDA 21 TX

SDB 22 RX

RDA 23 SG

RDB 24 A

SG 25 B

FG 26 SG

27 A

RS-422/RS-485 cable

28 B

29 –

30 –

1:N connection

Communication unit This unit 1 This unit 2

Terminating resistance

Signal Pin No. Signal Pin No. Signal

SDA 21 TX 21 TX

SDB 22 RX 22 RX

RDA 23 SG 23 SG

RDB 24 A 24 A

SG 25 B 25 B

FG 26 SG 26 SG

27 A 27 A

RS-422/RS-485 cable

28 B 28 B

29 – 29 –

30 – 30 –

Use the terminal insulation shown as below.

RS-422 : 330Ω ±5% 1/2W

RS-485 : 110Ω ±5% 1/2W

This unit can not make 2 or more different communication connections operate at the same time.

Connecting modules

Connectable modules to the equipment are as follows.

PUMA/B (Control module), PUMV/N/T (Analog I/O module), PUME (Event I/O module)

Max. 32 units are connectable to the equipment. The number of connectable modules varies according to module types.

Refer to user’s manual for each module for details.

When connected modules, power supplies are connected to other modules by connecting power supply lines to the one of

the modules.

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PointPoint