MODEL: 54U

54U SPECIFICATIONS

ES-6487 Rev.10 Page 7/10

http://www.m-system.co.jp/

T3

T4

T2

T1

Term.

Resist.

+

–

Shielded Twisted-pair Cable

V(–)

U(+)

DO/PO–

DO/PO+

DO/PO–

DO/PO+

DI –

DI +

DISCRETE

INPUT

DISCRETE

OUTPUT

DO/PO–

DO/PO+

DI –

DI +

DISCRETE

INPUT

DISCRETE

OUTPUT

• Discrete Input Connection E.g.

+

-

• Discrete Output Connection E.g.

+

-

DI +

DI –

To other

Modbus devices

■ EXTERNAL INTERFACE CODE: 1

V(–)

U(+)

AO4 –

AO4 +

AO3 –

AO3 +

ANALOG

OUTPUT 3

ANALOG

OUTPUT 4

AO2 –

AO2 +

AO1 –

AO1 +

ANALOG

OUTPUT 1

ANALOG

OUTPUT 2

■ EXTERNAL INTERFACE CODE: 2, 3, 7, 8

T3

T4

T2

T1

Term.

Resist.

+

–

Shielded Twisted-pair Cable

V(–)

U(+)

DO/PO2–

DO/PO2+

DO/PO1–

DO/PO1+

DISCRETE

OUTPUT 1

DISCRETE

OUTPUT 2

DO/PO2–

DO/PO2+

DO/PO1–

DO/PO1+

DISCRETE

OUTPUT 1

DISCRETE

OUTPUT 2

To other

Modbus devices

■ EXTERNAL INTERFACE CODE: 4

V(–)

U(+)

AO4 –

AO4 +

AO3 –

AO3 +

ANALOG

OUTPUT 3

ANALOG

OUTPUT 4

AO2 –

AO2 +

AO1 –

AO1 +

ANALOG

OUTPUT 1

ANALOG

OUTPUT 2

■ EXTERNAL INTERFACE CODE: 5, 6, 9, A

*1. When the device is located at the end of a transmission line via

twisted-pair cable, (when there is no cross-wiring), close across the

terminal T2 – T3 with a leadwire.

When the device is not at the end, no shortcircuit wire is required.

*2. For ‘External interface’ code 7, 8, 9 and A, the analog outputs are

isolated between each other.

AUXILIARY POWER

AUXILIARY POWER

AUXILIARY POWER

AUXILIARY POWER

MODBUS WIRING CONNECTION

R2K-1

T1

T2

T3

T4

54U

T1

T2

T3

T4

T1

T2

T3

T4

54U

RS-232-C

RS-485

*1. Internal terminating resistor is used when the device is at the end of a transmission line.

*2. Install shield cables to all sections and ground them at single point.

FG

RS-485