DAST20 datasheet(3/22 Pages) MSYSTEM

3 / 22 page

MODEL: DAST-20

DAST-20 SPECIFICATIONS

ES-5921 Rev.8 Page 3/22

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

varies between the minimum and maximum values,

depending upon the timing of input change.

Minimum Time = Simple Transmission Time

Maximum Time = Simple Transmission Time × 2

MOUNTING REQUIREMENTS unit: mm (inch)

4–M4 SCREW

100 (3.94)

FRONT PANEL CONFIGURATION & TERMINAL ASSIGNMENT

No. DESCRIPTION

EXPLANATION

RUN LED

Red LED ON at normal status;

OFF at anomaly detected by selfdiagnosis;

blinks when there is anomaly in telephone

circuit.

Contact I/O

Monitor LEDs

Red LED ON with contact ON;

provided only for contact I/O types

RUN Contact

Output Terminals

Relay opens when an anomaly is detected.

Power Indicator

LED

Red LED ON at normal status;

OFF when the voltage level drops.

Circuit Test SW

Normally OFF;

turned ON when testing only.

Circuit Status

Indicator LEDs

Red LED; SD blinks during sending;

RD blinks during receiving.

Power Terminals

Refer to the Terminal Connection.

SG, RD, SD

Terminals

Connected with the lightning arrester.

(factory connected)

Circuit Test

Terminals

(T1 – T2, T3 – T4)

Normally shorted with a jumper.

Circuit connection is broken when it is

removed (opened).

Circuit Connection

Terminals

Refer to the Terminal Connection.

Grounding Terminal Refer to the Terminal Connection.

I/O Module

Modem

Lightning Arrester

B A

OFF

LINE

POWER

■ 50 bps TYPE (Transmission Rate Code: 1)

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