MODEL: OTT2

OTT2 SPECIFICATIONS

ES-3203 Rev.2 Page 4/4

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

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

Base Socket

Low Drift

Amplifier

U(+)

V(–)

POWER

7

8

+

–

T / C

CJC

SENSOR

metal leg

model: CJM

comp. leadwire

3

5

4

+

–

6

Linearizer

CJC Sensing

Volt. Generator

1

2

Z

Volt. / Freq.

Converter

S

FIBER OPTICS A

Pulse Volt.

Amplifier

FIBER OPTICS B

1.2kΩ

+15V

SSR

Control

Output

■ OTT2 (input)

+

–

Base Socket

3

OUTPUT

4

1

2

U(+)

V(–)

POWER

7

8

+

–

5

6

CONTROL

INPUT

■ OTR2 (output)

*

* Deleted with B thermocouple

Power LED

FUNCTIONS

The OTT2 unit converts mV input signals from a thermocouple into light pulse re ections, and transmits them to the OTR2

unit via

ber optics cable (A), while the OTR2 converts the light pulse re ections into analog signals and output them to a

temperature controller.

The OTR2 transmits also ON-OFF control signals from the controller in the same manner via

ber optics cable (B), to the

OTT2 unit while produces voltage pulse signals for driving the SSR for the heater.

The SSR must accept a DC input and have zero-cross function.

FIBER OPTICS

FIBER OPTICS

CONTROL

INPUT

U(+)

V(–)

POWER

OUTPUT

7

8

1

2

5

6

B

INPUT

+

–

+

OUTPUT

–

DC SIGNAL

+12V

0V

OTR2

TEMP.

CONTROLLER

A

CONTROL

OUTPUT

U(+)

V(–)

A

7

8

POWER

+

–

T / C

CJC

SENSOR

metal leg

model: CJM

comp. leadwire

3

5

4

+

–

1

2

INPUT

~

+

SSR

~

–

HEATER

OTT2

B

Specifications are subject to change without notice.