MODEL: OTT2

OTT2 SPECIFICATIONS

ES-3203 Rev.2 Page 2/4

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

GENERAL SPECIFICATIONS

Construction: Plug-in

Transmission method: Light pulse (100 – 500 Hz)

Maximum transmission distance: 30 meters (98 ft)

Connection

I/O & power input: M3.5 screw terminals

Optical fiber: Connector

Screw terminal: Chromated steel (standard) or stainless

steel

Housing material: Flame-resistant resin (black)

Isolation: Input or control output to power

Zero adjustment: -5 to +5 % (front)

Span adjustment: 95 to 105 % (front)

Burnout: Upscale standard; downscale or no burnout

optional

Linearization: Standard

Cold junction compensation: CJC sensor attached to the

input terminals (B thermocouple is without CJC as standard)

Power indicator LED: Green LED turns on when the power is

supplied.

INPUT SPECIFICATIONS

Minimum span: 3 mV

Offset: Max. 1.5 times span

Input resistance: 30 kΩ min.

Burnout sensing: 0.1 μA

Minimum span (in °C)

(PR): min. span 370°C

K (CA): min. span 75°C

E (CRC): min. span 50°C

J (IC): min. span 60°C

T (CC): min. span 75°C

B (RH): min. span 780°C

R: min. span 360°C

S: min. span 380°C

N: min. span 110°C

Minimum span (in °F)

(PR): min. span 670°F

K (CA): min. span 140°F

E (CRC): min. span 90°F

J (IC): min. span 110°F

T (CC): min. span 140°F

B (RH): min. span 1410°F

R: min. span 650°F

S: min. span 690°F

N: min. span 200°F

Note: The described accuracy may be partially not satisfied

when the temperature ranges below 0°C. Consult factory.

OUTPUT SPECIFICATIONS

■ Control Output: External SSR

(output from the OTT2)

INSTALLATION

Power input

•AC: Operational voltage range: rating ±10 %,

50/60 ±2 Hz, approx. 3 VA

•DC: Operational voltage range: rating ±10 %

ripple 10 %p-p max., approx. 2.6 W (110 mA at 24 V)

Operating temperature: -5 to +60°C (23 to 140°F)

Operating humidity: 30 to 90 %RH (non-condensing)

Mounting: Surface or DIN rail

Weight: 350 g (0.77 lb)

PERFORMANCE in percentage of span

Accuracy: ±0.3 % (at over 400°C or 750°F for R, S and PR;

over 770°C or 1420°F for B)

(Overall performance with the OTT2 and OTR2 combined)

Cold junction compensation error

(at 20°C ±10°C or 68°F ±18°F)

K, E, J, T & N: ±0.5°C or ±0.9°F

S, R & PR: ±1°C or ±1.8°F

Temp. coefficient: ±0.015 %/°C (±0.008 %/°F)

(at over 770°C or 1420°F for B)

Response time: ≤ 0.6 second (0 – 90 %) (Overall

performance with the OTT2 and OTR2 combined)

Burnout response: ≤ 10 sec.

Line voltage effect: ±0.1 % over voltage range

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 2000 V AC @ 1 minute

(input or temp. control output to power to ground)