18AT-32-R/BN [MSYSTEM]

Rack-mounted DCS Signal Conditioners 18-RACK;


型号：	18AT-32-R/BN
厂家：	M-SYSTEM
描述：	Rack-mounted DCS Signal Conditioners 18-RACK DCS 分布式控制系统
文件：	总4页 (文件大小：129K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MODEL: 18AT

4: Lo (coil de-energized at alarm)

Rack-mounted DCS Signal Conditioners 18-RACK

5: Hi/Lo; N.O., OFF in power failure

(connector output not available)

6: Hi/Lo; N.C., OFF in power failure

(connector output not available)

0: Specify

THERMOCOUPLE ALARM

Functions & Features

• Providing relay contact closures at preset input levels

• Direct input from a thermocouple

• Burnout protection

POWER INPUT

DC Power

• High-accuracy cold junction compensation

• Single or dual (Hi/Lo) trip

R: 24 V DC

• Front accessed screwdriver setpoint adjustments

• Enclosed relays

(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)

Typical Applications

• Annunciator

[3] OPTIONS

Burnout

• Various alarm applications

blank: Upscale burnout

/BL: Downscale burnout

/BN: No burnout

GENERAL SPECIFICATIONS

Construction: Rack-mounted; terminal access via screw

terminals on the front and connector on the rear; terminal

cover provided

Connection

Input: M3.5 screw terminals (torque 0.8 N·m)

Alarm output: M3.5 screw terminals (torque 0.8 N·m) and

connector

MODEL: 18AT–[1][2]–R[3]

ORDERING INFORMATION

• Code number: 18AT-[1][2]-R[3]

Power input: Supplied from connector

Screw terminal: Nickel-plated steel

Specify a code from below for each of [1] through [3].

(e.g. 18AT-25-R/BL)

Isolation: Input to output to power

Relay: Enclosed

• Temperature range (e.g. 0 – 800°C)

Use Ordering Information Sheet (No. ESU-1033) to specify

alarm output code 0 specifications.

Setpoint adjustments: Multi-turn screwdriver adjustments

(front); -5 – +105 % independently

Cold junction compensation: CJC sensor attached to the

input terminals (B thermocouple is without CJC as standard)

Hysteresis (deadband): Approx. 1 %

[1] INPUT THERMOCOUPLE

Front LEDs: Red LED turns on when the coil is energized.

1: (PR) (Usable Range 0 to 1760°C, 32 to 3200°F)

2: K (CA) (Usable range -270 to +1370°C, -454 to +2498°F)

3: E (CRC) (Usable range -270 to +1000°C, -454 to +1832°F)

4: J (IC) (Usable range -210 to +1200°C, -346 to +2192°F)

5: T (CC) (Usable range -270 to +400°C, -454 to +752°F)

6: B (RH) (Usable range 0 to 1820°C, 32 to 3308°F)

7: R (Usable range -50 to +1760°C, -58 to +3200°F)

8: S (Usable range -50 to +1760°C, -58 to +3200°F)

N: N (Usable range -270 to +1300°C, -454 to +2372°F)

0: Specify

INPUT SPECIFICATIONS

Input: Thermocouples

Minimum span: 3 mV

Offset: Max. 1.5 times span

Input resistance: 20 kΩ minimum

Burnout sensing: 0.1 μA

(PR): Min. Span 370°C, 670°F

K (CA): Min. Span 75°C, 140°F

E (CRC): Min. Span 50°C, 90°F

J (IC): Min. Span 60°C, 110°F

T (CC): Min. Span 75°C, 140°F

B (RH): Min. Span 780°C, 1410°F

R: Min. Span 360°C, 650°F

[2] ALARM OUTPUT

1: Hi (coil energized at alarm)

2: Hi (coil de-energized at alarm)

3: Lo (coil energized at alarm)

18AT SPECIFICATIONS

ES-1762 Rev.5 Page 1/4

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

MODEL: 18AT

S: Min. Span 380°C, 690°F

N: Min. Span 110°C, 200°F

(at over 400°C or 750°F for R, S and PR; over 770°C or

1420°F for B)

Response time: ≤ 0.5 sec. (0 – 100 % at 90 % setpoint)

Burnout response: ≤ 10 sec.

OUTPUT SPECIFICATIONS

Output: Enclosed SPST and SPDT relays

Rating: 120 V AC @ 1 A (cos ø = 1)

30 V DC @ 1 A (resistive load)

Line voltage effect: ±0.1 % over voltage range

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 1500 V AC @ 1 minute

(input to output or power)

0.2 A maximum for the connector output

Maximum switching voltage: 120 V AC or 30 V DC

Max. switching power: 120 VA or 30 W (24 VA or 6 W for the

connector output)

500 V AC @ 1 minute (output to power)

1500 V AC @ 1 minute (input or output or power to ground)

Minimum load: 5 V DC @ 10m A

Mechanical life: 5 × 10 cycles

• Single Alarm

Front terminals

5 – 6

5 – 7

OFF

Energized

De-energized (or power OFF)

OFF

Rear connector

ALARM

OUTPUT

CODE

POWER ON

POWER OFF

IN < SET

OFF

IN > SET

OFF

• Dual Alarm (front terminals)

POWER ON

ALARM

POWER OFF

5 – 6 7 – 8

IN < SET

IN > SET

OUTPUT

CODE

5 – 6 7 – 8 5 – 6 7 – 8

OFF

OFF OFF

OFF

Shades indicates that the relay is energized.

INSTALLATION

Current consumption: Approx. 80 mA

Operating temperature: -5 to +55°C (23 to 131°F)

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

Mounting: Standard Rack 18BXx or 18KBXx

Weight: 150 g (0.33 lb)

PERFORMANCE in percentage of span

Trip point repeatability: ±0.1 %

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)

18AT SPECIFICATIONS

ES-1762 Rev.5 Page 2/4

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

MODEL: 18AT

EXTERNAL VIEW

■ SINGLE ALARM

■ DUAL ALARM

Indicator

Hi Alarm Indicator

High Setpoint Adj.

Low Setpoint Adj.

Lo Alarm Indicator

Setpoint Adj.

EXTERNAL DIMENSIONS unit: mm (inch)

2–M3

SCREW

8–M3.5

7 (.28)

SCREW

7 (.28)

24 (.94)

32 (1.26)

78 (3.07)

TERMINAL ASSIGNMENTS

CJC SENSOR (model: CJM)

18AT SPECIFICATIONS

ES-1762 Rev.5 Page 3/4

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

MODEL: 18AT

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

■ SINGLE ALARM

■ Relay Protection

•AC Powered

Burnout

SETPOINT ADJ.

Protection

Inductive

Load (Coil)

comp. leadwire

COM

T / C

Varistor or Spark

Quenching Circuit

Low Drift

Amplifier

Comparator

LOAD

OUTPUT

–

metal leg

–

•DC Powered

Inductive

Load (Coil)

CJC

SENSOR

HI / LO

Output

Diode, Varistor or

CR Circuit

red

CJC Sensing

Volt. Generator

LOAD

model: CJM

POWER

black

■ DUAL ALARM

Burnout

Protection

SETPOINT ADJ.

Comparator

comp. leadwire

T / C

Low Drift

Amplifier

LO OUTPUT

HI OUTPUT

–

metal leg

–

Comparator

CJC

SENSOR

red

CJC Sensing

Volt. Generator

SETPOINT ADJ.

model: CJM

black

POWER

* Relay status is determined by output codes.

**Deleted with B thermocouple

Specifications are subject to change without notice.

18AT SPECIFICATIONS

ES-1762 Rev.5 Page 4/4

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

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