18AT-83-R/BN [MSYSTEM]
Rack-mounted DCS Signal Conditioners 18-RACK;型号: | 18AT-83-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
7
• Single Alarm
Front terminals
5 – 6
ON
5 – 7
OFF
ON
Energized
De-energized (or power OFF)
OFF
Rear connector
ALARM
OUTPUT
CODE
POWER ON
POWER OFF
IN < SET
OFF
IN > SET
ON
1
2
3
4
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ON
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
5
6
ON
OFF
ON
OFF
ON
ON
OFF OFF
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
7
8
7
8
Indicator
Hi Alarm Indicator
5
1
6
5
1
6
2
High Setpoint Adj.
Low Setpoint Adj.
Lo Alarm Indicator
Setpoint Adj.
2
3
4
3
4
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
7
8
5
6
1
2
3
4
r
b
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
8
SETPOINT ADJ.
Protection
Inductive
Load (Coil)
comp. leadwire
5
6
7
COM
T / C
Varistor or Spark
Quenching Circuit
+
Low Drift
Amplifier
+
1
Ry
Comparator
LOAD
*
*
H
L
OUTPUT
–
metal leg
U
–
•DC Powered
Inductive
Load (Coil)
2
3
4
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
5
6
7
8
+
Low Drift
Amplifier
LO OUTPUT
HI OUTPUT
+
1
Ry
Ry
–
metal leg
*
–
2
3
4
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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