18AT-74-R

18AT MSYSTEM | Alldatasheet

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Technical content

MODEL: 18AT 18AT SPECIFICATIONS ES-1762 Rev.5 Page 1/4 http://www.m-system.co.jp/ Rack-mounted DCS Signal Conditioners 18-RACK THERMOCOUPLE ALARM Functions & Features

• Providing relay contact closures at preset input levels
• Direct input from a thermocouple
• Burnout protection
• High-accuracy cold junction compensation
• Single or dual (Hi/Lo) trip
• Front accessed screwdriver setpoint adjustments
• Enclosed relays Typical Applications
• Annunciator
• Various alarm applications MODEL: 18AT–[1][2]–R[3]

ORDERING INFORMATION

• Code number: 18AT-[1][2]-R[3] Specify a code from below for each of [1] through [3]. (e.g. 18AT-25-R/BL)
• Temperature range (e.g. 0 – 800°C) Use Ordering Information Sheet (No. ESU-1033) to specify alarm output code 0 specifications. [1] INPUT THERMOCOUPLE 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 [2] ALARM OUTPUT 1: Hi (coil energized at alarm) 2: Hi (coil de-energized at alarm) 3: Lo (coil energized at alarm) 4: Lo (coil de-energized at alarm) 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 POWER INPUT DC Power R: 24 V DC (Operational voltage range 24 V ±10 %, ripple 10 %p-p max.) [3] OPTIONS Burnout 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 Power input: Supplied from connector Screw terminal: Nickel-plated steel Isolation: Input to output to power Relay: Enclosed 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 % Front LEDs: Red LED turns on when the coil is energized. 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

MODEL: 18AT 18AT SPECIFICATIONS ES-1762 Rev.5 Page 2/4 http://www.m-system.co.jp/ S: Min. Span 380°C, 690°F N: Min. Span 110°C, 200°F OUTPUT SPECIFICATIONS Output: Enclosed SPST and SPDT relays Rating: 120 V AC @ 1 A (cos ø = 1)

30 V DC @ 1 A (resistive load)

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) Minimum load: 5 V DC @ 10m A Mechanical life: 5 × 107 cycles 5 – 6 5 – 7 F F ON Od e z i g r e n E De-energized (or power OFF) OFF ON ALARM OUTPUT CODE POWER ON POWER OFF IN < SET IN > SET

1 OFF ON OFF

2 OFF ON ON

3 ON OFF OFF

4 ON OFF ON

• Single Alarm Front terminals Rear connector ALARM OUTPUT CODE POWER ON POWER OFF IN < SET IN > SET 5 – 6 7 – 8 5 – 6 7 – 8 5 – 6 7 – 8

5 ON OFF OFF ON OFF OFF

6 OFF ON ON OFF OFF OFF

Shades indicates that the relay is energized.

• Dual Alarm (front terminals) 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) (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. 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)

500 V AC @ 1 minute (output to power)

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

MODEL: 18AT 18AT SPECIFICATIONS ES-1762 Rev.5 Page 3/4 http://www.m-system.co.jp/ EXTERNAL VIEW High Setpoint Adj. Low Setpoint Adj. ■ SINGLE ALARM 8 7 1 2 4 3 Hi Alarm Indicator ■ DUAL ALARM Lo Alarm Indicator Setpoint Adj. 8 7 1 2 4 3 Indicator EXTERNAL DIMENSIONS unit: mm (inch) 110 (4.33 ) 93 (3.66) 24 (.94) 7 (.28) 78 (3.07)32 (1.26) 8–M3.5 SCREW 7 (.28) 2–M3 SCREW TERMINAL ASSIGNMENTS 8 7 1 2 3 4 CJC SENSOR (model: CJM) r b

MODEL: 18AT 18AT SPECIFICATIONS ES-1762 Rev.5 Page 4/4 http://www.m-system.co.jp/ SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM Comparator OUTPUT 5CONNECTOR SETPOINT ADJ. POWER HI / LO Output *Ry H COM 7 L ■ SINGLE ALARM * Relay status is determined by output codes. ** Deleted with B thermocouple Comparator LO OUTPUT 5CONNECTOR SETPOINT ADJ. POWER Ry ■ DUAL ALARM Comparator SETPOINT ADJ. Ry HI OUTPUT Low Drift Amplifier Burnout Protection T / C CJC SENSOR metal leg comp. leadwire CJC Sensing Volt. Generator red red black Low Drift Amplifier Burnout Protection T / C CJC SENSOR metal leg black comp. leadwire CJC Sensing Volt. Generator model: CJM model: CJM LOAD Inductive Load (Coil) Varistor or Spark Quenching Circuit

• DC Powered LOAD Inductive Load (Coil) Diode, Varistor or CR Circuit ■ Relay Protection
• AC Powered U Specifications are subject to change without notice.