18AS2 MSYSTEM | Alldatasheet

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Technical content

MODEL: 18AS2 18AS2 SPECIFICATIONS ES-1769 Rev.3 Page 1/4 http://www.m-system.co.jp/ Rack-mounted DCS Signal Conditioners 18-RACK DC ALARM Functions & Features

  • Providing relay contact closures at preset DC input levels
  • Single or dual (Hi/Lo) trip
  • Frontaccessed screwdriver setpoint adjustments
  • Enclosed relays Typical Applications
  • Annunciator
  • Various alarm applications MODEL: 18AS2–[1][2]–R

ORDERING INFORMATION

  • Code number: 18AS2-[1][2]-R Specify a code from below for each of [1] and [2]. (e.g. 18AS2-62-R)
  • Special input range (For code 0) Use Ordering Information Sheet (No. ESU-1033) to specify alarm output code 0 specifications. [1] INPUT Current A: 4 – 20 mA DC (Input resistance 250 Ω) D: 0 – 20 mA DC (Input resistance 50 Ω) G: 0 – 1 mA DC (Input resistance 1000 Ω) H: 10 – 50 mA DC (Input resistance 100 Ω) Voltage 3: 0 – 1 V DC (Input resistance 1 MΩ min.) 4: 0 – 10 V DC (Input resistance 1 MΩ min.) 5: 0 – 5 V DC (Input resistance 1 MΩ min.) 6: 1 – 5 V DC (Input resistance 1 MΩ min.) 0: Specify voltage (See INPUT SPECIFICATIONS) [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.) 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 Hysteresis (deadband): Approx. 1 % Front LEDs: Red LED turns on when the coil is energized. INPUT SPECIFICATIONS ■ DC Current: Input resistor incorporated ■ DC Voltage: 0 – 300 V DC Minimum span: 1 V Offset: Max. 1.5 times span Input resistance: ≥ 1 MΩ

MODEL: 18AS2 18AS2 SPECIFICATIONS ES-1769 Rev.3 Page 2/4 http://www.m-system.co.jp/ OUTPUT SPECIFICATIONS Output: Enclosed SPST and SPDT relays Rating:

30 V DC @ 1 A (resistive load)

0.2 A for the connector output

Maximum switching voltage: 30 V DC Max. switching power: 30 W (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 % Temp. coefficient: ±0.015 %/°C (±0.008 %/°F) Response time: ≤ 0.5 sec. (0 – 100 % at 90 % setpoint) 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: 18AS2 18AS2 SPECIFICATIONS ES-1769 Rev.3 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 1 2 3 4 7 8 5 6

MODEL: 18AS2 18AS2 SPECIFICATIONS ES-1769 Rev.3 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 * Input shunt resistor incorporated for current input. ** Relay status is determined by output codes. Comparator LO OUTPUT 5CONNECTOR SETPOINT ADJ. POWER Ry ■ DUAL ALARM Comparator SETPOINT ADJ. Ry HI OUTPUT INPUT

1 Low Drift

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.