ES-1886 Rev.3

18DO

Rack-mounted DCS Signal Conditioners 18-RACK

CONTACT OUTPUT MODULE

Functions & Features
• Buffer relay for providing signals from a DCS system

MODEL: 18DO–1–R

ORDERING INFORMATION

• Code number: 18DO-1-R

INPUT

Dry contact or open collector

OUTPUT

Relay contact

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: Connector
  Output: M3.5 screw terminals (torque 0.8 N·m)
  Power input: Supplied from connector
Screw terminal: Nickel-plated steel
Isolation: Input or power to output
Indicator LED: Red LED turns on when the coil is energized.
Test switch
 AUTO: Relay energized at ON input
 OFF: Forced relay de-energized
 ON: Forced relay energized

INPUT SPECIFICATIONS

■ Input: Dry contact or open collector
Sensing: 24 V DC @ 20 mA

OUTPUT SPECIFICATIONS

■ Output: SPDT relay
Rating: 120 V AC @ 1 A (cos ø = 1)
30 V DC @ 1A (resistive load)
Electrical life ≥ 1 × 105 cycles
Maximum switching voltage: 264 V AC or 100 V DC
Maximum switching power: 120 VA or 30 W
Minimum load: 5 V DC @ 10 mA
Mechanical life: 5 × 107 cycles
For maximum relay life with inductive
loads, external protection is recommended.

INSTALLATION

Current consumption: Approx. 20 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

Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @ 1 minute
(input or power to output to ground)

EXTERNAL VIEW

EXTERNAL DIMENSIONS unit: mm [inch]

TERMINAL ASSIGNMENTS

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM