ES-1885 Rev.9
18DI
Rack-mounted DCS Signal Conditioners 18-RACK
CONTACT INPUT MODULE
Functions & Features
• Buffer relay for providing signals to a DCS system
MODEL: 18DI–1–R
ORDERING INFORMATION
• Code number: 18DI-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
: M3.5 screw terminals (torque 0.8 N·m)
Output
: M3.5 screw terminals (torque 0.8 N·m)
and connector
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 @ 30 mA
OUTPUT SPECIFICATIONS
■
Output
: N.O. relay
Rating
: 120 V AC @ 0.2 A (cos ø = 1)
30 V DC @ 0.2 A (resistive load)
Electrical life ≥ 1 × 10
5
cycles
Maximum switching voltage
: 264 V AC or 100 V DC
Maximum switching power
: 24 VA or 6 W
Minimum load
: 5 V DC @ 10 mA
Mechanical life
: 5 × 10
7
cycles
■
Retransmitted output
: SPDT relay
Rating
: 120 V AC @ 1 A (cos ø = 1)
30 V DC @ 1 A (resistive load)
Electrical life ≥ 1 × 10
5
cycles
Maximum switching voltage
: 264 V AC or 100 V DC
Maximum switching power
: 120 VA or 30 W
Minimum load
: 5 V DC @ 10m A
Mechanical life
: 5 × 10
7
cycles
For maximum relay life with inductive
loads, external protection is recommended.
INSTALLATION
Current consumption
: Approx. 30 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