ES-4560-2 Rev.0
38N2-2
DCS Input/Output Relay Card Series
LOOPBACK I/O RELAY CARD
Functions & Features
• Input and output on one card
• Output ON/OFF switch and LED indicating relay status
• Test switch provided for checking DCS operation
• Fuse provided to each channel for solenoid valve
• Output current capacity 3 A
• Output can be jumper selectable: voltage output for solenoid valve or dry contact output
MODEL: 38N2–2
ORDERING INFORMATION
• Code number: 38N2-2
INPUT
Dry contact or open collector
OUTPUT
Voltage or dry contact (jumper selectable)
FUNCTION
2
: Test circuit
RELATED PRODUCTS
• Standard Rack (model: 38N-B)
GENERAL SPECIFICATIONS
Construction
: Rack mounted; terminal access via screw terminals at the front and via connector at the rear
Connection
Contact input
: M3.5 screw terminals (torque 0.8 N·m)
DCS I/O
,
alarm output
: Card-edge connector
Solenoid valve output
: M3.5 screw terminals (torque 0.8 N·m)
Power input
: Supplied from card-edge connector
Screw terminal
: Nickel-plated steel
Isolation
: DCS input to power or DCS output or contact input to solenoid valve output (or dry contact output) to alarm output
Power fuse
: 0.5 A incorporated
Alarm contact
: Dry contact output at the alarm output terminals of the rack when the fuse is blown
Test switch
: LED indicator
INPUT SPECIFICATIONS
■
CONTACT INPUT
: Dry contact or open collector
Contact detecting
: 24 V DC, approx. 25 mA
■
DCS STATUS OUTPUT
: Dry contact or open collector
Contact detecting
: 24 V DC, approx. 25 mA
OUTPUT SPECIFICATIONS
■
SOLENOID VALVE
: Voltage contact
Rated load
: 120 V AC @ 0.5 A (cos ø = 1)
24 V DC @ 0.5 A (resistive load)
Load current
: 8 A max. for the total of 16 channels
■
DRY CONTACT
: Dry contact (solenoid valve or dry contact selectable with the jumper on the PCB)
Rated load
: 120 V AC @ 3 A (cos ø = 1)
24 V DC @ 3 A (resistive load)
Relay protection
: For maximum relay life with inductive loads (e.g. coil), external protection including noise quenching is recommended.
■
DCS STATUS INPUT
: Relay contact
Rated load
: 30 V DC @ 3 A (resistive load)
■ RELAY LIFE
:
Mechanical life
: 5 × 10
7
cycles
Electrical life
: 10
5
cycles
(30 cycles/min. at rated load)
INSTALLATION
Power input
•
DC
: Operational voltage range 24 V ±10 %; ripple 10 % p-p max.,approx. 65 mA
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Standard Rack 38N-B
Weight
: 150 g (0.33 lb)
PERFORMANCE
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 1000 V AC @ 1 minute (DCS input to power or DCS output or contact input to solenoid valve output (or dry contact output) to alarm output)
EXTERNAL VIEW
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM
OPERATION