ES-4561-4 Rev.2
38N-4
DCS Input/Output Relay Card Series
OUTPUT RELAY CARD
Functions & Features
• This relay card is a DCS-front-end use relay card installed in a dedicated 19-inch rack, used to manually turn on/off a voltage contact output to directly drive devices such like electromagnetic valve, and to automatically turn it off by an external status contact from the DCS
• Voltage output (LED turns on at output)
• Test switch useful for the DCS test running
• 0.5 A fuse for the voltage output
MODEL: 38N–4
ORDERING INFORMATION
• Code number: 38N-4
OUTPUT CARD
4
: Manual ON / Auto OFF
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
External contact
: M3.5 screw terminals (torque 0.8 N·m)
DCS output, fuse alarm output, voltage output
: Card-edge connector
Voltage contact output
: M3.5 screw terminals (torque 0.8 N·m)
Power input
: Suplied from card edge connector
Screw terminal
: Nickel-plated steel
Isolation
: DCS output or external contact or power to power for voltage output or fuse alarm output
Fuse for voltage output
: 0.5 A incorporated
Alarm contact
: Dry contact output at the alarm output terminals of the rack when the fuse is blown
Indicator LED
: Amber LED turns on with the output ON
INPUT SPECIFICATIONS
■
DCS OUTPUT
: Open collector
Coil rating
: 24 V DC @ 10 mA (approx.)
■
EXTERNAL CONTACT
(EM valve control SW): Dry contact
Coil rating
: 24 V DC @ 20 mA (approx.)
OUTPUT SPECIFICATIONS
■
VOLTAGE CONTACT OUTPUT
Rated load
: 100 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 0.5 A (resistive load)
Electrical life 10
5
cycles (rate 30/min.)
Maximum switching voltage
: 125 V AC or 30 V DC
Maximum switching power
: 50 VA or 15 W
Minimum load
: 5 V DC @ 10 mA
Mechanical life
: 5 × 10
7
cycles
External protection
: Contact protection and noise quenching recommended when driving an inductive load (coil, etc.)
■
FUSE ALARM OUTPUT
: Dry contact
Rated load
: 50 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 0.5 A (resistive load)
Electrical life 10
5
cycles (rate 30/min.)
Maximum switching voltage
: 50 V AC or 30 V DC
Maximum switching power
: 25 VA or 15 W
Minimum load
: 5 V DC @ 10 mA
Mechanical life
: 5 × 10
7
cycles
External protection
: Contact protection and noise quenching recommended when driving an inductive load (coil, etc.)
INSTALLATION
Power input
•
DC
: Operational voltage range 24 V ±10 %; ripple 10 % p-p max.,approx. 40 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 output or external contact or power to power for voltage output to fuse alarm output)
EXTERNAL VIEW
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM