ES-1991 Rev.6
L4AS
Plug-in Signal Conditioners M-UNIT
QUAD DC ALARM
Functions & Features
• Providing relay contact closures at preset DC input levels
• 4 setpoints: Hi/Hi, Hi, Lo, Lo/Lo
• Single turn screwdriver or dial setpoint adjustments
• Enclosed relays
• Relays can be powered 110 V DC
• Isolation up to 2000 V AC
• High-density mounting
Typical Applications
• Annunciator
• Various alarm applications
MODEL: L4AS–[1][2][3]–[4]
ORDERING INFORMATION
• Code number: L4AS-[1][2][3]-[4]
Specify a code from below for each of [1] through [4].
(e.g. L4AS-1A1-R)
[1] SETPOINT ADJUSTMENTS
1
: Single-turn screws
2
: Dials
[2] INPUT
Current
A
: 4 – 20 mA DC (Input resistance 250 Ω)
Voltage
6
: 1 – 5 V DC (Input resistance 1 MΩ min.)
[3] OUTPUT
1
: 4 points; coil energized with input > setpoint
2
: 2 points; coil energized with input < setpoint 2 points;
coil energized with input > setpoint
[4] POWER INPUT
AC Power
K
: 85 – 132 V AC
(Operational voltage range 85 – 132 V, 47 – 66 Hz)
L
: 170 – 264 V AC
(Operational voltage range 170 – 264 V, 47 – 66 Hz)
DC Power
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
P
: 110 V DC
(Operational voltage range 85 – 150 V, ripple 10 %p-p max.)
GENERAL SPECIFICATIONS
Construction
: Stand-alone; terminal access at the front
Connection
: M3.5 screw terminals (torque 0.8 N·m)
Housing material
: Flame-resistant resin (black)
Isolation
: Input to output to power
Setpoint adjustments
: Single-turn screwdriver adjustments or dials (front); -15 – +115 % independently
Hysteresis (deadband)
: Approx. 1 %
Front LEDs
: Red LED turns on when the coil is energized.
INPUT SPECIFICATIONS
■
DC Current
: Input resistor incorporated
OUTPUT SPECIFICATIONS
■
Relay Contact
: 100 V AC @ 1 A (cos ø = 1)
120 V AC @ 1 A (cos ø = 1)
240 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 1 A (resistive load)
Maximum switching voltage
: 380 V AC or 125 V DC
Maximum switching power
: 120 VA or 30 W
Minimum load
: 5 V DC @ 10 mA
Mechanical life
: 5 x 10
7
cycles
For maximum relay life with inductive loads, external protection is recommended.
INSTALLATION
Power consumption
•
AC
: Approx. 4.5 VA
•
DC
: Approx. 2 W (80 mA at 24 V)
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Surface or DIN rail
Weight
: 350 g (0.77 lb)
PERFORMANCE in percentage of span
Setpoint accuracy
: ±0.3 %
Temp. coefficient
: ±0.05 %/°C (±0.03 %/°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
: 2000 V AC @1 minute (input to output to power to ground)
MOUNTING REQUIREMENTS
EXTERNAL VIEW
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM