ALAC AC ALARM

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Limit Alarms (rotary switch adj.) AL-UNIT

AC ALARM

Functions & Features
• Providing SPDT relay outputs at preset AC current/voltage levels
• True RMS sensing
• Dual (Hi/Lo) trip
• Energized or de-energized coil at a tripped
condition selectable
• Rotary switch setpoint adjustments
• Enclosed relays
• Relays can be powered 110 V DC
• High-density mounting
Typical Applications
• Annunciator
• Various alarm applications

MODEL: ALAC-[1][2][3]-[4][5]

ORDERING INFORMATION

• Code number: ALAC-[1][2][3]-[4][5]
Specify a code from below for each of [1] through [5].
(e.g. ALAC-AA11-B/Q)
• Special input range (For codes AZ & A8)
• Specify the specification for option code /Q
(e.g. /C01/S01)

[1] INPUT

Current
AA: 0 – 10 mA AC (Input resistance 100 Ω)
AB: 0 – 50 mA AC (Input resistance 20 Ω)
AC: 0 – 100 mA AC (Input resistance 10 Ω)
AD: 0 – 500 mA AC (Input resistance 1 Ω)
AZ: Specify current (See INPUT SPECIFICATIONS)
(0 % input must be 0 mA.)
Voltage
A1: 0 – 100 mV AC (Input resistance 100 kΩ min.)
A2: 0 – 500 mV AC (Input resistance 100 kΩ min.)
A3: 0 – 1 V AC (Input resistance 100 kΩ min.)
A4: 0 – 5 V AC (Input resistance 100 kΩ min.)
A5: 0 – 10 V AC (Input resistance 100 kΩ min.)
A6: 0 – 120 V AC (Input resistance 100 kΩ min.)
A7: 0 – 150 V AC (Input resistance 100 kΩ min.)
A8: Specify voltage (See INPUT SPECIFICATIONS)
(0 % input must be 0 V.)

[2] SETPOINT 1 OUTPUT

1: Hi (coil energized at alarm)
2: Hi (coil de-energized at alarm)
3: Lo (coil energized at alarm)
4: Lo (coil de-energized at alarm)

[3] SETPOINT 2 OUTPUT

1: Hi (coil energized at alarm)
2: Hi (coil de-energized at alarm)
3: Lo (coil energized at alarm)
4: Lo (coil de-energized at alarm)

[4] POWER INPUT

AC Power
B: 100 V AC
C: 110 V AC
D: 115 V AC
F: 120 V AC
G: 200 V AC
H: 220 V AC
J: 240 V AC
DC Power
S: 12 V DC
R: 24 V DC
V: 48 V DC
P: 110 V DC

[5] OPTIONS

blank: none
/Q: With options (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)

COATING (For the detail, refer to our web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating
TERMINAL SCREW MATERIAL
/S01: Stainless steel

GENERAL SPECIFICATIONS

Construction: Plug-in
Connection: M3.5 screw terminals
Screw terminal: Chromated steel (standard) or stainless steel
Housing material: Flame-resistant resin (black)
Isolation: Input to output 1 to output 2 to power
Input waveform: Up to 15 % of 3rd harmonic content
Setpoint adjustments: 10-position rotary switches (front); 0 – 99 % independently; 1 % increments
Hysteresis (deadband): 0.7 – 2.5 %
Front LEDs: Red LED turns on when the coil is energized.
Power ON timer: Relays de-energized for approx. 2 seconds after power is turned on.

INPUT SPECIFICATIONS

Frequency: 40 Hz min., 1 kHz max.
■ AC Current: 0 – 1 A AC; input resistor incorporated
Minimum span: 1 mA
Input resistance
Span 1 mA: 1 kΩ
Span ≤ 2 mA: 500 Ω
Span ≤ 5 mA: 200 Ω
Span ≤ 10 mA: 100 Ω
Span ≤ 20 mA: 50 Ω
Span ≤ 50 mA: 20 Ω
Span ≤ 100 mA: 10 Ω
Span ≤ 500 mA: 1 Ω
Span ≤ 1 A: 0.5 Ω
■ AC Voltage: 0 – 250 V AC
Minimum span: 50 mV
Input resistance: 100 kΩ min.

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 10⁷ cycles
For maximum relay life with inductive loads, external protection is recommended.

INSTALLATION

Power input
• AC: Operational voltage range: rating ±10 %,
50/60 ±2 Hz, approx. 2 VA
• DC: Operational voltage range: rating ±10 %, or 85 – 150 V for 110 V rating (ripple 10 % p-p max.)
approx. 2 W (80 mA at 24 V)
Operating temperature: -5 to +60°C (23 to 140°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 370 g (0.82 lb)

PERFORMANCE in percentage of span

Setpoint accuracy: ±0.9 %
Trip point repeatability: ±0.05 %
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F)
Response time: Approx. 0.7 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 1 to output 2 to power to ground)