ALDN TWO-WIRE TRANSMITTER ALARM

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Limit Alarms (rotary switch adj.) AL-UNIT

TWO-WIRE TRANSMITTER ALARM

(with square root extractor)
Functions & Features
• Powering a 4 – 20 mA DC current loop
• Providing SPDT relay outputs at preset current levels
• Shortcircuit protection
• Square root extraction
• Applicable to smart transmitters
• 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: ALDN–[1][2]–[3][4]

ORDERING INFORMATION

• Code number: ALDN-[1][2]-[3][4]
Specify a code from below for each of [1] through [4].
(e.g. ALDN-11-B/Q)
• Specify the specification for option code /Q
(e.g. /C01/S01)

INPUT

Current
4 – 20 mA DC (Input resistance 250 Ω)

[1] 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)

[2] 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)

[3] 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

[4] 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
Setpoint adjustments: 10-position rotary switches (front); 0 – 99 % independently; 1 % increments
Low-end cutout function: Below 1 % input. A setpoint below 10 % output equals 0 %.
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.

SUPPLY OUTPUT

Output voltage: 24 – 28 V DC with no load
Current rating: ≤ 22 mA DC
• Shortcircuit Protection
Current limited: 35 mA max.
Protected time duration: No limit

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 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. 2.5 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: 380 g (0.84 lb)

PERFORMANCE in percentage of span

Setpoint accuracy: ±0.5 % (within 1 - 100 % input)
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)