MODEL: ALDN

ALDN SPECIFICATIONS

ES-2724 Rev.8 Page 1/4

http://www.m-system.co.jp/

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

50

(1.97)

132

(5.20)

80

(3.15)

mm (inch)

6 7 8

6 7 8

6 7 8

6 7 8

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 M-System's 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.