MODEL: ALM
Limit Alarms (rotary switch adj.) AL-UNIT
[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)
POTENTIOMETER ALARM
Functions & Features
• Providing SPDT relay outputs at preset
potentiometer or slidewire positions
• Dual (Hi/Lo) trip
[3] POWER INPUT
AC Power
• Constant voltage excitation allows use with pots with total
resistances from 100 Ω – 10 kΩ without affecting accuracy
• Energized or de-energized coil at a tripped condition
selectable
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
• Rotary switch setpoint adjustments
• Enclosed relays
• Relays can be powered 110 V DC
• High-density mounting
DC Power
Typical Applications
• Annunciator
S: 12 V DC
R: 24 V DC
• Various alarm applications
V: 48 V DC
P: 110 V DC
50
(1.97)
[4] OPTIONS
blank: none
80
(3.15)
/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
132
(5.20)
mm (inch)
/C02: Polyurethane coating
/C03: Rubber coating
MODEL: ALM–[1][2]–[3][4]
TERMINAL SCREW MATERIAL
/S01: Stainless steel
ORDERING INFORMATION
• Code number: ALM-[1][2]-[3][4]
GENERAL SPECIFICATIONS
Construction: Plug-in
Specify a code from below for each of [1] through [4].
(e.g. ALM-11-B/Q)
Connection: M3.5 screw terminals
• Input zero/span adjustments (e.g. 200 – 800 Ω / 1 kΩ)
Specify when you need scaled potentiometer input.
• Specify the specification for option code /Q
(e.g. /C01/S01)
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
Hysteresis (deadband): 0.7 – 2.5 %
INPUT POTENTIOMETER
Total resistance 100 Ω – 10 kΩ
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.
[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)
INPUT SPECIFICATIONS
Minimum span: 50 % of total resistance
Excitation: 0.5 V DC
ALM SPECIFICATIONS
ES-2715 Rev.8 Page 1/3
http://www.m-system.co.jp/