MODEL: ALR
6: Ni 508.4 Ω
Limit Alarms (rotary switch adj.) AL-UNIT
(Usable range: -50 to +200°C, -58 to +392°F; min.span: 30°C, 54°F)
0: Specify
RTD ALARM
Note: Consult M-System for 2-wire RTD
Functions & Features
• Providing SPDT relay outputs at preset input levels
• Direct input from an RTD • Dual (Hi/Lo) trip
• Linearization
[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)
• Burnout protection
• "Active bridge" circuit containing two constant current
sources allows large leadwire resistances up to 200 Ω
• Energized or de-energized coil at a tripped condition
selectable
[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)
• Rotary switch setpoint adjustments
• Enclosed relays
• Relays can be powered 110 V DC
• High-density mounting
Typical Applications
• Annunciator
[4] POWER INPUT
AC Power
• Various alarm applications
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
50
(1.97)
80
(3.15)
DC Power
S: 12 V DC
132
(5.20)
R: 24 V DC
mm (inch)
V: 48 V DC
P: 110 V DC
MODEL: ALR–[1][2][3]–[4][5]
[5] OPTIONS (multiple selections)
Burnout
ORDERING INFORMATION
• Code number: ALR-[1][2][3]-[4][5]
Specify a code from below for each of [1] through [5].
(e.g. ALR-111-B/BL/Q)
blank: Upscale burnout
/BL: Downscale burnout
Other Options
• Temperature range (e.g. 0 - 250°C)
• Specify the specification for option code /Q
(e.g. /C01/S01)
blank: none
/Q: Option other than the above (specify the specification)
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
[1] INPUT RTD (2- or 3-wire)
1: JPt 100 (JIS'89)
(Usable range: -200 to +500°C, -328 to +932°F; min.span: 50°C, 90°F)
3: Pt 100 (JIS'89)
/C02: Polyurethane coating
/C03: Rubber coating
(Usable range: -200 to +650°C, -328 to +1202°F; min.span: 50°C, 90°F)
4: Pt 100 (JIS'97, IEC)
TERMINAL SCREW MATERIAL
/S01: Stainless steel
(Usable range: -200 to +650°C, -328 to +1202°F; min.span: 50°C, 90°F)
5: Pt 50 Ω (JIS'81)
(Usable range: -200 to +500°C, -328 to +932°F; min.span: 100°C, 180°F)
ALR SPECIFICATIONS
ES-2713 Rev.9 Page 1/4
http://www.m-system.co.jp/