MODEL: ALR

ALR SPECIFICATIONS

ES-2713 Rev.9 Page 1/4

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

Limit Alarms (rotary switch adj.) AL-UNIT

RTD ALARM

Functions & Features

• Providing SPDT relay outputs at preset input levels

• Direct input from an RTD • Dual (Hi/Lo) trip

• Linearization

• 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

• 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: ALR–[1][2][3]–[4][5]

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)

• Temperature range (e.g. 0 - 250°C)

• Specify the specification for option code /Q

(e.g. /C01/S01)

[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)

(Usable range: -200 to +650°C, -328 to +1202°F; min.span: 50°C, 90°F)

4: Pt 100 (JIS'97, IEC)

(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)

6: Ni 508.4 Ω

(Usable range: -50 to +200°C, -58 to +392°F; min.span: 30°C, 54°F)

0: Specify

Note: Consult M-System for 2-wire RTD

[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 (multiple selections)

Burnout

blank: Upscale burnout

/BL: Downscale burnout

Other Options

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

/C02: Polyurethane coating

/C03: Rubber coating

TERMINAL SCREW MATERIAL

/S01: Stainless steel