MODEL: AS4LC
Plug-in Signal Conditioners M-UNIT
STRAIN GAUGE ALARM(dual or quad alarm trip; field-configurable)
Functions & Features• Accepts a bridge type strain gauge utilized in load cells,pressure transducers• Quad or dual trip
• Setting and display in engineering unit values• Setpoint adjustments with the front keypad• Software lock
• Adjustable hysteresis (deadband)• On-delay timer• Hi/Lo trip and energized/de-energized coil independently
selectable for each setpoint• Enclosed relays• Relays can be powered by 200 V AC and 100 V DC• High-density mounting on DIN rail
Typical Applications• Annunciator• Various alarm applications
72(2.83)

80(3.15)mm (inch)

MODEL: AS4LC–[1][2]–[3][4]ORDERING INFORMATION• Code number: AS4LC-[1][2]-[3][4]Specify a code from below for each of [1] through [4].
(e.g. AS4LC-S12-R/Q)• Specify the specification for option code /Q(e.g. /C01/S01/SET)

S1: 0.0 – 3.0 mV/V
S2: 0.0 – 10.0 mV/V
S3: 0.0 – 30.0 mV/V

[2] OUTPUT
2: 4 points; N.O. or make contact
3: 4 points; N.C. or break contact
5: 2 points; SPDT or transfer contact

AC Power
M2: 100 – 240 V AC (Operational voltage range 85 – 264 V,47 – 66 Hz)
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
P: 110 V DC
(Operational voltage range 85 – 150 V, ripple 10 %p-p max.)[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
EX-FACTORY SETTING/SET: Preset according to the Ordering Information Sheet(No. ESU-1601)

GENERAL SPECIFICATIONS

132(5.20)[1] INPUT STRAIN GAUGE[3] POWER INPUT

Construction: Plug-inConnection: M3.5 screw terminals
Screw terminal: Chromated steel (standard) or stainlesssteel
Housing material: Flame-resistant resin (black)
Isolation: Input to output to power
Excitation adjustment: 0.1 – 12.0 V (front)
Zero adjustment: -19.99 – 99.99 % (front)
Gain adjustment: 0.000 – 9.999 (front)
Tare adjustment: -199.9 – 999.9 % (front or by contact input(Di))
Sampling cycle: 100 msec.
User-configurable items: Front key pad• Alarm setpoint• Display range scaling• Power ON-delay time
• Alarm ON-delay time
• Moving average• Hi/Lo trip operation• Coil at alarm• Hysteresis (deadband)• Sensor sensitivity• Contact input (Tare adjustment, Peak hold, Valley hold,Sample hold)• 0 %, 100 % input setting

AS4LC SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-1601 Rev.14 Page 1/4

MODEL: AS4LC• Others(Refer to the instruction manual)■ DISPLAY
LED: 8 mm (.31”) 7 segment, red
Number of display digits: 4 digits for DATA display; 2 digits
for ITEM display
Range: -1999 to 9999
(decimal point position selectable)
PV indication: Input signal in engineering unit
Overrange indication: LEDs blinking
Power saving mode: Displays turn off if the keys areuntouched for a preset time period
LEDs: Red LEDs turn on when coils are energized.
(PL1 and PL2 for 2-point alarm. PL1, PL2, PL3 and PL4 for 4point alarm.)

240 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 1 A (resistive load)(Limited within 0.5 A to conform with EU Directive)
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 × 107 cycles
Alarm Trip Operation
Terminal No. in parentheses
Example with quad N.O. contacts (LL, L, H, HH)

L1 (9–8)

Relay rating:
120 V AC @ 1 A (cos ø = 1)

OFF ON

L4 (1–8)
▲LL▲
L50

▲ ▲
H HH100Trip Operation in Power Failure• Output code 2: All relays turn off.
• Output code 3: All relays turn on.
• Output code 5: Terminals 15 – 8, 1 – 8 turn on.

INSTALLATIONPower consumption•AC: Approx. 11 VA•DC: Approx. 8 W
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 500 g (1.1 lb)

PERFORMANCE in percentage of span
Setpoint accuracy (trip point accuracy): ±(0.1 % of FS + 1digit)
Display accuracy: ±(0.1 % of FS + 1 digit)
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F) of max. span
Response time: ≤ 1.5 sec. (0 – 100 % at 90 % setpoint)
Excitation: Set value ±250 mVLine voltage effect: ±0.1 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @1 minute (input to outputto power to ground)

STANDARDS & APPROVALS
EU conformity:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
Low Voltage Directive
EN 61010-1

AS4LC SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

OFF ON

L3 (10–8)

INPUT SPECIFICATIONSOUTPUT SPECIFICATIONSON OFF

L2 (15–8)

Input(%) 0■ Strain Gauge Input• Strain Gauge
Sensor sensitivity setting
S1: 0.010 - 3.000mV/V
S2: 0.010 - 9.999mV/V
S3: 0.10 - 30.00mV/V
Sensor sensitivity setting min. step:
S1: 0.001 mV/V
S2: 0.001 mV/V
S3: 0.01 mV/V
Default setting:S1: 3.000 mV/V
S2: 9.999 mV/V
S3: 30.00 mV/V
Rated output from strain gauge:
S1: -30.00 – +30.00 mV, span 1.00 – 30.00 mV
S2: -99.99 – +99.99 mV, span 3.00 – 99.99 mV
S3: -300.0 – +300.0 mV, span 10.0 – 300.0 mV
Input voltage setting min. step:
S1: 0.01 mV
S2: 0.01 mV
S3: 0.1 mV
Note: Consult factory for use with a compression/tension
load cells.
• Excitation: 0.1 – 12.0 V adjustable (0.1 V increments)
Maximum current: 30 mA
Default setting: 1.0 V■ Contact Input: TTL level (5V-CMOS level), open collector
or dry contact (detecting voltage: approx. 5 V, saturation
voltage: ≤ 1 V, sink current: 0.5 mA)

ON OFFES-1601 Rev.14 Page 2/4

MODEL: AS4LC
Measurement Category II (output)
Installation Category II (power)
Pollution Degree 2
Input to output to power: Basic insulation (300 V)
RoHS Directive

EXTERNAL VIEWDATADATA Display
ITEM

ITEM No. Display

PL1*Monitor LEDs

PL2ITEM

PL3
PL4DATADATA UP-DOWN Keys
ITEM No. UP-DOWN Keys

*PL3 or PL4 does not turn on for dual output type.

Refer to the instruction manual for detailed procedures.

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
CLAMP[top & bottom]
20[.79]7.8 [.31]
DIN RAIL
35mm wide

7 14 65 12 4

2–4.5 [.18] dia.
MTG HOLE
25 [.98] deep
14–M3.5
SCREW
50 [1.97]
72 [2.83]

89 15 10

1 11 260 [2.36]

103 [4.06]
132 [5.20]

80 [3.15]

80 [3.15]

3[3.3 [.13]]

72 [2.83]• When mounting, no extra space is needed between units.

AS4LC SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-1601 Rev.14 Page 3/4

MODEL: AS4LCSCHEMATIC CIRCUITRY & CONNECTION DIAGRAM■ OUTPUT CODE: 3■ OUTPUT CODE: 2• N.O. Relay Output• N.C. Relay Output
PL1 PL2 PL3 PL4STRAINGAUGE+ 4INPUT– 12+ 5EXC.

– 6Ry

Low Drift
AmplifierLow Drift
DC Volt.
Stabilizer

RyDigital
Computation
Circuit

RyRy

3DATA

9 L1 OUTPUT

15 L2 OUTPUT

15 L2 OUTPUT

10 L3 OUTPUT

10 L3 OUTPUT

1 L4 OUTPUT

1 L4 OUTPUT

8 COM

3 COM

7 U(+)+ 11CONTACTINPUT (Di)

9 L1 OUTPUT

POWER

14 V(–)ITEM– 2Base Socket■ OUTPUT CODE: 5• SPDT Relay Output
PL1STRAIN
GAUGE■ Relay Protection• AC Powered

PL2Inductive
Load (Coil)

9 NO+ 4INPUT– 12+ 5EXC.

– 6Ry

Low Drift
DC Volt.
Stabilizer

L1 OUTPUT

15 NC

Low Drift
Amplifier

LOAD

Varistor or Spark
Quenching Circuit

RyDigital
ComputationCircuit

10 NOU• DC Powered

1 NC

L2 OUTPUT

InductiveLoad (Coil)

8 COM
LOAD

3Diode, Varistor or
CR Circuit

7 U(+)
POWER
DATA

+ 11

CONTACT
INPUT (Di)– 214 V(–)

ITEM

Base Socket

Specifications are subject to change without notice.

AS4LC SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-1601 Rev.14 Page 4/4