Unit Manual : ESP-2000BS Page1(6)

SPEED MEASURING UNIT USER MANUAL

(ESP-2000-BS)

Applied to HIMSEN (H25/33, H21/32) and L27/38 Engine, this

intrinsically safe SPEED MEASURING UNIT is designed to take

frequency values measured by SPS-02 Pick-Up Sensor(for Engine RPM)

and TPS Pick-Up Sensor(for T/C RPM), mounted onto Flywheel Cover,

and thereon calculate the two RPMs by applying the number of Teeths,

providing Driver outputs to drive Engine-related Relay.

Unit Manual : ESP-2000BS Page2(6)

1. SPECIFICATION

Steel Case Material

720g Weight

F.S ±0.2% Accuracy

Teeth &

Rpm

Teeth: 1 EA ~ 500 EA (MAX. Rpm = 1200Rpm)

0 ~ 1200 Rpm

Display Method Relay Output Status Display LED.

SPS-02 Sensor

4. Overspeed

3. Running

2. Safety-start

1. Tacho-fail

+UB = 12V MAX. (300mA)

+UB (10V~40V)-1.8V Square Wave

90(W)ⅹ130(H)ⅹ40(D) (UNIT:mm) Dimension

H25/33, H21/32, L27/38 Applied Engines

Over than 100MΩ Insulation Resistance

ENG. Power Source for

FET Driver MAX=100V, 500mA

Relay Driver Output

Output

ENGINE Speed

Less than 95% RH. (Non Condensing)

- 25 ~ +70℃

-10 ~ +65℃

Sensor Type

Fixed Setting using DIP S/W

1.44W (MAX.: 60mA, DC24V)

DC 24V ±20%

ESP-2000-BS (SAFETY-UNIT)

Operating Humidity

Operating Temperature

Storage Temperature

Consumption Power

Input

Setting

Power Supply

MODEL ITEM

Unit Manual : ESP-2000BS Page3(6)

2. Product Composition

Figure1. Product Composition

① Status Display LED

ⓐ Safety Start LED: Indicate the complete stop of Engine.

ⓑ Tacho Fail: Indicate Start Fail which means RMP sharply decreases from 200 to

0 at the time of Pick-up Sensor Open.

ⓒ ENGINE Run LED: Indicate the running of Engine.

ⓓ Over Speed LED: Indicate Engine RPM equals or exceeds Overspeed RPM.

② RELAY DRIVER OUTPUT

①Status Display LED

② RELAY DRIVER OUTPUT

Unit Manual : ESP-2000BS Page4(6)

3. FUNTION DESCRIPTION

3-1. ENGINE RPM MEASURING

Speed Measuring Unit receives frequencies, measured by Pick-up Sensor(for

Engine RPM) mounted onto Flywheel Cover, and internally reduces RPM as

lllustrated below and thereon operates related outside Engine RPM sRelay by

using its built-in Driver.

(RPM Reduction and Output Range)

3-2. RELAY OUTPUTS RELATED TO RPM

Figure2. ESP-2000BS OUTLINE

3-2-1. TACHO FAIL (Relay contact: Normal Close): Terminal 7

① Normal Close works at the time of power supp.

② In case that any one of the 3 lines for Pick-up Sensor is opened, it causes

the status of Fail.

0 ~ 6 V 0 ~ 6 V Output [V]

0 ~ 1200 RPM 0 ~ 1200 RPM RPM

1200(RPM)Ⅹ282 (Gear) /60Sec =5640 Hz

1200(RPM)Ⅹ286(Gear) /60Sec =5720 Hz

Calculated Frequency

[Hz]

H25/33 H21/32 Classification

Unit Manual : ESP-2000BS Page5(6)

(Tacho Fail is removed when Sensor is properly connected or when

Power is reset.)

③ In case that RPM does not reach 50(fixed) within 5 sec after Start Signal

becomes on, it caused the status of Fail.

(Tacho Fail is removed when Engine RPM is 200 or over or at the time of

Power resetting)

④ In case that RPM sharply decreases 200(fixed) to 0, it causes the status of

Fail in 1 second.

(Tacho Fail is removed when Engine RPM is 200 or over or at the time of

Power resetting)

3-2-2. SAFETY START (Relay contact: Normal Open): Terminal 8

① This output works 5 seconds after RPM becomes 0 duing Power supply

② The output works 5 seconds after RPM becomes 0 when Safety Start is off,

indicating the stoppage of Engine

③ The output is removed when Tacho Fail is caused, Safety Start Off RPM is

exceeded, or Engine Start Signal becomes on.

3-2-3. ENGINE RUNNING (Relay contact: Normal Open): Terminal 9

① This output indicates the status of Engine running. It works when Engine

speed is more than Engine Running On RPM or 200, or Engine Running

Delay Timer completes its counting.

② The output is removed when Engine Speed decreases again from Engine

Running On RPM or over to Engine Running Off RPM or below.

③ The output is removed when Engine RPM becomes 200 or below after

Engine running provided Engine Running Delay Timer completes its

counting

3-2-4. OVERSPEED (Relay contact: Normal Open): Terminal 10

① This output works when Engine speed is Enginer Over Speed On RPM or

over

② The output is removed when Engine speed becomes 10% of Engine Over

(i.e. : 828 -(828´0.1) = 745)

Unit Manual : ESP-2000BS Page6(6)

4. SETTING

1. Power Off

2. Change a DIP S/W status for software group NO. according to the engine type

(Refer to the wiring diagram for software group NO.)

3. Power ON

SOFT.6 6

SOFT.5 5

SOFT.7 7

SOFT.4

SOFT.3

SOFT.2

SOFT.1

SOFT.0 SOFTWARE GROUP NO

3

1

4

0

2

DIP S/W STATUS

ON

1 2 3 4

DIP S/W