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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 MODEL ITEM
ESP-2000-BS (SAFETY-UNIT) DC 24V ±20%
Power Supply
1.44W
Consumption Power
Relay Output Status Display LED.
Display Method Accuracy
F.S ±0.2%
Setting
Fixed Setting using DIP S/W Sensor Type
Input
(MAX.: 60mA, DC24V)
ENGINE Speed
Power Source for
SPS-02 Sensor
+UB (10V~40V)-1.8V Square Wave
Teeth & Rpm
Teeth: 1 EA ~ 500 EA (MAX. Rpm = 1200Rpm) 0 ~ 1200 Rpm
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
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.
Classification
H21/32
H25/33
Calculated Frequency [Hz]
1200(RPM)Ⅹ286(Gear) /60Sec =5720 Hz
1200(RPM)Ⅹ282 (Gear) /60Sec =5640 Hz
RPM
0 ~ 1200 RPM
0 ~ 1200 RPM
Output [V]
0~6V
0~6V
(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.
Unit Manual : ESP-2000BS
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(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
