Pierburg CWA200 Brushless Water Pump 40mm OD - 12v

Pierburg CWA200 Brushless Water Pump 40mm OD - 12v

The Pierburg Electrical CWA coolant pumps make a significant contribution to emission control on modern engine designs. A delivery rate that is not dependent on the speed of another drive enables demand-based cooling. This reduces the power requirements whilst also cutting down on frictional loss, fuel consumption and pollutant emissions.

Electrical CWA coolant pumps offer top performance. They can be used for the main cooling of the combustion engine, as well as for cooling the fuel cell stacks of fuel cell drives.

Pierburg has made the electrical water pump ready for series production and was the world’s first series-production supplier for a leading premium vehicle manufacturer.

• Compact radial auxiliary coolant pump.
• Speed control and extended diagnostics information via PWM or LIN bus.
• Efficiency close to 40% at the nominal operating point.
• Demand-based cooling.
• High flow rate at a low pressure.
• Homogeneous heat dissipation.
• Optimised for high-temperature applications and more demanding service life requirements.
• Improved resistance to influences that impair EMC.

Specification	Metric	Imperial & Other
Liquid Temp Range	-40 to 128 °C	-40 to 262 °F
Ambient Temp Range	-40 to 140 °C	-40 to 284 °F
Hose Size	Ø 40 mm	Ø 1.574"
Nominal Diff. Pressure	0.45 Bar	6.52 Psi
Weight	2.15 kg	4.73 lbs
Voltage	12v
Maximum Current Draw	15a
Maximum Electrical Consumption	180w
Protection	IP57 Rated
Motor Type	Brushless Motor
Manufacturer Part Number	Pierburg: 7.02851.20.0 / 7.02851.20.8 / 7.00294.17.0 or BMW: 11517586925 / 11517586924 / 11517563183 / 11517546994 / 11517545201 / 11517521584

Pin	Use
1	+12v
2	PWM Signal
3	Test Signal/BSD Signal
4	Earth/Ground

Connector Part Numbers

Part	Description	Part Number	Quantity
Plug (Male)	Kostal	09441491	1
Terminal	Kostal SLK 2.8 ELA	22124499560	4
Seal	Kostal SLK 2.8 ELA Seal	10800444522	4

Plug, terminals and seals sold separately

Please ensure your supply is fused appropriately.

PWM Input Frequency

The frequency of the PWM/Emergency run signal can be set in the range between 50 to 1000 Hz.

Note: To assure that the pump awakes under PWM/Emergency Run control, an uninterrupted high pulse of at least 3ms musts be applied to the PWM/Emergency run input.

For Example: This is automatically achieved at a PWM/Emergency run frequency of 150 Hz and a duty cycle of 50% or above.

PWM Input Level

Signal Description	Max	Min
V_Hi	UB + 3V* (Max 28v - 60s)	0.6 UB
V_Low	0.4 UB	Ground -3V*

Duty Cycle vs Speed

Mode	Duty Cycle	Speed	Description
1	0% - 6%	Max or 0	Max if BSD = High, 0 if BSD = 0
2	8% - 12%	0	Stop and Reset Errors
3	14% - 85%	Min - Max	Controlled Operation
4	85% - 100%	Max	Full Speed

The tolerance of the pump's interpretation of the PWM signal can vary +/-1% of the duty cycle.

Interaction between the interfaces

BSD Input	PWM Input	Rotation Speed
Signal (Telegramm)	No Signal	According to BSD
Signal (Telegramm)	Signal	According to BSD
Signal (Telegramm)	+ UB	According to BSD
No Signal	No Signal	After timeout: Power save modus, rotation speed = 0
No Signal	Signal	After timeout: According to PWM
No Signal	+ UB	After timeout: Max rotation speed
+ UB	No Signal	After timeout: Max rotation speed
+ UB	Signal	After timeout: According to PWM
+ UB	+ UB	After timeout: Max rotation speed

Duty Cycle

The percentage duty cycle is represented by the relationship of T_high to T_Period.

Duty cycle is PWM.

Duty Cycle % = T_high / (T_low + T_high).