Pierburg CWA100.2 Brushless Water Pump 20mm OD - 12v CWA100-2

Pierburg CWA100.2 Brushless Water Pump 20mm OD - 12v CWA100-2

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.
• Efficiency close to 40% at the nominal operating point.
• Demand-based cooling.
• High flow rate at a low pressure.
• Homogeneous heat dissipation.
• Improved resistance to influences that impair EMC.

Specification	Metric	Imperial & Other
Liquid Temp Range	-40 to 110 °C	-40 to 230 °F
Ambient Temp Range	-40 to 120 °C	-40 to 248 °F
Hose Size	Ø 20 mm	Ø 0.787"
Nominal Diff. Pressure	0.75 Bar	10.87 Psi
Weight	1 kg	2.20 lbs
Voltage	12v
Maximum Current Draw	8.5a
Maximum Electrical Consumption	102w
Protection	IP67 & IP69K Rated
Motor Type	Brushless Motor
Manufacturer Part Number	Pierburg: 7.06754.05.0 / Mercedes: A0005000486

Pin	Use
1	Ground
2	LIN Signal
3	PWM Signal
4	+12v

Connector Part Numbers

Part	Description	Part Number	Quantity
Plug (Male)	Tyco 4 Way	1-1718645-1	1
Terminal	Kostal MLK 1.2 ELA	32140734130	4
Seal	Tyco MLK 1.2 ELA Seal	967056-1	4

Plug, terminals and seals sold separately

Please ensure your supply is fused appropriately.

PWM Input Frequency

The PWM interface has the capability to handle frequencies between 50 to 1000 Hz.

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

For Example: This is automatically achieved at a PWM 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
0	0% - 1%	0 rpm	Stop
1	1% - 7%	Default 6776 rpm	Emergency Run
2	8% - 12%	0 rpm	Stop and Error Reset
3	13% - 85%	Min - Max	Controlled Operation
4	86% - 97%	Max	Maximum Operation
5	98% - 100%	Default 6776 rpm	Emergency Run

The tolerance of the pump's interpretation of the PWM signal can vary +/-2% of the duty cycle.

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).