Technical Information
Output Configurations for PLUS+1® Controllers
520L0922
• Rev EA • Sep 2013
9
Driving a Unidirectional
Proportional Valve
It is recommended to use PWM configuration for unidirectional proportional valves. This may be set
for open loop PWM (PinConfig = 3) or closed loop current control (PinConfig = 4 or 5). Recirculating
diodes across the load should never be used if the valve requires closed loop current control. They are
optional for open loop PWM control.
Refererence
FMEA Considerations
, pages 10 and 11.
2304
Load
Ground
+Batt
Logic circuits
FET
PWM Open
Loop
Configuration
FET
Driving a PVE Valve
When driving a Danfoss PVE valve, it is recommended to use the PVE output configuration
(PinConfig = 6). Set the PWM frequency at 4000 Hz.
2305
PVE
+Batt
Ground
+Batt
Logic circuits
FET
PWM Open
Loop
Configuration
FET
Driving a 4-20 mA Device
Driving a 4-20 mA device is not recommended. The minimum controllable current is presently about
10 mA in the closed loop push/pull configuration.