Power Supply Pins and Limitations

Overvoltage Protection

Max. 70 VDC (stresses above this value may cause permanent damage to the unit.)
The control unit has an overvoltage protection (OVP) which protects the unit and loads against overvoltage. The overvoltage protection is activated when the voltage reaches approximately 36 V.

Power Consumption

< 3,2 W (+24 VDC, no external load)
Supply Voltage (Uin) maximum continuous current 10 A (with full external load)
GND current sum max 10 A
Maximum current per one GND and power pin is 10 A

Use the power ground pins for the power supply return lines. The following table shows the power supply pin locations:

Power supply pins

Designation	Connector / pin number	Potential
Supply voltage (for logic and power)	X1.24	+12/+24 VDC
Power ground pins	X1.1	GND (10 A/pin)
I/O ground	X1.6 X1.18 X1.19 X1.22	GND (10 A/pin)
Supply outputs
Reference supply (for external devices)	X1.28 X1.29	+5 VDC / max 500 mA (max total for all pins together)

To ensure correct measurement, reserve separate GND pin(s) for AI pins and don't use it/them for any other purposes. For more information, see section I/O Cabling.

Always use an external fuse to protect the control unit. The fuse is needed for overload protection.

For more information, see section Power Supply Cabling.

Electrical characteristics

*Symbol*	*Parameter*	*Conditions*	*Min*	*Max*	*Units*
VI	Nominal Input voltage		9	34	V
ITOT-max	Max Total Current Output			10	A
VI-Load-dump	Max Input transient Voltage level	(Note 1)		123	V
VI-max	Max Continuous Input Voltage Level	(Note 2)	-0,5	70	V
VOVP-Reg	Regulated Overvoltage threshold level		typ. 36		V
VUVP	Undervoltage Threshold Level		typ. 5,2		V
VRVP	Reverse Voltage Protection level		typ. -27		V
*Supply voltage monitoring*
VI-range	Nominal Input Voltage measuring range		0	52	V
VI-prop	Measuring accuracy Proportional factor	Calculated		+/-2	%

Note 1: Load dump protection according to ISO 7637-2: 2004 pulse 5, Us=+123 V

Note 2: Limited functionality when the voltage is higher than the nominal. If the voltage is less than 6 V, the control unit is in non-operational state.