Baldor MN1274 06/2001 installation manual OUT.4, OUT.2, OUT.0, OUT.3, OUT.1

3.3.4Digital Outputs - X5

		Location Connector X5
		Pin	Name	Mint keyword
		10	DOUT4	OUT.4
		11	DOUT2	OUT.2
		12	DOUT0	OUT.0
		23	DOUT3	OUT.3
		24	DOUT1	OUT.1
1		Description Five general purpose optically isolated digital outputs
	14	(DOUT0 to DOUT4).
		These general purpose optically isolated outputs can only be used to source
		current from the USR V+ rail (pin 25). The output current source passes
		through the load to USR GND (pin 13). The outputs are updated immediately
		and can be written to directly using the Mint keyword OUT (for example OUT.4).
13	25	Note: The outputs have different current ratings!

DOUT0 is a high current output, rated at a maximum continuous current of 1A. DOUT1~DOUT3 are lower current outputs, rated at a maximum continuous current of 250mA on each output. There is no minimum current load requirement for DOUT0~DOUT4.

OUT.4

D

S

VN330SP

output driver

X5--25 USR V+

X5--10 (250mA max)

Relay coil with flyback diode

X5--13

USR GND

X5

10

11

12

13

23

24

25

DOUT4 (OUT.4) DOUT2 (OUT.2) DOUT0 (OUT.0)

USR GND DOUT3 (OUT.3) DOUT1 (OUT.1) USR V+

Figure 19 - X5 Digital output circuit

These MOSFET type outputs are driven from ST VN330SP devices and have a maximum ON resistance of 0.4Ω. There are protection features built into each of the outputs. Under voltage sensing means that when a USR V+ voltage of less than 10V is applied, the output will become inactive. Thermal protection, for short circuit and over dissipation, also causes the output to become inactive. If the combined current of all the X5 outputs exceeds 5A, there is the possibility of blowing an internal SMD fuse, which is not easily replaceable and is non-serviceable. If a hardware fault is suspected on these outputs, the condition can be checked (by the user’s program) using the Mint keyword MISCERROR. If the outputs are used to directly drive a relay or an inductive load, a suitably rated flyback diode must be fitted across the relay coil, observing the correct polarity. This is to ensure that an output is protected from the back-EMF generated from the coil when it is de-energized.

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