Galil DMC-2X00 user manual Standard Digital Outputs, Figure A-12

I/OCn

PWROUTn

Current

OUTCn

Figure A-12

	Vpwr	VISO
			External
L
o			Isolated

a Power

dSupply

GNDISO

The power outputs must be connected in a driving configuration as shown on the previous page. Here are the voltage outputs to expect after the Clear Bit and Set Bit commands are given:

Output Command	Result
CBn	Vpwr = Viso
SBn	Vpwr = GNDiso

Standard Digital Outputs

The I/O banks 2-7 can be configured as optically isolated digital outputs; however these banks do not have the high power capacity as in banks 0-1. In order to configure a bank as outputs, the optical isolator chips Ux1 and Ux2 are inserted, and the digital input isolator chips Ux3 and Ux4 are removed. The resistor packs RPx2 and RPx3 are inserted, and the input resistor pack RPx4 is removed.

Each bank of eight outputs shares one I/OC connection, which is connected to a DC power supply between 4 and 28 VDC. The resistor pack RPx3 is optional, used either as a pull up resistor from the output transistor’s collector to the external supply connected to I/OC or the RPx3 is removed resulting in an open collector output. Here is a schematic of the digital output circuit:

Internal Pullup

I/OCn

To DMC-2x40 +5V

1/8 RPx2

DMC-2x40 I/O

Figure A-13

1/4 NEC2505

1/8 RPx3

I/On

OUTCn

180 • Appendices DMC-2X00