Galil DMC-1700, DMC-1800 user manual Digital Inputs, Figure A.5 – IOM-1964Chip Configuration Layout

Resistor Pack for outputs

Resistor Pack for inputs

Resistor Pack for outputs

RP03 OUT
RP04 IN	U03	U04	Input Buffer IC's
		IN
RP02	U01	U02	Output Buffer IC's
OUT		OUT
			Indicator LED's
D0			Resistor Pack for
			LED's
C6
RP01OUT	17 18 19 20 21 22 23 24
	Bank 0

Figure A.5 – IOM-1964 Chip Configuration Layout

All of the banks have the same configuration pattern as diagrammed above. For example, all banks have Ux1 and Ux2 output optical isolator IC sockets, labeled in bank 0 as U01 and U02, in bank 1 as U11 and U12, and so on. Each bank is configured as inputs or outputs by inserting optical isolator IC’s and resistor packs in the appropriate sockets. A group of eight LED’s indicates the status of each I/O point. The numbers above the Bank 0 label indicate the number of the I/O point corresponding to the LED above it.

Digital Inputs

Configuring a bank for inputs requires that the Ux3 and Ux4 sockets be populated with NEC2505 optical isolation integrated circuits. The IOM-1964 is shipped with a default configuration of banks 2- 7 configured as inputs. The output IC sockets Ux1 and Ux2 must be empty. The input IC’s are labeled Ux3 and Ux4. For example, in bank 0 the IC’s are U03 and U04, bank 1 input IC’s are labeled U13 and U14, and so on. Also, the resistor pack RPx4 must be inserted into the bank to finish the input configuration.

DMC-1700/1800 Appendices • 227