AMS DCB-274 manual Typical User Input Circuit, Output Ports

ADVANCED MICRO SYSTEMS, INC. HARDWARE

4.6 - 30 Vdc

+

PLC Signal

STD

Signal

5V Pin

VIO

Pin

Input

Pin

GND

Pin

Connector

		+5	Internal Power Supply
		VIO
		10k
	10k		Comparator
		VIO/2	CPU
1	STD	10k
2
3	PLC

To other comparators

Typical User Input Circuit

(Step, Direction, Ports 1, 2, 3, 4 (used as an input), Jog (3), Limits, Home, Go and Soft Stop)

Output Ports

Two user output ports are provided on the DCB-274 with a power FET output circuit capable of sinking up to 2 amps DC. They cannot be converted to a sourcing mode. If a source signal is necessary, a relay should be installed.

The outputs DO NOT include clamping diodes attached to VIO. There is provision for diodes (D1, D2) on the board .If these diodes are installed; VIO MUST BE EQUAL TO OR HIGHER THAN THE DEVICE POWER SOURCE VOLTAGE. If a 24-volt solenoid valve is to be driven, the VIO input must be at 24 volts. Because VIO also defines the logic input levels, this can be a problem. If your design is to drive inductive loads such as relay or motor coils, you must implement external clamp diodes as required. R3 and R4 should also be removed.

ANY O F THESEMODIFICATIONS MUST BE PERFORMED BY TECHNICALLY QUALIFIED PERSONNEL.

Port 4 (Configurable user port with JP1 and JP2)

This port can be configured as either an input port (as described above) or an output port.

Port 4 defined as:	JP1	JP2	Comment
Input	2-3	Yes	Reference “l 16” (lower case L)
			command in the software section.
Output	1-2	None
PIN 1
			VIO
			+

			Load
Optional Clamp
Comparator			-
	3	1	I/O Connect
VIO/2	JP-1
JP-2			Mosfet
SMC-26
Microprocessor

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