Graco 3A2098H important safety instructions DGM Digital Input, Isolated Logic ICs

Appendix B - Discrete Gateway Module (DGM) Connection Details

DGM Digital Input

The digital inputs function only when power is supplied to pin 51 and there is a ground connection to pin 70. See Pin References, page 118, for details. The digital input is rated at 0-30 Vdc, and requires an NEC Class 2 power supply connected to pin 51. The DGM provides optical isolation as shown in the following illustration.

•	Pins: 52 – 59, 71-78	• Maximum current draw: 3.6 mA
•	Type: Sinking

Discrete Gateway Customer Automation

D-Sub Pin 51 (Isolated

Logic Supply), 10-30 VDC

Isolated Logic ICs

Microcontroller

Optical

Isolator

Digital Input

24VDC

D-Sub Pin 70 (Isolated Ground)

3A2098H 119