Highway09a Pdf Datasheet Now

A: Unlikely. Re-check your PCB layout. The PDF datasheet’s thermal section probably recommends adding vias under the IC to a ground plane. Also verify that the SLEEP pin is not floating.

Avoid spam sites that offer executable files. Follow these safe steps:

Port A - Power & I/O (12-Pin Terminal Block) highway09a pdf datasheet

| Pin | Function | Description | | :--- | :--- | :--- | | 1 | V+ | Power Supply +24VDC | | 2 | GND | Power Supply Ground | | 3 | DI_1 | Digital Input 1 | | 4 | DI_2 | Digital Input 2 | | 5 | DI_3 | Digital Input 3 | | 6 | DI_4 | Digital Input 4 | | 7 | DO_1 | Relay Output 1 (NO) | | 8 | DO_1_C | Relay Output 1 (Common) | | 9 | DO_2 | Relay Output 2 (NO) | | 10 | DO_2_C | Relay Output 2 (Common) |

Port B - Communication (RJ45 & DB9)

| Part Number | Description | | :--- | :--- | | HW09A-STD | Standard Unit, 512KB Flash, Uncoated | | HW09A-CONFORM | Conformal Coated (Harsh Environment) | | HW09A-KIT | Unit + Programming Cable + DIN Rail Clip |

Disclaimer: Information provided in this datasheet is believed to be accurate at the time of publication. The manufacturer assumes no responsibility for any errors or omissions. Specifications are subject to change without notice. A: Unlikely

Contact Information: Highway Industrial Systems www.highway-tech.com | support@highway-tech.com

| Pin Group | Pin Numbers | Function | Description | | :--- | :--- | :--- | :--- | | Power Supply | 1, 19, 36 | ( V_BB ) | Battery/Supply voltage. Multiple pins for current distribution. | | Ground | 18, 20 | GND | Power and logic ground. Must be low impedance. | | Outputs | 2-9 | OUT0 – OUT7 | High-current outputs to load (LEDs, relays, solenoids). | | Inputs | 10-17 | IN0 – IN7 | 5V/3.3V logic control (active high). | | Diagnostics | 21 | STATUS | Open-drain output. Low = Fault detected. | | PWM/EN | 22 | EN | Enable pin (active high). Can be used for global PWM dimming. | | Current Sense | 23 | ISENSE | Analog output proportional to load current. | | Pin Group | Pin Numbers | Function

Critical Graphic from the PDF: Look for the block diagram showing the internal charge pump (for high-side drivers) or the source-ground path (for low-side drivers). This reveals if the device inverts logic or requires external flyback diodes for inductive loads.