Design
Product colour	Green
Country of origin	China
Internal
Features
HP segment	Business
Logistics data
Harmonized System (HS) code	84733020
Other features
Compatibility	The HP Internal Serial Port (600/705/800) is compatible with the HP ProDesk 600 G4 Microtower PC; HP ProDesk 600 G4 Small Form Factor PC; HP EliteDesk 705 G4 Microtower PC; HP EliteDesk 705 G4 Small Form Factor PC
UNSPSC-code	39121408
Packaging data
Package width	389 mm
Package depth	339 mm
Package height	297 mm
Package weight	3.88 kg
Ports & interfaces
Output interface	Serial
Serial ports quantity	1
Technical details
General Product Safety Regulation (GPSR) URL	https://support.hp.com/us-en/document/ish_6126692-6126777-16?openCLC=true
Weight & dimensions
Width	85.9 mm
Depth	119 mm
Height	23.3 mm
Weight	16.16 g

The HP Internal Serial Port (type ACCS, manufacturer part number 3TK82AA) is an integrated serial connection, specifically developed for use in certain HP PC models. It serves as an internal slot expander, installed into the system platform to provide an additional serial port. Compatibility is limited to the HP ProDesk 600 G4 Microtower PC, HP ProDesk 600 G4 Small Form Factor PC, HP EliteDesk 705 G4 Microtower PC, and HP EliteDesk 705 G4 Small Form Factor PC. These devices belong to the HP Business segment, indicating intended use in professional work environments where reliability and integration into existing systems are prioritized.

Applications

The internal serial connection is used in environments where older or specialized devices must be connected via serial interfaces (RS-232). This includes, for example, industrial control devices, measuring instruments, POS terminals, or other legacy systems that lack USB or Ethernet interfaces. The internal installation enables compact integration without additional external adapters or cables, which is particularly advantageous in tight enclosure configurations.

Functions and Equipment in Detail

The connection features a single serial port serving as an output interface. The product color is green, which is typically used for serial interfaces in PC hardware to distinguish them from other interfaces such as USB or Ethernet. The installation solution is designed for use within the computer enclosure, enabling direct connection to the motherboard or system control. Precise positioning is achieved through the predefined mounting geometry of the device.

Technology Explained Simply

The serial port enables data transmission bit by bit over a single cable, with communication typically occurring via RS-232. Although this interface is outdated compared to modern standards such as USB, it remains relevant in many industrial and specialized applications. The internal installation ensures the port is directly available within the system, without requiring external adapters or additional power supply. The module dimensions are 85.9 mm (width), 119 mm (depth), and 23.3 mm (height), representing a compact design that fits into the designated systems.

Compatibility and Accessories

The connection is exclusively designed for the specified HP PC models (600/705/800 series). Use in other systems is not intended and is not supported. Compatibility is limited to the specific motherboard and enclosure configurations of these models, which feature corresponding slots for slot expanders.

Installation and Mounting

Mounting is performed by inserting the module into the designated slot within the PC enclosure. Installation requires opening the enclosure and inserting the module into the appropriate socket. No additional power supply is required, as the port is powered by the system power supply.

Operational Advantages

The internal serial connection provides a reliable and stable interface for connecting legacy devices. The internal installation reduces the number of external cables and adapters, improving system organization and reducing the risk of connection errors. The green color of the connector facilitates identification within the system. Use in business systems ensures high compatibility with existing work environments and IT infrastructures.

Manufacturing and Logistics Information

The product is manufactured in China and designed for use in the business segment. Packaging dimensions are 389 mm (width), 339 mm (depth), and 297 mm (height), with a package weight of 3.88 kg. The total carbon dioxide footprint of the product is stated as 10 kg CO2e. The Harmonized System (HS) code is 84733020.