OVERVIEW

Official designation: Allen-Bradley 2755-DH1 (Bulletin 2755, Multi-purpose Bar Code Workstation)

Role/Application: This dedicated decoder unit processes data from one attached scanning device, supporting attended (hand-held) and unattended (stop-n-scan) operations, and communicates results to a host via RS-232/TTL interfaces.

KEY SPECS SUMMARY

Power: 90 to 264 Volts AC

Interfaces / Ports: 1 Scanner port, AUX, HOST, Terminal ports

Indicators: 5 status LEDs

Operating Temp: 0 to 40 degrees C

Platform / Compatibility: Compatible with Allen-Bradley 2755 scanners

Limit: Single scanner port

Lifecycle: Discontinued by manufacturer, varies by revision

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the five status indicators available on the 2755-DH1 workstation?

A: The five LED indicators are power, laser on, valid read, transmit, and receive.

Wiring & Installation:

Q: What is the maximum distance for DH1 decoders in a multi-drop RS-232 network configuration?

A: The RS-232 driver allows a maximum distance of up to 50 feet between DH1 decoders on the network.

Troubleshooting & Compatibility:

Q: Can the 2755-DH1 decoder communicate with host devices using RS-422 and RS-485 protocols?

A: Yes, the decoder can communicate with host devices using RS-232, RS-422, and RS-485 with the DH485 protocol.

Replacement & Upgrades:

Q: Is a special adapter cable required to connect some Series B decoders to a hand-held scanner?

A: Yes, a special adapter cable such as the 2755-NC16 may be required to connect the scanner to some Series B decoders.