Allen-Bradley 1747-PIC interface converter for SLC 500 PLC systems, used to connect a PC serial port to a DH-485 communication port on legacy SLC 5/01–5/03 controllers.
Good used condition with attached ribbon cable and visible wiring diagram label; ideal for maintaining older SLC 500 installations.
Brand: Allen-Bradley (Rockwell Automation)
Series: SLC 500
Catalog number: 1747-PIC
Type: Personal computer interface converter / RS-232 to DH-485 interface
Function: Bridges a PC’s RS-232 serial port to an SLC 500 processor’s DH-485 communication port for programming and diagnostics.
Typical use: Communication with SLC 5/01, 5/02 and 5/03 processors and other DH-485 devices.
Power requirements: 24 V DC (supplied externally or from connected system – see diagram on back and AB manual).
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Connections (per documentation; confirm with photos):
PC side: RS-232 serial via DB connector (through attached cable/hardware).
PLC/network side: DH-485 interface via terminal connections indicated on rear wiring diagram (Data A/Data B, 24 V, GND, Shield, etc.).
Ratings/approvals: UL and CSA listed for Class I, Groups A–D, Division 2 hazardous locations, temperature code T3C (per front label).
Mounting: Small plastic enclosure with corner mounting holes.
For full wiring and configuration, see Allen‑Bradley installation instructions 1747‑IN024.
Used, in good cosmetic and working condition as stated.
Housing shows light scuffs, marks and minor discoloration from normal use.
Front and rear labels are intact and legible, including wiring diagram and serial number.
Attached ribbon cable present with connector at the end; insulation appears intact in photos.
No additional accessories, manuals or cables included beyond the converter and attached cable.
This is a legacy interface and generally supported only with native COM1/COM2 serial ports (not with USB‑to‑serial adapters); check Rockwell’s notes before purchase.
Intended for maintenance of existing SLC 500/DH‑485 systems; newer installations typically use 1747‑UIC USB‑to‑DH‑485 converters instead.
Buyer should verify compatibility with their specific PLC model, programming software version (e.g. RSLogix 500), and PC hardware/OS.
