Product Overview

The Digitronic 1756-DICAM — marketed as the CamCon DC1756 — is a high-performance digital cam switch unit (programmable limit switch, PLS+) engineered by Digitronic Automationsanlagen GmbH in Germany to plug directly into the Allen-Bradley ControlLogix 1756 chassis. Available through the Rockwell Encompass program, the 1756-DICAM serves as a dedicated Boolean processor that executes cam-switching logic entirely on its own Motorola ColdFire CPU, entirely independent of the ControlLogix controller’s scan cycle. This architecture delivers switch-on/switch-off reaction times of approximately 70 microseconds, ensuring that outputs transition at precisely the programmed angular or linear position regardless of controller loading — a level of determinism that conventional PLC output modules cannot matchhvsgroup.fr+2.

Electronic cam switching replaces mechanical camshafts, limit switches, and rotating cam stacks with fully programmable electronic precision. The 1756-DICAM provides 24 galvanically separated, short-circuit-proof 24V DC outputs (0.2A each, 0.4A at 50% duty) and 8 galvanically separated inputs as standard, with total I/O expandable to 200 inputs and 200 outputs through the external interface when paired with Digitronic expansion modules. Standard configuration supports 1,200 programmable cams, expandable to 4,000 or even 10,000 cams depending on the selected EEPROM memory option (16 KB, 48 KB, or 128 KB), with up to 32,768 program slots for product-specific cam-set libraries and rapid format changeovertcisupply.com+1.

Position feedback is accepted through a rich suite of measuring-system interfaces: SSI absolute encoders (Stegmann SSI standard, up to 300 m cable, with a 1000 m option), incremental 24V PNP or Hiperface signal inputs, and parallel measuring systems. Speed-dependent actuators are handled by the built-in delay-time compensation (0 to 9,999.9 ms) and non-linear speed compensation, ensuring that glue nozzles, cut-off knives, ejectors, and valves fire at the same physical location across the full speed range of the machine. Although the 1756-DICAM is now designated discontinued-by-manufacturer, the substantial installed base in packaging, printing, converting, and metal-forming machinery worldwide makes it a continuing priority for MRO stocking and lifecycle replacementtcisupply.com+2.

Technical Specifications