4 DI / 4 DO relay mix for LOGO! expansion
The Siemens 6ED1055-1FB00-0BA1 is a LOGO! DM8 230R expansion module, designated as a spare part for the LOGO! system. The 4 digital inputs accept both AC and DC control voltages across a wide range: 115 V AC, 115 V DC, 230 V AC, and 230 V DC. This means the module can be wired directly into existing 120 V or 230 V control circuits without an additional power supply or interface relay. The 4 relay outputs are rated for 5 A with resistive loads and 3 A with inductive loads. The relay contacts handle the inrush of small contactors, solenoid valves, and indicator lamps commonly found in LOGO!-controlled panels.
Input characteristics and timing
The digital inputs have a typical signal current of 0.08 mA for a "1" signal, with a maximum permissible quiescent current of 0.03 mA for a "0" signal. This low current draw means the module presents a minimal load on the control transformer. Input filtering is built in: the transition from "0" to "1" takes a maximum of 50 ms, and from "1" to "0" a maximum of 125 ms. These debounce times are suitable for pushbuttons, selector switches, and limit switches in standard industrial applications. The module is developed in accordance with IEC 61131 and carries CE, UL, CSA, and marine approvals, making it acceptable for control panels in commercial, industrial, and marine environments.
The module measures 90 mm high, 55 mm deep, and 36 mm wide (2 spacing units). Rated for an operating temperature range of 0 °C to 55 °C with IP20 degree of protection.
The 6ED1055-1FB00-0BA1 is at a current lifecycle stage. It is sourced to order against RFQ quantities through independent distribution channels. For BOM continuity, confirm the mating LOGO! base unit compatibility and the required I/O count before specifying.