Spare part for ET 200X — what it covers
The Siemens 6ES7141-1BF30-0XB0 is an extended module EM141 for the ET 200X distributed I/O family, carrying 8 digital inputs at 24 V DC with 5-pole M12 connectors. The description flags it as a spare part, so this is the replacement unit for an existing field installation, not a new-design pick.
Input voltage range and signal thresholds
Signal '0' is recognised between -3 and +5 V; signal '1' between 13 and 30 V. That 13 V threshold is typical for 24 V DC sensor inputs — it gives noise margin below the nominal 24 V rail. The module also accepts 2-wire sensors, with a permissible quiescent current up to 1.5 mA.
Diagnostics and interrupt handling
Channel-by-channel wire-break and short-circuit detection are standard, with a red channel fault LED per input. A parameterisable diagnostic alarm and hardware interrupt feed the PLC — useful for catching a broken sensor lead on a conveyor line before the cycle faults out. The input delay is selectable at 0.5, 3, 15, or 20 ms, matching the response to the sensor type and process speed.
Power draw and isolation
Typical power loss is 1.5 W from the backplane bus, with a max draw of 30 mA at 5 V DC. Isolation between circuits is tested at 500 V DC, and between different circuits at 75 V DC / 60 V AC. There is no potential separation between the digital inputs themselves — adjacent channels share a common reference.
Sourcing reality — spare part channel
This is a current-production spare part according to Siemens lifecycle data. No direct stock-holding claim; the lead time depends on the quantity and the channel at that moment.