The TM5SDM4DTRFS is a safety discrete I/O module in the Modicon TM5 family, carrying 2 sink inputs at 24 V DC and 2 source relay outputs at 24 V DC on a 25 mm wide DIN-rail slice. It is specified to SIL 3 under IEC 61508 and IEC 62061 with PL e under EN 13849-1, which is the safety-level envelope the rest of the ratings support. Safety reliability data is stated as MTTFd > 100 years, PFD < 1E-5 and PFH < 1E-9 — the numbers an assessor will look for on the safety file rather than the headline SIL claim.
Ratings that drive the panel choice
Discrete inputs run at 24 V DC across the 20.4...28.8 V supply window, with state 0 guaranteed at ≤ 5 V and state 1 guaranteed at ≥ 15 V, and the input draws 3.3 mA at 24 V DC into a 7.3 kOhm impedance. Hardware input filtering is ≤ 150 ms — the figure that matters when the loop has to ignore pulse tests from the read-back channel. The two outputs are relay outputs sourced from the 24 V DC rail across the same 20.4...28.8 V window; output logic is source, so the contact side feeds downstream actuators rather than switching to common. EMC immunity is tested to IEC 61000-4-2 (4 kV contact / 8 kV air), IEC 61000-4-3 at 10 V/m from 80...2000 MHz, IEC 61000-4-4 on power and I/O, IEC 61000-4-5 surge on power, and IEC 61000-4-6 conducted RF, with emissions to CISPR 11 — the standard panel-floor bracket. Operating temperature splits by orientation: 14...131 °F in horizontal mounting and 14...122 °F in vertical — five degrees of headroom lost when the slice is rotated, which matters in a tightly packed cabinet. Mechanical envelope is 25 mm wide × 75 mm deep × 99 mm tall at IP20, with 15 gn shock resistance and 1 gn vibration on DIN rail, so the module fits the usual TM5 slice footprint and the usual TM5 cabinet environment.
Compliance and what the nameplate carries
The standards set covers CSA C22.2 No 142, IEC 62061, IEC 61131-2, IEC 61508, UL 508 and EN 13849-1, with CE marking on the front face. Pollution degree 2 and the listed operating altitude of 0...2000 m place it in a normal industrial control room environment; the storage range of -40...70 °C exceeds the operating window as expected. Relative humidity is rated 5...95 % without condensation, which is the standard cabinet-floor envelope and does not require sealed enclosure treatment.
Diagnostics and field-side handling
The front face carries separate LED channels: one green LED per power supply, two green/red LEDs for input status, two red LEDs dedicated to safety status, and two red/orange LEDs for output status — which keeps the safety-state indication visually segregated from the plain I/O status during a fault walk-through. Electrical connection on the field side is 2-wire, matching the input sensor and relay output wiring pattern expected on a TM5 slice. The product ships one unit per package and sits in pollution degree 2 / IP20 cabinet territory, so handling on the panel build line is the usual DIN-rail snap and label.