What you're ordering
The TM241CEC24R: Key network ports: one 10BASE-T/100BASE-TX Ethernet port supporting Modbus TCP, Ethernet/IP, OPC UA server, web server, SNMP, and email; one CANopen interface (with selectable bit rates up to 1 Mbit/s); and a serial port configurable for RS232 or RS485 at up to 115.2 kbit/s. There is also a USB port at 480 Mbit/s for programming.
What this means for your panel and wiring
The unit mounts on a TH35-15 or TH35-7.5 DIN rail (or panel with a fixing kit). Dimensions: 150 mm wide, 95 mm deep, 90 mm tall. Inputs are sink or source (24 V DC), 4.7 kΩ impedance. Outputs: 2 relay outputs (no protection) and transistor outputs with short-circuit and overload protection, automatic reset (10 ms for standard outputs, 12 ms for fast outputs). The fast outputs can handle pulse trains up to 200 kHz (single-phase or pulse/direction) or 100 kHz A/B quadrature, which is helpful for simple motion or high-speed counting. Sensor power is supplied from the controller: 24 V DC, 400 mA. Plan your external loads — that 400 mA is shared across all sensors powered by that terminal, not per-channel.
Memory, backup, and real-time clock
64 MB system RAM (program execution), 128 MB built-in flash for program storage. A BR2032 lithium battery maintains the real-time clock and user program for up to 2 years at 25°C. Clock drift is ≤60 seconds per month at 25°C. Backup time specs are typical — expect less at higher ambient. Real-time clock is present and backed by the battery. No need for external time sync unless you require higher accuracy than the 60 s/month drift.
Ruggedization and compliance
Carries UL 508, CSA C22.2, IEC 61131-2, and marine approvals (LR, ABS, DNV, GL). Pollution degree 2, shock 15 gn / 11 ms, vibration 3.5 mm at 5–8.4 Hz then 3 gn to 150 Hz, altitude up to 2000 m operating / 3000 m storage. Surge immunity per IEC 61000-4-5: 2 kV common mode on AC power lines, 1 kV differential mode on power lines, 1 kV common/differential on relay outputs, 1 kV on I/O and transistor outputs. That gives a baseline for installation in typical industrial settings but not heavy surge environments without additional protection.
