Altoc Vtm 10 May 2026

For RTDs: Ensure you enable the appropriate wire configuration in the software. Default is 3-wire.

A: The device will restart. Outputs go to the pre-set failsafe state for 10 seconds. Never update firmware in a live process without bypassing the safety logic. altoc vtm 10

A: Yes. The analog output is independent. However, if you change the input range via Modbus, the analog output updates immediately. For RTDs: Ensure you enable the appropriate wire

| Symptom | Likely Cause | Solution | | --- | --- | --- | | Green LED off | No power / reversed polarity | Check 24 VDC supply; swap terminals 1 and 2. | | Red LED flashing at 1 Hz | Sensor break or short | Check continuity of thermocouple/RTD. Is cable cut? | | Output stuck at 3.8 mA | Under-range condition | Input signal is below 0% of span. Check sensor zero. | | Output stuck at 20.5 mA | Over-range or burnout set | Input exceeds 105% of span, or sensor is broken with "high" burnout selected. | | Fluctuating output (noise) | VFD interference or filter off | Increase digital filter value; check shielding on input wires. Use twisted pair. | | No Modbus communication | Wrong baud rate / address | Verify settings match master. Ensure termination resistor (120Ω) is present on long runs (>100 m). | Outputs go to the pre-set failsafe state for 10 seconds

| Feature | Altoc VTM 10 | Phoenix MINI MCR | Weidmüller ACT20X | | --- | --- | --- | --- | | Universal input (TC, RTD, V, mA) | Yes (all in one) | No (requires separate modules) | Yes | | NFC configuration | Yes (unique) | No | No | | Width (mm) | 22.5 | 22.5 | 22.5 | | Price (approx. USD) | $189 | $215 | $245 | | Modbus RTU onboard | Yes (standard) | Optional ($$) | Optional ($$$) | | Response time | <50 ms | <30 ms | <25 ms | | Warranty | 5 years | 3 years | 3 years |