TRACO TIS600 power supply

Fault 2: Failure to switch or immediate shutdown after switching off the mains power. Firstly, confirm if the voltage of the battery pack is higher than 22V. If it is lower than this value, the Battery Low relay will activate, indicating that the battery may be nearing depletion. Check if the electronic fuse of the battery pack has tripped, if the battery cable is securely fastened, and if the wire diameter meets the requirement of 4.0 mm ². Confirm if the Pin 7/8 battery mode activation wiring is correct. If the contact is not closed, the battery mode may not be activated. If the load time is extremely short after switching, the load current and 7 Ah battery capacity should be calculated, and the battery should be checked for aging. When charging the battery, the output current will decrease by 1.4 times the charging current. If the load approaches full load, switching may trigger overload protection at the moment.

Fault 3: Battery Low alarm is frequent or false positive. Measure whether the battery voltage drops below 22V under load. If it is normal under no-load and shows a significant decrease under load, it is usually due to battery aging or insufficient capacity. Check if the charging has been insufficient for a long time. Setting the charging current too low, poor contact in the charging circuit, and high battery temperature can all cause undercharging. The battery testing function will periodically load the battery for a short period of time. If the internal resistance of the battery is high, it may trigger an alarm. At this point, do not simply short-circuit the alarm contacts, but replace the battery pack or adjust the charging parameters.

Fault 4: AC Powerfail alarm does not work or malfunctions. Confirm whether the input voltage is truly below the 93/187 VAC threshold, and measure whether the Pin 2-3 contacts of relay A are closed logically. If the contact is connected to the input module of the PLC, please note that the contact capacity is only 60 VDC/0.36 A and cannot be directly connected to high voltage or high current circuits. If frequent electromagnetic waves cause false alarms, the quality of the incoming voltage and whether the power input terminals are loose should be checked.

Fault 5: Insufficient output current or frequent overload protection. First, distinguish whether it is load overcurrent or charging occupancy. TIS600-124UDS has a maximum of 24 A, but 1.4 times the charging current will be deducted when charging the battery. If charged at 2.4 A, the available load current is about 20.6 A. Then check if the ambient temperature exceeds 50 ° C, and if it does, reduce the rating by 2%/° C. At 70 ° C, the available power significantly decreases. If the output is short circuited, the power supply enters a constant current limit of about 110% and automatically restarts; If there is a short circuit in battery mode, the system will shut down. It is necessary to eliminate the short circuit and check the battery quick fuse.

Fault 6: Short battery life or battery pack overheating. Check if the charging voltage is too high, if the charging current exceeds the maximum allowable value of the battery pack, and if the ambient temperature is too high. The battery pack should use matching charging voltage and temperature compensation, as long-term high-temperature float charging will accelerate water loss. It is recommended to conduct regular battery tests, record the backup time, and replace the entire set when the capacity significantly decreases. Do not mix old and new batteries.

Replacement and maintenance suggestions

When replacing TIS600-124UDS, the input voltage level, output load, battery pack model and capacity, charging current setting, Pin 7/8 wiring, AC Powerfail and Battery Low contact usage of the original system should be recorded first. Before installing the new power supply, confirm the DIN rail buckle and terminal torque. After wiring, do not connect the battery first. Measure the 24 VDC output and alarm contact status when powered on without load; Connect the battery pack again and measure the charging voltage and current; Perform a final power outage simulation to confirm that the switching time, load holding, and alarm actions meet the requirements. If the system has safety shutdown logic, power down testing should be conducted within the allowed maintenance window.

Daily maintenance should regularly check the cabinet temperature, battery appearance, terminal fastening, and battery backup time. The MTBF of TIS600-124UDS is about 300000 hours at 25 ° C, but the battery is a consumable and has a standby life of about 4-5 years at 20 ° C. The actual life is greatly affected by temperature and depth of charge and discharge. Only by designing the power supply, battery pack, charging parameters, alarm contacts, and load derating as a whole can TIS600-124UDS truly play an uninterrupted power supply role in the process control system, rather than becoming a new fault point when a fault occurs.