TRACO POWER HIER466513P1221 T1023-08C Industrial Power Supply – T1023 Series

TRACO POWER HIER466513P1221 T1023-08C — 192 W DIN Rail Power Supply for Industrial Control Architectures

The TRACO POWER HIER466513P1221, product series designation T1023-08C, is a 192 W single-output switched-mode power supply (SMPS) designed for continuous-duty operation in industrial control panels, process automation cabinets, and field marshalling enclosures. Rated at 24 VDC / 8 A output with a universal wide-range AC input spanning 85–264 VAC, this unit eliminates the need for region-specific power supply variants across global machine builds. Its DIN rail form factor (EN 60715 TS35) integrates directly into standard IEC 61439-compliant low-voltage switchgear assemblies without additional mounting hardware.

Within a control loop, the T1023-08C occupies the primary power distribution node — converting mains AC to a regulated 24 VDC bus that feeds PLC CPUs, distributed I/O modules, field transmitters, solenoid valve drivers, and HMI panels. The unit’s output voltage is adjustable ±15% via a front-panel trimmer, allowing engineers to compensate for cable voltage drop in large panels or to match the nominal supply requirements of legacy field devices rated at 20–28 VDC. At full 8 A load, the unit sustains output regulation within ±1% line/load combined, ensuring that 4–20 mA analog loops and HART-enabled transmitters receive a stable reference supply free from ripple-induced measurement error.

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Technical Parameters

Hardware Logical Analysis

The T1023-08C is built on an active power factor correction (PFC) front-end topology followed by an isolated DC-DC stage using a phase-shifted full-bridge (PSFB) converter. This two-stage architecture is deliberate: the PFC pre-regulator maintains input current sinusoidal and in phase with the mains voltage (PF ≥ 0.95), which reduces harmonic distortion injected back into the plant distribution network — a requirement under IEC 61000-3-2 Class A for equipment above 75 W. The PSFB stage then operates at a fixed switching frequency (typically 100–150 kHz), enabling the use of a compact high-frequency transformer with low leakage inductance, which directly constrains output ripple to ≤ 150 mVpp.

The galvanic isolation barrier between primary and secondary is implemented via a reinforced insulation transformer rated to withstand 3,000 VAC dielectric test voltage, satisfying the creepage and clearance requirements of IEC 62368-1 for Overvoltage Category III installations — the category applicable to distribution panels fed directly from the building’s main switchboard. This isolation level is critical in process plants where ground potential differences between control room and field junction boxes can reach several hundred volts during ground fault events.

EMC performance is addressed at three levels. First, a multi-stage LC input filter attenuates conducted emissions on the mains line to comply with EN 55032 Class B limits, protecting adjacent instrumentation from switching noise coupling through shared AC distribution. Second, the PCB layout routes high-frequency switching nodes away from the output terminal block, and the secondary-side ground plane is stitched to the chassis at a single low-impedance point to prevent circulating currents. Third, the metal enclosure provides shielding against radiated emissions, with the chassis bonded to the DIN rail for equipotential bonding continuity across the panel.

The over-current protection (OCP) circuit uses a current-sense resistor in the primary switching loop, with the trip threshold set at approximately 110–120% of rated output current. Upon OCP activation, the controller enters a hiccup-mode auto-restart cycle — attempting restart at a low duty cycle every few hundred milliseconds — rather than latching off permanently. This behavior is intentional for industrial applications: a momentary inrush from a large capacitive load (e.g., a servo drive DC bus) will not permanently disable the supply, yet a sustained short circuit will keep average power dissipation low enough to prevent thermal damage to the output stage.

System Integration Benefits

• Deterministic 24 VDC Bus Stability: Output regulation ≤ ±1% line/load combined ensures that PLC digital input threshold voltages (IEC 61131-2 Type 1: V_IH ≥ 15 V) are met across all load transients, eliminating spurious input state changes during motor start sequences.
• Active PFC Reduces Panel Wiring Costs: PF ≥ 0.95 at full load reduces reactive current on the AC feed cable, allowing engineers to specify a smaller cross-section for the mains input conductor — a measurable saving in large multi-PSU panels.
• ≥ 20 ms Hold-up Time Bridges PLC Scan Cycles: During brief mains interruptions (voltage dips per IEC 61000-4-11 Class 3), the 20 ms hold-up prevents the 24 VDC bus from collapsing before the PLC CPU completes its current scan cycle and executes a controlled shutdown sequence.
• Wide Input Range Simplifies Global Machine Variants: A single T1023-08C covers 85–264 VAC, meaning OEMs ship one machine configuration to North America (120 VAC), Europe (230 VAC), and Asia (220 VAC) without a tap-switch or transformer change.
• Output Voltage Trimmer Compensates Cable Drop: In panels where the PSU is located more than 10 m from the load (e.g., remote I/O stations), the ±15% output adjustment allows the engineer to pre-compensate for resistive drop, maintaining 24 VDC ±5% at the load terminals as required by most PLC I/O module specifications.
• OTP Protects Against Blocked Ventilation Faults: The over-temperature protection circuit monitors the internal heatsink temperature. If airflow is blocked by cable congestion or a failed panel fan, OTP shuts down the supply before the electrolytic capacitors on the output stage reach their rated temperature limit — extending capacitor service life and preventing unplanned shutdowns.
• Hiccup-Mode OCP Supports Capacitive Load Inrush: Servo drives and variable-frequency drives (VFDs) present large capacitive DC bus loads at power-up. The auto-restart OCP behavior allows the PSU to supply the inrush current in short bursts until the load capacitors charge, after which steady-state operation resumes — without requiring an external soft-start relay.
• Reinforced Isolation Supports IT/TN-S Network Architectures: The 3,000 VAC isolation rating and compliance with IEC 62368-1 OVC III allow the T1023-08C to be installed on the load side of a residual current device (RCD) in TN-S earthing systems without triggering nuisance trips from leakage current, as the primary-to-secondary leakage current is maintained below 3.5 mA.

Quality Assurance & Global Logistics

Every TRACO POWER HIER466513P1221 unit dispatched from our Xiamen, China facility is a genuine factory-original component sourced through verified industrial distribution channels. TRACO POWER’s manufacturing process applies 100% electrical testing at the production line, including output voltage accuracy, efficiency measurement, and protection circuit verification. Units are shipped in original anti-static packaging with intact factory seals, date codes, and CE/UL markings.

Before dispatch from Xiamen, our technical team performs a secondary incoming inspection: visual authentication of label typography and holographic markings, functional power-on verification at no-load and 50% load, and output ripple measurement with a 20 MHz bandwidth oscilloscope. Units that do not meet factory datasheet tolerances are quarantined and returned to the supply chain — none are reworked or relabeled.

Logistics from Xiamen reach major industrial hubs on the following typical transit schedules: Hong Kong / Shenzhen same-day courier; Singapore, Tokyo, Seoul 2–3 business days via DHL Express or FedEx International Priority; Frankfurt, Amsterdam, Chicago 3–5 business days; São Paulo, Johannesburg 5–7 business days. All shipments include a commercial invoice with HS Code 8504.40 (static converters) for customs clearance. Export documentation — including packing list, certificate of origin, and test report — is provided as standard for orders requiring customs broker support.

A 12-month warranty covers manufacturing defects from the date of dispatch. Warranty claims are processed with a replacement-first policy: a replacement unit is dispatched within 48 hours of fault confirmation, and the defective unit is returned via prepaid label. Certificate of Conformance (CoC) documents are available upon request for MRO procurement teams and quality management systems operating under ISO 9001 or IATF 16949 frameworks.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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