Current-transformer energy metering for harsh environments
The Siemens 6AG1134-6PA01-7BU0 is a SIPLUS ET 200SP analog input module — the AI Energy Meter CT ST variant — built on the standard 6ES7134-6PA01-0BU0 but hardened with conformal coating for extreme conditions. It accepts 1 A or 5 A current transformer secondaries and mounts on a BU type U0 base unit. The SIPLUS designation means it is rated for −40 °C to +70 °C ambient, compared to 0–60 °C on the standard version, and tolerates condensing humidity and corrosive atmospheres (ISA-S71.04 G1/G2/G3 severity levels).
On a remote wellhead RTU, a cold-storage conveyor, or an outdoor compressor skid, this module reads the CT signals directly at the I/O island — no separate transducer, no 4–20 mA converter loop, no heated enclosure for the electronics.
Technical profile
| Parameter | Value |
|---|---|
| Product family | SIPLUS ET 200SP analog inputs |
| Function | AI Energy Meter, CT ST |
| CT input | 1 A or 5 A secondary |
| Standard base | 6ES7134-6PA01-0BU0 |
| Conformal coating | Yes |
| Ambient temperature | −40 °C to +70 °C |
| Base unit type | BU type U0 |
| Weight | 55 g |
| Pack quantity | 1 |
| ECCN | EAR99H |
| RoHS | Compliant |
SIPLUS vs. standard — what the coating buys you
The standard 6ES7134-6PA01-0BU0 covers indoor panel environments. The SIPLUS 6AG1134-6PA01-7BU0 adds:
- Conformal coating on the PCB — protects against condensation, salt spray, and light chemical exposure
- Extended temperature range — cold-start at −40 °C without a cabinet heater
- Corrosion resistance — rated for ISA-S71.04 severity levels up to G3 (moderate industrial)
- Same firmware, same GSDML — drops into a TIA Portal project as the standard variant; no separate hardware support package
Stock and ordering
We carry position stock of 48 units with same-day dispatch. For project quantities with scheduled delivery dates, request a consolidated BOM quote — we bundle ET 200SP I/O modules, base units, and bus adapters on a single proforma.