Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 6DP1995-8AA |
| Manufacturer | Siemens |
| Product Type | Analog Signal Coupling I/O Module (FUM-class) |
| Compatible System | Siemens Teleperm M / SPPA-T3000 DCS |
| Number of Channels | 8 independent, individually configurable |
| Supported Input Signals | 0/4–20 mA, 0/2–10 V (per-channel selection) |
| Resolution | 12 bit + sign |
| Isolation | Optical isolation, channel↔channel & channel↔backplane |
| Supply Voltage | 24 V DC (–20 % / +25 %) |
| Typical Power Consumption | ≈ 2.5 W |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | –25 °C to +70 °C |
| Relative Humidity | 5 % to 95 % (non-condensing) |
| Mounting | Teleperm M dedicated rack / DIN-rail adapter option |
| Diagnostics | Per-channel open-wire, overload, supply monitoring via LED & backplane |
Main Features and Advantages
Configurable 8-channel architecture. The Siemens 6DP1995-8AA gives engineers per-channel freedom to mix current-loop transmitters and voltage-output sensors on the same physical card. A single rack slot can therefore handle, for example, four 4–20 mA pressure transmitters from a boiler drum, two 0–10 V positional feedback signals from a damper drive, and two spare channels awaiting future loop additions—all without changing hardware. This reduces spare-parts SKU count and simplifies cabinet design in multi-loop process trains.Robust optical isolation against industrial noise. In power-plant and heavy-process cabinets, VFD switching, large-motor starting surges, and lightning-induced ground potential rise are daily realities. The Siemens 6DP1995-8AA uses optocoupler barriers on every channel and again between the field side and the DCS backplane bus, effectively breaking ground loops and blocking common-mode transients before they reach the controller. Channel-to-channel isolation further prevents a fault on one loop (e.g., a shorted 24 V supply trace) from contaminating neighboring measurements—critical when one channel monitors a turbine bearing and another monitors a reactor jacket temperature on the same card.Integrated diagnostics that shorten MTTR. The module continuously monitors each channel for open-wire (broken 4–20 mA loop), over-range, and supply anomalies, reporting status through front-panel LEDs and backplane diagnostic telegrams. When a field technician sees a red LED on a specific channel of the Siemens 6DP1995-8AA, they know immediately whether to check the transmitter, the marshalling-terminal fuse, or the loop wiring—no guessing, no swapping cards “just to test.” In plants where one hour of unplanned downtime can exceed five figures in lost margin, this diagnostic granularity pays for itself rapidly.Legacy continuity and long-term availability. Because the Teleperm M / SPPA-T3000 installed base spans decades, Siemens and authorized spare-part specialists continue to stock and refurbish the Siemens 6DP1995-8AA even as newer S7-400 / PCS 7 platforms dominate greenfield projects. For asset managers running life-extension programs on 20-year-old units, this means they can replace a failing analog coupler today with an identical functional replacement, keep the original marshalling, and defer a full DCS migration until budget allows. The module’s mechanical footprint, connector keying, and backplane timing are all backward-compatible with the original Teleperm M rack design.Low drift, stable conversion chain. The 12-bit-plus-sign A/D path, combined with onboard temperature compensation and digital filtering, keeps long-term gain and offset drift within tight bounds across the 0…+60 °C operating envelope. For process loops where a 0.5 % error translates into meaningful steam-bypass or combustion-upset consequences, the Siemens 6DP1995-8AA provides measurement consistency that software calibration alone cannot recover on lesser hardware.
Reviews
There are no reviews yet.