Product Overview

The 6DD1642-0BC0​ is a Siemens SIMADYN D EA12 analog output module, the external 8-channel voltage-AO slice that feeds ±10 V analog setpoints from the SIMADYN D rack out to the drive world — thyristor converters, exciter stages, governor actuators, and analog chart recorders. Belonging to the SIMADYN D (Siemens’ large-drive DSP platform preceding the SINAMICS DCM / SIMOTION transition), the 6DD1642-0BC0​ plugs into the EA external module bay and routes its eight analog outputs through a 20-way ribbon cable connector X5 on the front fascia. Each channel delivers ±10 V with 14-bit resolution (equivalently 1 mV step size), loaded up to 10 mA per channel, and the entire X5 bus plus its associated dual test sockets must collectively stay under 10 mA total — a constraint engineers learn quickly when tying multiple chart pens or galvanic isolators to the same header.

Address assignment on the 6DD1642-0BC0​ is handled by a programmable address decoder tied to the rack slot position, so the same EA12 module can land at different base addresses simply by moving slots, without DIP-switch fiddling. Output format per channel is configurable via a 2^n multiplication factor written into the SIMADYN D project (PM4/PM5 processor code), letting a ±10 V physical range represent anything from 0–100% speed reference to −500…+500 rpm scaled internally. A secondary 50-way ribbon X6 exists on some frontplate revisions but is typically unused on the EA12 variant. Siemens placed the 6DD1642-0BC0​ into PLM PM500 (discontinued Oct 1, 2017, non-RoHS) with the broader SIMADYN D exit, meaning remaining new-old-stock and professionally refurbished units are now MRO-strategic for steel, cement, marine propulsion, and hydroexciter lines that still standardize on SIMADYN D PM4/PM5 racks and are not yet migrated to SINAMICS DCM or S120. For those plants, the 6DD1642-0BC0​ is not a generic AO card — it is the specific 8-channel analog face that the PM processor’s closed-loop blocks expect to see at the EA bay.

Technical Specifications

Main Features and Advantages

Eight ±10 V analog outs with 14-bit fineness

The core of the 6DD1642-0BC0​ is the eight voltage outputs, each swinging −10 V to +10 V with 14-bit granularity — effectively 1 mV per LSB. In a SIMADYN D rolling-mill stand or hydroexciter cubicle, those eight channels typically map to: speed reference out to the converter, field-current setpoint, armature-voltage reference, torque-limit analog to a supervisor recorder, two spare chart-pen drives, and two user-defined (e.g., motor-airgap or bearing-temperature scaled outputs). The 14-bit depth matters — a 20-bit modern card would be overkill on a ±10 V galvanic link that terminates on a converter’s 0–10 V summer with its own quantization; the 6DD1642-0BC0​ matches the SIMADYN D PM4/PM5 internal math width cleanly.

Slot-based address decode, no DIP switches

A small but meaningful detail: the 6DD1642-0BC0​ derives its base address from which EA-bay slot it occupies, programmed through the SIMADYN D configuration tool (the PM processor’s project file maps EA12 channels to global data vectors). This means sparing is simpler — any 6DD1642-0BC0​ can go into any EA slot, and the project dictates the mapping, not the hardware sticker. Swapping a faulty for a cold-spare 6DD1642-0BC0​ is therefore a “plug-and-go” action provided the rack powers down cleanly — no address-wheel turning, no DIP verification.