Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 6DS1618-8CA |
| Manufacturer | Siemens |
| Product Type | Binary (Digital) Input Module, 48-Channel |
| Input Voltage Range | 24 V DC ±20 % |
| Number of Inputs | 48, galvanically isolated (group-to-earth) |
| Input Current | ≈ 4 mA typical @ 24 V DC |
| Switch Threshold | ON ≥ 15 V, OFF ≤ 5 V |
| Response Time | ≤ 3 ms (input → backplane) |
| Isolation Voltage | 1.5 kV AC, group-to-earth |
| Driver Blocks | PBE & PRA (testable, redundancy-ready) |
| Operating Temperature | 0 °C to +60 °C (rack ambient; storage –25 °C to +85 °C) |
| Dimensions (L×W×D) | ≈ 243 × 180 × 30 mm (6DS Eurocard form) |
| Weight | ≈ 0.66–0.70 kg |
| Mounting | 6DS rack / Teleperm M/ME backplane slot |
| Protection | Reverse polarity, surge suppression, IP20 (module level) |
Main Features and Advantages
High-density acquisition in a single slot. The 6DS1618-8CA delivers 48 isolated binary inputs in one 6DS-width card, letting system integrators pack large switch-count cabinets—typical in turbine auxiliaries, burner management, and batch sequencing—without proliferating rack slots. This density directly reduces backplane cost, cabinet footprint, and wiring termination labor.
Redundancy-native driver architecture. Unlike generic digital-input cards, the 6DS1618-8CA embeds Siemens PBE (Binary Input Driver) and PRA (Binary Output Driver / testable return path) blocks. In a redundant Teleperm M/ME pair, this lets the module participate in supervised voting and wire-break diagnostics without external relay logic. For plants targeting SIL-2/SIL-3 process loops, this architectural fit avoids costly workaround hardware.
Fast, clean thresholding for protective logic. With a 15 V turn-on / 5 V turn-off hysteresis window referenced to 24 V DC field supply, the module rejects contact wetting decay and induced noise on long cable runs. A ≤ 3 ms end-to-end response (field edge → backplane update) keeps trip and interlock latencies predictable even when cascaded through PBE/PRA supervision.
Per-channel visibility and online health. Each of the 48 points carries an LED state indicator visible at the rack front, and the Teleperm OS can read channel-level diagnostics through the backplane—open-wire detection via the PBE/PRA test cycle, group isolation integrity, and module presence. Maintenance teams can localize a failed limit-switch loop without pulling wires or swapping cards blind.
Ruggedized for process DCS duty. The 6DS1618-8CA is built for 0…+60 °C rack ambient, 5–95 % non-condensing humidity, and group isolation that stands up to switchyard-induced transients. Reverse-polarity and surge clamping on the 24 V side protect the card when field electricians miswire a paddle-switch loop—a frequent failure mode in brownfield retrofits.
Seamless Teleperm ecosystem fit. Because the module speaks the native 6DS backplane protocol, it drops into existing Teleperm M/ME or SPPA-T3000 I/O racks with no firmware translation. For legacy Siemens S5/S7 migration projects, gateway racks can host 6DS1618-8CA cards alongside newer ET 200-class remote I/O during phased cutovers, preserving existing field cabling.
