Product Details:
SIEMENS 16114-171/7 is a MODULRAC rack chassis designed for QUADLOG and APACS+ DCS control systems, serving as the main mechanical and electrical carrier for installing various CCM, ACM, I/O and communication modules. It integrates built-in backplane bus traces, power distribution circuits and multi-slot card positions, providing stable bus communication channel and 24VDC power distribution for all inserted modules. The rack adopts heavy-duty metal frame structure with anti-vibration reinforcement design, suitable for long-term installation inside industrial control cabinets that face continuous vibration and temperature fluctuation. The internal backplane undergoes strict impedance matching processing, with shielding layout to reduce signal crosstalk and electromagnetic interference between adjacent slots, ensuring reliable high-speed bus data exchange among all control cards.
It is equipped with standard guide grooves and locking mechanisms for each slot, supporting convenient plug-in and hot replacement of compatible modules during on-site maintenance and troubleshooting, which helps maintenance staff replace faulty boards without dismantling the whole rack. The chassis has centralized power input terminals and grounding points, convenient for unified cabinet wiring and protective grounding to improve the overall anti-interference performance of the control system. Different suffix revisions correspond to different slot quantities and backplane circuit versions, this /7 version matches designated QUADLOG hardware series. Every spare rack will complete continuity test, bus signal inspection and compatibility verification before shipment to guarantee good matching with original QUADLOG modules. It is widely stocked as replacement chassis and expansion rack spare parts for legacy APACS+ process control systems.

Industry Applications: Applied in petrochemical auxiliary skids, gas flow control systems, boiler closed-loop control rooms and water treatment facilities for conventional analog signal acquisition and valve regulating output.
Note: Confirm SAM combined I/O feature and hardware revision before ordering
This is from our current stock
| A-B | 1756-CNB |
| A-B | 1756-CNB |
| A-B | 1756-CNB |
| A-B | 1756-CNB/D |
| A-B | 1756-CNBR |
| A-B | 1756-CNBR |
| A-B | 1756-CNBR |
| A-B | 1756-CNBR D |
| A-B | 1756-DMD30 |
| A-B | 1756-DMF30 |