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Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Value |
| Manufacturer | Control Technology Inc. (CTI) |
| Model / Part Number | 2501 |
| System Compatibility | CTI 2500 Series PLCs and Siemens Simatic 505 I/O Backplanes |
| Module Type | Programmable Coprocessor Module |
| Communication Ports | 2 × RS-232 / RS-422 / RS-485 Configurable Serial Ports |
| Backplane Power Consumption | 1.5 W @ +5 VDC (Supplied via backplane) |
| Memory Capacity | Up to 512 KB Battery-Backed SRAM for application programs/data |
| Programming Environment | CTI Workshop / CTI 2501 Programming Tools (C / Basic language support) |
| Diagnostic Indicators | Front Panel LEDs (Power, Module Status, Serial RX/TX activity) |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| Mounting / Form Factor | Single-Slot Base Format |
Product Introduction & Supply Chain Strategy
The CTI 2501 System Coprocessor is a high-performance processing card engineered for CTI 2500 Series and legacy Siemens Simatic 505 programmable automation systems. Designed to execute specialized mathematical algorithms, manage custom ASCII protocol handshakes, and perform background data archiving, the 2501 offloads processing overhead from the primary PLC CPU to maintain fast, deterministic loop scan times.
Sourcing this unit as New Surplus directly protects your facility from high Total Cost of Ownership (TCO) and long lead times associated with emergency control system retrofits. This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. Keeping 1–2 backup coprocessor modules in your on-site spare parts buffer shields legacy production lines against unexpected plant shutdowns.
2501
2501
Installation & Configuration Guide
1.Stage 1: Pre-Installation (Prep & Safety):Prerequisite & LOTO.
Isolate power to the PLC I/O rack by performing Lock-Out/Tag-Out (LOTO) on the base power supply. Put on a grounded ESD wrist strap before unboxing the replacement board. Record all DIP switch addresses, serial port jumper settings, and battery connections on the old 2501 card.
Verification: Confirm zero AC/DC voltage across the base power supply terminals using a calibrated digital multimeter.
2.Stage 2: Removal:2 min.
Unplug serial cable connectors from the front panel ports. Loosen the top and bottom retaining screws on the module, then pull the board straight out from the backplane guide slots using the top/bottom ejectors.
Verification: Inspect the backplane edge connector pins for physical alignment, dust, or thermal stress.
3.Stage 3: Installation (Clone & Seat):5 min.
Set the hardware configuration jumpers and DIP switches on the new CTI 2501 module to match the original unit identically. Slide the card firmly into the rack slot until the edge connector locks into the backplane, and tighten the top and bottom retaining screws.
Verification: Confirm the front panel retention screws are fully tightened to maintain ground frame integrity.
4.Stage 4: Power-On & Testing:Commissioning.
Re-apply rack power. Monitor the module diagnostic LEDs during boot-up initialization as the coprocessor loads memory and establishes communication handshakes with the main CPU.
Verification: Verify that the Module Status LED shines solid green and active serial port LEDs flicker during communication exchanges without triggering backplane error alarms.
Firmware/Software Versions & Upgrade Notes
- Recommended Programming Suite: CTI Workshop or CTI 2501 Coprocessor Development Toolset.
- Compatibility Constraints: Verify that the internal application program stored in non-volatile memory or battery-backed RAM is transferred to the replacement unit prior to putting the system back into service.
- Upgrade/Downgrade Warning: Replacing a coprocessor card without loading the specific user application code will cause the module to remain in an unconfigured state, halting all dependent serial communications and data logging functions. Always archive project files (.C25 or program dumps) before swapping hardware.
Frequently Asked Questions (FAQ)
Is this CTI 2501 module brand new or refurbished?
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. It ships in original anti-static packaging.
Why select New Surplus over refurbished coprocessor boards?
Refurbished PLC coprocessor boards frequently suffer from aged onboard backup battery circuits, degraded serial communication transceivers, and hidden thermal stress from years of continuous cabinet operation. A failure on a refurbished coprocessor can corrupt system memory or freeze serial communications without warning. Buying New Surplus ensures full factory lifespan and complete operational peace of mind.
How is the unit tested prior to shipment?
Every CTI 2501 module undergoes an inbound SOP quality check. This includes visual backplane contact inspection, anti-counterfeit serial verification, power-up diagnostic validation, and ESD-safe packaging protocols.
Can I install the CTI 2501 in a Siemens 505 rack?
Yes, CTI 2500 Series products, including the 2501 coprocessor, are form-fit-function replacements designed to operate seamlessly in both CTI 2500 bases and legacy Siemens Simatic 505 I/O racks.
What warranty coverage is included with this purchase?
We cover this New Surplus CTI 2501 module with a full 1-year replacement warranty, giving you rapid fulfillment and complete procurement confidence.
