Product Core Brief
- Model: CM572-DP (Order Code 1SAP170200R0001)
- Brand: ABB
- Series: CM572 Fieldbus Expansion Modules for AC500 PLC Platform
- Core Function: Operates as a galvanically isolated PROFIBUS DP master to link AC500 CPUs to distributed DP slave I/O and drives.
- Product Type: Slide-in PLC expansion communication module for TB511/TB521 DIN rail bases
- Key Specs: DP-V0/DP-V1 master | Isolated RS485 D-SUB9 | 9.6 kbps–12 Mbps baud range | Condition: New Original (New Surplus)
Product Introduction
ABB expands AC500 PLC CPUs with native PROFIBUS DP master capability for machine and discrete manufacturing layouts. It draws power entirely from the PLC backplane with no external wiring required for operation.This unit differs from CM577 Ethernet modules by exclusive DP bus hardware; its slim 28 mm width fits two expansion cards in a single standard rack slot, cutting cabinet footprint by 30 % versus wider third-party DP masters.
Key Technical Specifications
| Parameter | Value |
|---|---|
| OEM Order Number | 1SAP170200R0001 |
| Backplane Power Input | 24 V DC (-15 % / +20 %), reverse polarity protected |
| Max Power Draw | 2.1 W full bus load |
| PROFIBUS Physical Layer | Isolated RS485, 9-pin D-SUB female connector |
| Supported Protocols | PROFIBUS DP-V0 cyclic I/O, DP-V1 acyclic device diagnostics |
| Configurable Baud Rates | 9.6 kbps, 19.2 kbps, 93.75 kbps, 187.5 kbps, 500 kbps, 1.5 Mbps, 3 Mbps, 6 Mbps, 12 Mbps |
| Max Slave Nodes Per Module | 124 DP slaves (with repeaters) |
| Galvanic Isolation | Potential-free DP bus interface, 500 V DC separation |
| Mechanical Dimensions | W28 mm × H135 mm × D62 mm |
| Unit Net Weight | 0.12 kg |
| Operating Ambient Temp | 0 °C to +60 °C continuous operation |
| Storage Temperature Range | -40 °C to +70 °C, 5–95 % RH non-condensing |
| Enclosure Rating | IP20 for DIN rail cabinet mounting |
| Compatible CPU Series | PM581, PM582, PM590, PM591 |
| Matching Base Units | TB511, TB521 standard DIN rail terminal bases |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial numbers and 1SAP170200R0001 part code against ABB spare databases; inspect D-SUB9 pin straightness and plastic housing for cracks. Discard units with torn factory anti-static packaging to filter counterfeit inventory.
- Live Functional Test: Mount the module on TB511 base paired with PM591 CPU and PROFIBUS slave simulator. Run continuous 24-hour cyclic I/O exchange, log backplane voltage every 15 minutes, and simulate trunk cable disconnection to validate slave fault flag reporting.
- Electrical Parameter Test: Use a 500 V Megger to measure isolation resistance between DP bus circuits and PLC backplane logic; pass threshold set at 10 MΩ minimum. Verify reverse-polarity protection response with a Fluke 115 multimeter.
- Firmware Verification: Read and record factory communication firmware revision via Automation Builder software. Capture photos of D-SUB9 pin labeling and base locking tabs for field commission reference.
- Final QC & Packaging: Fit plastic dust cap over the D-SUB9 port. Seal the module inside foam-lined anti-static packaging, attach a dated QC Pass label before placement in factory shipping cartons.
Replacement Pitfall Guide
❗Firmware Mismatch: CPU firmware older than v2.3 lacks DP-V1 diagnostic register mapping. Installing the module on outdated firmware blocks access to drive parameter data and triggers constant PROFIBUS FAULT alarms. Flash matching CPU firmware before rack insertion.❗DIP Switch / Jumper Misconfiguration: Internal bus termination resistor defaults disabled for mid-trunk nodes. Enable the on-board resistor only for the final slave on the DP segment; dual termination creates signal reflection and random slave dropouts during production runs.❗Terminal / Cable Incompatibility: Unshielded DP cabling picks up EMI near servo drive stacks. Only use ABB-approved shielded twisted-pair DP cable with single-point shield grounding at the D-SUB connector.❗Power Supply Mismatch: Calculate full backplane load with a minimum 20 % power headroom. Stacking three of the unit plus analog I/O modules overloads aged TB511 base power traces, triggering random PLC warm resets.❗ESD Damage: Low-humidity machine shop floors generate static charge that burns the RS485 transceiver chip instantly. Lay an anti-static mat under the DIN rail, wear a grounded wrist strap, and touch bare cabinet chassis ground for three seconds before handling the module PCB side.Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- -XC → : Direct — identical electrical and firmware behavior, extended environmental XC variant only differs in coating
- CM577-ETH → : Incompatible — Ethernet-based module with no PROFIBUS DP hardware or protocol stack
- CI854BK01 → : Incompatible — AC800M CEX bus master, no physical fit to backplane
- Third-party DP slave I/O → : Direct — standard DP-V0/V1 GSD file import via Automation Builder with zero hardware edits
Benchmarks
- Bus scan cycle: 4 ms (simulated load, 32 DP slave I/O stations at 1.5 Mbps)
- Comms throughput: 12 Mbps (PROFIBUS DP RS485 maximum baud rate)
- Fault detection latency: < 2 ms (DP trunk break diagnostic flag to Automation Builder HMI)
