ProSoft PS69-DPS CompactLogix PROFIBUS DP Slave Module

The ProSoft PS69-DPS, also cataloged as the PS69-DPS PROFIBUS DPV1 Slave Network Interface Module, operates as a dedicated hardware component for PROFIBUS DP network integration within Allen-Bradley CompactLogix and MicroLogix 1500 controller platforms. Configured for single-slot 1769 backplane mounting, this module executes high-speed cyclic and acyclic data exchange between the Logix processor and a PROFIBUS DP master unit over an isolated RS-485 serial link.

Hardware Specifications

Backplane Bus Communication and Network Determinism

The PS69-DPS utilizes an onboard EC1-160P ASIC with integrated ASPC2 to execute deterministic PROFIBUS DP V0/V1 protocol processing independent of the host CPU cycle. Backplane bus communication velocity allows rapid I/O data mapping between the 1769 backplane buffer and the 408-byte PROFIBUS input/output data array. Firmware flash compatibility ensures seamless parameterization via standard GSD files within RSLogix 5000 / Studio 5000 environments, preventing protocol latencies and maintaining tight scan-time synchronization with the CompactLogix controller.

Frequently Asked Questions

Q: What is the backplane power constraint for installing the PS69-DPS module?

A: The PS69-DPS draws a maximum of 260 mA at 5 VDC directly from the 1769 CompactLogix backplane. It features a power supply distance rating of 6, meaning it must be installed within 6 module slots of a 1769 expansion power supply.

Q: How is diagnostic monitoring conducted on the PROFIBUS slave connection?

A: Diagnostic access is provided via an isolated RS-232 PS/2 mini-DIN port operating at 9600 baud. Real-time status, configuration transfers, and slave node state reporting can be monitored directly through this dedicated interface without disrupting the primary RS-485 PROFIBUS communication traffic.

Q: What profile limits govern the maximum dataset size for PROFIBUS DP V1 acyclic transfer on this hardware?

A: The module supports up to 408 Bytes of input data and 408 Bytes of output data transferred continuously across the backplane buffer, maintaining strict compliance with DP V0 and DP V1 slave cyclic/acyclic payload definitions.

Field Installation Guidelines

1. Ensure panel power supply is deactivated before inserting or removing the module from the 1769 CompactLogix assembly. Hot-swapping on 1769 backplanes is strictly prohibited to prevent backplane edge connector erosion or bus faulting.
2. Confirm the module is seated within the maximum 6-slot distance limit from the 1769 power supply to maintain steady-state 5 VDC power delivery across the backplane rail.
3. Terminate the RS-485 PROFIBUS cable using standard DB9 connectors with integrated termination resistors. The termination switches must be set to "ON" at both physical end-nodes of the RS-485 bus segment and "OFF" at intermediate nodes.
4. Route the PROFIBUS RS-485 signal cabling in dedicated, grounded metal conduits separated by a minimum of 200 mm from high-voltage AC power wiring and variable frequency drive output cables.
5. Connect the shield braid of the PROFIBUS cable directly to functional earth (FE) using low-impedance grounding clamps near the module entrance to suppress common-mode high-frequency electromagnetic noise.