Description
Delta Tau ACC-36E | 16-Channel 12-Bit A/D Converter Board
Dynamic Product Introduction
Advanced motion control and automated test cells frequently require real-time processing of analog telemetry alongside high-speed axis commands. The Delta Tau ACC-36E bridges this requirement within UMAC rack architectures, supplying 16 channels of precise 12-bit A/D conversion.
Whether monitoring hydraulic pressure loops, reading analog position feedback devices, or logging general-purpose process variables, this board interfaces directly through the backplane expansion bus to feed data straight into the Turbo PMAC or Power PMAC CPU. Maintaining legacy Delta Tau test stands relies on ensuring your address jumpers and channel scanning registers match your application software configuration.
ACC-36E
Key Technical Specifications
| Parameter | Specification Detail |
| Primary Architecture | Multiplexed successive approximation A/D converter core |
| System Compatibility | UMAC Turbo, Turbo PMAC, and Power PMAC Systems |
| Input Channels | 16 single-ended or 8 differential analog input channels |
| Resolution | 12-Bit digital conversion |
| Input Voltage Range | \pm10V standard (configurable options for unipolar/bipolar ranges) |
| Field Termination | Standard DB15 connectors / terminal breakout blocks |
| Form Factor & Mounting | 3U industrial rack-mount module (plugs into backplane expansion port) |
Global Sourcing & Live-Test SOP
Sourcing legacy data acquisition boards requires meticulous inspection of analog multiplexer ICs and input protection circuitry to ensure measurement linearity:
- Inbound Verification: Board part numbers, layout revisions, and backplane connector pins are audited against authentic Delta Tau build documentation.
- Live Rack Simulation: The card is mounted onto a verified UMAC test backplane, confirming proper communication registration and address mapping across the internal bus.
- Diagnostics: Using a precision multi-channel voltage simulator, we inject known DC voltages (\pm10V range) across single-ended and differential inputs. We verify that internal conversion registers log correct digital values without drift, channel crosstalk, or missing codes.
- Final Prep: Approved units are cleaned, fitted with protective connector covers, and sealed in heavy-duty anti-static moisture-barrier packaging.
The Field Engineer’s Pitfall Guide
❗ Base Address Jumper Conflicts: The ACC-36E relies on physical switch or jumper settings to define its base memory address on the expansion backplane. Installing a replacement board without matching the original address offsets will cause communication blindness, preventing the PMAC CPU from reading the channel data.
❗ Unshielded Analog Cabling: Low-level analog signals are highly susceptible to electromagnetic interference (EMI). Running unshielded sensor cables parallel to high-voltage motor power leads will inject noise into the conversion channels, resulting in unstable readings.
❗ Hot-Plug Disasters: Never insert or remove an ACC-36E module into a live, powered UMAC rack. Doing so risks sending voltage spikes down the backplane bus, which can damage sensitive multiplexer chips or corrupt the rack’s power distribution board.
Intent-Driven FAQ
Can the ACC-36E inputs be used for closed-loop motor feedback?
Yes. While often used for general-purpose data acquisition and sensor monitoring, the analog channels can be mapped into PMAC data structures to handle auxiliary analog feedback requirements.
How do I configure the board for single-ended vs. differential inputs?
Input configuration is typically managed via onboard hardware jumpers or switch settings combined with software channel mapping as outlined in the technical reference manual.
Do I need to modify my PMAC firmware or project code when replacing this board?
If you are replacing an exact, failed hardware match with identical base address switch settings, your existing configuration code will read the channels immediately upon boot.
What causes saturated or maxed-out A/D readings?
Saturated readings typically indicate an input voltage exceeding the \pm10V threshold, an open differential return path, or a damaged input protection amplifier on that specific channel.
What warranty is included with surplus units?
Every unit shipped from our stock is backed by a comprehensive 12-month operational warranty covering conversion linearity, channel integrity, and power regulation stability.
