Product Core Brief
- Model: DSDO120 57160001-AK
- Brand: ABB
- Series: S100 I/O / Advant OCS
- Core Function: 16-channel digital output module that drives relays, solenoids, indicators, and contactors from an ABB S100 I/O station.
- Product Type: Digital Output Module
- Key Specs: 16 channels | 24/48V DC output | Modulebus backplane interface
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction
Finding a clean, correctly labeled DSDO120 in the surplus market is harder than it should be. This ABB S100 I/O digital output module is a legacy part — discontinued, but still installed in countless Advant OCS and AC 450/460 systems that haven’t been migrated yet. It provides 16 discrete output channels at 24/48V DC, wired through a terminal block, and plugs directly into the S100 I/O rack via Modulebus.
What makes it worth keeping on the shelf: one failed output channel can freeze a solenoid valve or drop an alarm relay. Having a verified spare on hand means you swap the card during the next planned window instead of chasing a ghost fault at 2 AM. For plants still running S100 I/O, this isn’t a “nice to have.” It’s insurance.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | DSDO120 / 57160001-AK |
| Product Type | Digital Output Module |
| I/O Series | ABB S100 I/O |
| Compatible Systems | Advant OCS, AC 450/460, S100 I/O stations |
| Number of Channels | 16 digital outputs |
| Output Voltage | 24/48V DC |
| Backplane Interface | Modulebus |
| Connector Type | 16-channel terminal block |
| Mounting | DIN-rail / S100 I/O rack |
| Operating Temperature | -20°C to +70°C |
| Protection | IP20 (panel-mounted) |
Note: Per-channel current ratings and isolation specs should be confirmed against the original ABB hardware manual for your specific revision.
Key Selling Points & Differentiators
- Correct part, correct series. This is an S100 I/O digital output module — not an AC800M DO801, not a DSDO115A, and not a relay-output DSDO131.
- 16 channels at 24/48V DC. Covers the most common solenoid, relay, and indicator loads in legacy ABB installations.
- Modulebus backplane. Drops directly into existing S100 I/O racks — no rewiring the station.
- New surplus, factory sealed. No refurbishment guesswork. You receive an unused unit with original labeling intact.
- Not recommended for AC800M / 800xA S800 I/O stations. That platform uses DO801/DO810/DO820 series cards, not S100 modules.
- 12-month warranty with pre-shipment visual and power-up verification.
Quality Transparency SOP
- Label & part-number audit. Verify “DSDO120” and “57160001-AK” on the nameplate. Cross-check against known ABB S100 labeling formats to rule out relabeled substitutes.
- Visual PCB & connector inspection. Check for corrosion, burnt traces, or rework. Inspect the terminal block for cracked housing or bent pins — common failure points on pulled units.
- Backplane pin check. Verify Modulebus connector pins are straight and undamaged. Bent pins cause intermittent communication faults that look like software errors.
- Power-up & channel test. Apply rated supply voltage. Verify module status LEDs. Use a multimeter to confirm output switching on individual channels under load.
- ESD packaging. Each unit sealed in anti-static bag, boxed with foam, shipped with a signed test report.
Technical Risk Avoidance
- ❗ Do not mix S100 and S800 I/O. DSDO120 belongs to the S100 I/O family. It will not fit or function in an S800 I/O station used with AC800M controllers.
- ❗ Confirm output voltage before wiring. This module operates at 24/48V DC. Connecting it to a 110V AC or 220V AC load circuit will destroy the outputs instantly. If you need relay outputs, look at DSDO131 instead.
- ❗ Document channel assignments before swapping. S100 stations don’t auto-configure like modern I/O. Wrong slot placement or missing address settings can cause silent output failures.
- ❗ Check per-channel current draw. Driving too many solenoids from a single card exceeds the internal bus current budget. Spread high-draw loads across multiple modules.
Buyer’s FAQ
Q: Is this compatible with AC800M / 800xA systems? A: No. The DSDO120 is an S100 I/O module for Advant OCS and AC 450/460 platforms. AC800M systems use S800 I/O (DO801, DO810, DO820, etc.).
Q: Is this new or refurbished? A: New original surplus — factory sealed, never installed. We do not sell refurbished or pulled units as “new.”
Q: Can I substitute DSDO115A or DSDO131? A: Not directly. DSDO115A is a 32-channel 24V DC transistor output for S800 I/O. DSDO131 is a relay-output module. Different series, different electrical characteristics. Stick with DSDO120 for a like-for-like replacement.
Q: What’s the lead time? A: In-stock units ship within 1–2 business days. If you need a specific date code or quantity, let us know before ordering.
Q: What’s the warranty? A: 12 months from ship date. Covers manufacturing defects and DOA failures. Does not cover damage from incorrect wiring or overvoltage.
