Hyosung S21685202 ATM CDU Detecting Light Sensor for MX5600 MX2900
Place of Origin:China
Model Number:
Hyosung S21685202 CDU optical sensor receiver. NEW Original / REBUILT / Refurbished.
Supplier: Guangzhou MicroLinkpro Technology Co.,Ltd
Telephone: (+852-93572135) , Max Liu
Email: linda.zhou@microlinkpro.com
Address:201,A12 Building, Dongjin Logistics Park No. 39 Chenjialin Road, Nan'an 511340 Xintang Zengcheng District Guangzhou City, G.D, P.R.China
What This Part Does
The S21685202 is the detecting light sensor inside the Hyosung CDU (Cash Dispensing Unit). It covers sensor positions CS1, CS2, CS4, and CS13 — a critical set of optical gates that track every note moving through the dispenser. When a bill passes between the sensor pair, the receiver (S21685201) detects the light beam break and tells the controller the note's position, timing, and passage status.
This sensor is the dispenser's eyes. If it's covered in dust, misaligned, or failing intermittently, the CDU loses track of notes mid-path. The ATM logs "sensor error" or "note position error" and the dispenser goes out of service. Since the sensor pair works together, many engineers replace both S21685202 (detecting) and S21685201 (emitting) at the same time to avoid chasing intermittent faults.
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Technical Specs
| Parameter | Detail |
|---|---|
| **Part Number** | S21685202 (also listed as 21685202) |
| **Function** | CDU Detecting Light Sensor |
| **Sensor Positions** | CS1, CS2, CS4, CS13 |
| **Sensor Type** | Optical gate / photodetector (detecting side) |
| **Paired Sensor** | S21685201 (emitting side) |
| **Compatible Dispenser** | CDU (Cash Dispensing Unit) |
| **Compatible ATM Series** | MX2600, MX2900, MX4000, MX5000, MX5100, MX5200, MX5300, MX5600, MX7000, MX7100, MX7600, NH1500, NH1800, NH2700, HALO series |
| **Material** | Industrial-grade photoelectric component, sealed housing |
| **Certification** | CE |
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Compatible Models
Full compatibility list based on Hyosung CDU shared-platform design:
**Hyosung MX5600T / MX5600S / MX5600TA** — Through-the-wall and lobby models
**Hyosung MX2900** — Compact lobby dispenser
**Hyosung MX2600** — Entry-level lobby ATM
**Hyosung MX5000CE / MX5200T / MX5200SE / MX5300CE / MX5300XP** — Multi-function series
**Hyosung MX7000T / MX7100T / MX7600T / MX7600I / MX7600DR / MX7600FFL** — High-capacity series
**Hyosung NH1500 / NH1800CE / NH1800SE** — NH series lobby ATMs
**Hyosung NH2700T / NH2700CE** — NH through-the-wall series
**Hyosung HALO / HALO O / HALO S** — Drive-up and walk-up models
**Hyosung MX4000W / MX5100T / MM5050** — Other CDU-equipped models
If your machine uses a Hyosung CDU dispenser module, this sensor fits. Contact us with your ATM model to double-check compatibility.
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Signs You Need a Replacement
ATM reports "sensor error", "CDU sensor fault", or "note position error" repeatedly
Intermittent note jams that clear on retry (dust on sensor lens)
CDU fails to detect notes after a successful pick — notes pass but the controller doesn't register them
Error codes related to CS1, CS2, CS4, or CS13 positions in service logs
Frequent "note not delivered" or "note stuck in transport" errors
Sensor lens is visibly dusty, scratched, or cloudy (sensor aging)
You've already replaced the emitting sensor (S21685201) but faults persist — the detecting side may be the real culprit
Optical sensors degrade slowly. What starts as one jam per week becomes one jam per hour. If you're seeing increasing CDU sensor faults, don't wait — replace the sensor pair.
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Why Buy From MicroLinkpro
**OEM-grade quality** — Every sensor is tested on a live CDU unit before shipping. No dead-on-arrival parts.
**Real stock** — Both brand-new and refurbished sensors ready to ship. No fake lead times.
**Sensor pair pricing** — Buy S21685202 + S21685201 together and save. Most engineers replace both at once.
**B2B pricing** — We supply ATM service companies and fleet operators. Volume discounts available.
**Technical support** — Our team has 23 years of ATM engineering experience. Need help identifying which sensor position is failing? We know these machines.
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Ordering Info
| Option | Condition | Warranty |
|---|---|---|
| S21685202-NEW | NEW (Original) — Genuine Hyosung, factory stock | 12 months |
| S21685202-REBUILT | REBUILT (Made in China) — In-house manufacturing for EOL停产件 | 12 months |
| S21685202-REF | Refurbished — Tested, cleaned, budget option | 6 months |
Minimum order: 1 unit
Bulk pricing: 5+ / 10+ / 50+ tier discounts
Shipping: DHL / FedEx / UPS worldwide, typical dispatch within 48 hours
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Frequently Bought Together
| PN | Description | Why |
|---|---|---|
| S21685201 | CDU Reception / Emitting Sensor | Sensor pair — replace both to avoid chasing intermittent faults |
| 7430000224 | Note Separator | If sensors are failing, the separator feed path may need service too |
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Related Parts We Stock
| PN | Description |
|---|---|
| S21685202 | CDU Detecting Light Sensor (this part) |
| S21685201 | CDU Reception / Emitting Light Sensor |
| 7430000224 | Note Separator |
| 7430000208 | Cash Cassette CDU10 |
| 7430000301 | CDU10 Transport / Throat |
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Shipping & Warranty
**Lead Time**: 1–3 business days (in stock)
**Shipping**: DHL / FedEx / UPS worldwide
**Warranty**: 90 days against manufacturing defects
**Bulk Orders**: Discount available for 5+ units
Request a Quote
📧 **linda.zhou@microlinkpro.com**
📱 WhatsApp: +852-93572135
*Include part number and quantity. We respond within 12 hours.*
*Technical team with 23 years of ATM engineering expertise.*
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