G2803 Series — 28mm Servo Flange Incremental Encoder with A/B/Z Output

Compact 28mm micro servo flange incremental encoder with internal photoelectric data reading and ultra-parallel light components for direct code disc signal reading. Built-in servo flange for easy motor mounting. EPOCH is a trusted industrial encoder supplier providing sourcing solutions for servo motor feedback applications.

Lead Time: 7-Day Dispatch | Price: Contact for Quote

IP54 Protection Waterproof, Oil-proof, Dustproof

28mm Servo Flange Built-in flange for easy mounting

ASIC Phase Array Chip Ultra-parallel optical components

Compact Size Lightweight micro encoder design

Wide Voltage Supply 5V±0.25V or 5~30V compatible

28 Pulse Options 50 to 3600 p/r customizable

6 Output Methods NPN, PNP, Voltage, Complementary, 26LS31, 7272

G2803 28mm Servo Flange Encoder — Technical Specifications & Parameters

Supply Voltage (VCC)	DC 5V±0.25V or 5~30V
Output Voltage	High Level ≥3.4V, Low Level ≤0.4V
Current Consumption	≤160mA
Resolution (Pulses per Revolution)	50 ~ 3600 p/r
Response Frequency	0~80 kHz
Output Waveform	Square Wave, Duty Cycle 0.5T±0.1T
Starting Torque (+25°C)	1.5×10⁻³ N·m
Moment of Inertia	3.5×10⁻⁶ kg·m²
Max Shaft Load	Radial: 15N, Axial: 10N
Max Mechanical Rotation Speed	6000 r/min
Vibration Resistance	49m/s², 10~200Hz, 2h per XYZ axis
Shock Resistance	980m/s², 6ms, 3 times per XYZ axis
Protection	Waterproof, Oil-proof, Dustproof (IP54)
Operating Temperature	-20°C ~ +80°C
Storage Temperature	-30°C ~ +85°C
Operating Humidity	30~85% (No Condensation)
Operating Life	MTBF ≥50000h (+25°C, 2000rpm)
Weight (excluding cable)	Approx. 0.1 kg

G2803 28mm Encoder — Mechanical Dimension Drawing & Installation Guide

Below is the dimensional drawing representing the physical boundaries of the EPOCH G2803 28mm Servo Flange Encoder. Installation checks are highly recommended on the motor end shaft to confirm mechanical fit alignment.

G2803 28mm Encoder — Mechanical Dimension Drawing & Installation Guide

G2803 Incremental Encoder — Cable & Wiring Connection Definition

Signal	Wire Color	7-Pin	9-Pin (Driver)
+V	Red	1	1
0V	Black	4	4
A	Green	3	5
A/	Brown	-	7
B	White	5	3
B/	Gray	-	6
Z	Yellow	2	2
Z/	Orange	-	8
Shield	Shield	6	9

G2803 Model Code Definition & Ordering Information — Part Number Configuration

Use the following format to specify your precise encoder configuration:

G2803 — [Pulses] — Z — [Output Method] — [Voltage] — [Cable Outlet] — [Cable Length]

Example: G2803 — 1024 — Z — L — 5 — G — 1 specifies a G2803 encoder with 1024 P/R, 3-phase (A/B/Z), 26LS31 differential output, 5V supply, rubber side outlet, 1-meter cable.

G2803 Ordering Code Options

Field	Code	Description
Output Method	C, CP, T, F, L, K	C — Open-collector NPN
		CP — Open-collector PNP
		T — Voltage Output
		F — Complementary Output
		L — 26LS31 Differential Output
		K — 7272 Wide Voltage Output
Number of Pulses (CPR)	50–3600	50, 100, 120, 125, 150, 180, 200, 250, 256, 300, 360, 400, 500, 512, 600, 720, 800, 900, 1000, 1024, 1200, 1800, 2000, 2048, 2400, 2500, 3000, 3600 P/R. Other resolutions available on request.
Number of Phases	Z	3-phase output: A, B, Z with complementary signals.
Power Supply Voltage	5, 24, H, L	5 — 5V DC
		24 — 5~24V DC
		H — 5~24V Input, 5V Output
		L — 5V Input, 5~24V Output
Cable Outlet Method	D, G, H, F	D — Metal Side Outlet
		G — Rubber Side Outlet
		H — Socket Side Outlet
		F — Rubber Rear Outlet
Cable Length	0.17, 1, 2	0.17 — 0.17 meters \| 1 — 1 meter \| 2 — 2 meters

G2803 Servo Flange Encoder — Typical Applications & Use Cases

AC & DC servo motor feedback systems requiring 28mm encoder mounting
CNC machine tool spindle positioning with high-speed feedback
Robotic joint angle measurement with IP54 industrial protection
Automated production line motion control requiring wide voltage compatibility
Packaging and printing machinery needing reliable wide temperature operation
Textile equipment speed regulation with ASIC phase array signal processing

G2803 28mm Servo Flange Encoder — Frequently Asked Questions

Q: What pulse per revolution options does the G2803 28mm servo flange encoder offer?

The G2803 28mm incremental encoder offers 28 pulse count options from 50 to 3600 P/R, including standard resolutions such as 100, 120, 125, 150, 180, 200, 250, 256, 300, 360, 400, 500, 512, 600, 720, 800, 900, 1000, 1024, 1200, 1800, 2000, 2048, 2400, 2500, 3000 and 3600 P/R. Custom CPR values can also be accommodated per customer request.

Q: What output interface options are available for the G2803 servo flange encoder?

The G2803 28mm servo flange encoder supports 6 output methods: open-collector NPN (C), open-collector PNP (CP), voltage output (T), complementary output (F), 26LS31 differential line driver RS422 compatible (L), and 7272 wide voltage output (K). The differential line driver output is recommended for long-distance industrial applications requiring noise immunity.

Q: What is the maximum speed and temperature range of the G2803 IP54 encoder?

The G2803 servo flange encoder features a maximum mechanical rotation speed of 6000 r/min with a response frequency up to 80 kHz. It operates reliably from -20°C to +80°C with storage from -30°C to +85°C. With MTBF exceeding 50,000 hours at +25°C, this compact 28mm encoder delivers long-term durability for continuous industrial servo motor feedback operation.

Q: How do I select the correct G2803 28mm encoder model for my servo motor?

G2803 model selection requires 7 parameters: product model (G2803), pulse count (50 to 3600 P/R), number of phases (Z for A/B/Z), output method (C/CP/T/F/L/K), power supply voltage (5V, 5-24V, H = 5-24V Input, 5V Output / L = 5V Input, 5-24V Output), cable outlet method (D/G/H/F), and cable length (0.17m, 1m or 2m standard). Contact us for configuration assistance.

Q: Where can I find the G2803 encoder datasheet and wiring diagram?

The G2803 mechanical dimension drawing and cable wiring definition are provided on this page. For complete technical documentation including the full G2803 servo flange encoder datasheet, please contact our team at liya@epoch-electronic.com.

Need help selecting the right G2803 servo flange encoder for your application?

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All specifications are subject to change without notice. Contact EPOCH for the latest technical documentation and ordering information.