GMA-D Series DeviceNet Interface Bus-Based Multi-turn Absolute Encoder

short description:

GMA-D Series encoder is a DeviceNET interface cooper-gear-type mult-turn absolute encoder with housing Dia.:58mm; Solid Shaft Dia.:10mm, resolution: Max.29bits; This protocol is mainly used by Allan Bradley / Rockwell. DeviceNet uses the same physical layer as CAN, combined with CIP. The Communications and Information Protocol (CIP) is a communications protocol for transferring automation data between devices. Communication is also done by message telegrams (11 bits of identifier and 8 subsequent bytes).

Housing Dia.:58mm

Hollow/Solid Shaft Dia.:10mm

Resolution:Max.16bits, Single turn max.16bits, Total Max.29bits

Supply Voltage:5v,8-29v

Interface:DeviceNet

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Product Detail

1. Product Overview

Parameter	Details
Product Name	GMA-D Series DeviceNet Interface Bus-Based Multi-turn Absolute Encoder
Product Type	GERTECH Multi-turn Absolute Encoder (Cooperative Gear Type)
Interface/Output	DeviceNet (based on the CAN physical layer, combined with the CIP protocol)
Supported Protocols	DeviceNet (mainly used by Allen Bradley/Rockwell); also supports CANopen and DeviceNet protocols
Communication Format	Message telegrams: 11-bit identifier + 8 bytes of data
Certifications	CE, ROHS, KC, ISO9001
Delivery Lead Time	Within one week after full payment; shipment method as discussed (e.g., DHL)

2. Mechanical and Electrical Parameters

Parameter	Specification
Housing Diameter	58 mm
Shaft Type & Diameter	Solid Shaft, 10 mm
Resolution	- Title Description: Up to 29 bits total resolution - Additional Note: Multi-turn up to 12 bits, single-turn up to 13 bits - Detailed Parameters: Multi-turn up to 16 bits, single-turn up to 16 bits (total 29 bits, subject to specific model)
Supply Voltage	Mainly 8–29 V (some descriptions mention 5 V; please confirm with the specific model)
Maximum Frequency Response	30 kHz

3. Mechanical Data

Parameter	Specification
Start Torque	0.01 N·m
Maximum Axial Load	5 – 30 N
Maximum Radial Load	10 – 20 N
Maximum Rotational Speed	6000 rpm
Weight	160 – 200 g

4. Environmental Parameters

Parameter	Specification
Operating Temperature	-30 ~ 80 °C
Storage Temperature	-40 ~ 80 °C
Protection Rating	IP65

5. Communication and Bus Technology Details

Parameter	Description
Communication Interface	DeviceNet (based on the CAN physical layer)
Underlying Protocol	Uses CIP (Communications and Information Protocol)
Message Format	Telegram format: 11-bit identifier + 8 bytes of data
Bus Access Method	Uses the CSMA/CA principle (Carrier Sense Multiple Access with Collision Avoidance): All nodes listen to check if the bus is free. If multiple nodes send simultaneously, the node with the lowest identifier (highest priority) transmits first while others wait for the bus to clear.
Telegram Types Explanation	- The message type number is set by digital coding (via turn switches on the encoder) - PDOs (Process Data Objects): Used for real-time data exchange with high priority - SDOs (Service Data Objects): Used for configuration transmissions (e.g., device parameter settings) with lower transmission frequency

6. Selection and Ordering Guidelines

Step	Description
Step 1	If you have previously used other brand encoders, please provide the brand and model information. Our engineers will recommend a high-performance, cost-effective equivalent replacement.
Step 2	Choose the encoder type: incremental encoder, absolute encoder, draw-wire sensor, or manual pulse generator.
Step 3	Depending on your application, select the output format (for incremental encoders, options include NPN/PNP/line driver/PUSH PULL) or the interface (e.g., Parallel, SSI, BISS, Modbus, CANopen, Profibus, DeviceNet, Profinet, EtherCAT, Power Link, Modbus TCP).
Step 4	Determine the required resolution: GERTECH incremental encoders up to 50,000 ppr and GERTECH absolute encoders up to 29 bits.
Step 5	Choose the housing diameter and shaft diameter based on your application requirements.

7. Equivalent Replacement Models (GERTECH Equivalents)

Brand	Equivalent Models (Examples)
Omron	E6A2 Series: E6A2-CS3C, E6A2-CS3E, E6A2-CS5C, E6A2-CW3C, E6A2-CW3E, E6A2-CW5C, E6A2-CWZ3C, E6A2-CWZ3E, E6A2-CWZ5C E6B2 Series: E6B2-CS3C, E6B2-CS3E, E6B2-CS5C, E6B2-CW3C, E6B2-CW3E, E6B2-CW5C, E6B2-CWZ3C, E6B2-CWZ3E, E6B2-CBZ5C E6C2 Series: E6C2-CS3C, E6C2-CS3E, E6C2-CS5C, E6C2-CW3C, E6C2-CW3E, E6C2-CW5C, E6C2-CWZ3C, E6C2-CWZ3E, E6C2-CBZ5C
Koyo	TRD-MX, TRD-2E/1EH, TRD-2T, TRD-2TH, TRD-S, TRD-SH, TRD-N, TRD-NH, TRD-J, TRD-GK, TRD-CH series
Autonics	E30S, E40S, E40H, E50S, E50H, E60S, E60H series

8. Packaging Information

Item	Details
Packaging	Standard export packaging (or customized as per buyer requirements)

9. FAQ Summary

Question No.	Question	Summary Answer
1	How do I select the right encoder?	Determine whether you need an incremental or absolute encoder before consulting our technical support.
2	What parameters need to be provided before ordering?	Please provide the encoder type (solid or hollow shaft), housing diameter (25–100 mm), shaft diameter (4–45 mm), number of phases and resolution (20 ppr–65,536 ppr), output mode (e.g., NPN, PNP, Push-pull, line driver), and supply voltage (DC5V–30V).
3	How can I choose the right encoder on my own?	Verify the product specifications and installation dimensions, then contact the supplier for further details.
4	What is the minimum order quantity (MOQ)?	The minimum order quantity is 20 pieces; lower quantities may incur higher freight charges.
5	Why choose GERTECH brand encoders?	Since 2004, our in-house engineering team has designed and developed these encoders using mainly imported components. We operate in an anti-static, dust-free workshop and are ISO9001 certified, always upholding a commitment to quality.
6	What is the delivery lead time?	Sample lead time is approximately 3 days, with mass production taking 7–10 days.
7	What is your warranty and after-sales policy?	We offer a 1-year warranty and lifetime technical support.
8	What are the benefits of becoming an agent?	Enjoy special pricing, market protection, and comprehensive technical support.
9	How can I become a GERTECH agent?	Please send us an inquiry, and we will contact you as soon as possible.
10	What is your production capacity?	Currently, we produce approximately 5,000 units per week and are building a second-phase production line to meet higher demand.

Supplementary Information

About GERTECH Encoders

GERTECH rotary encoders support both CANopen and DeviceNet communication protocols.
The message type is set using digital coding (via turn switches on the encoder) to differentiate between real-time data exchange (PDOs) and configuration transmissions (SDOs).

About the CAN Bus and Communication Mechanism

Introduction to CAN: Developed by Bosch, the CAN protocol is now widely used in industrial automation, operating as a multi-master system.
Bus Access Method: Using the CSMA/CA mechanism, all nodes monitor the bus status. When the bus is free, a node may transmit; if multiple nodes transmit simultaneously, the one with the lowest identifier (highest priority) wins, while the others wait and retry.