ETEL DSB2P Series Servo Amplifier Connection and Configuration Guide

Complete Guide to On site Hardware Deployment and Wiring of ETEL DSB2P Series Digital Servo Amplifier

In precision motion control systems, the servo amplifier (driver) serves as the power interface connecting the controller and motor, and its hardware installation and wiring quality directly determine the stability and reliability of the system. The ETEL DSB2P series digital servo amplifier is designed for direct drive applications and supports single-phase, two-phase, and three-phase brushless/DC/stepper motors. It covers various physical forms such as rack mounted (6U 19 inch standard) and standalone with a chassis, with output currents ranging from 4.9A to 56A peak. However, from model selection and chassis heat dissipation planning to encoder wiring and EMC shielding grounding, negligence in hardware deployment details often leads to system malfunction or even equipment damage. This article is based on the core content of the DSB2P series hardware manual (version D), and systematically outlines the key points of on-site hardware installation and wiring to help engineers avoid common pitfalls.

Model selection and physical form

The DSB2P series offers four physical forms to adapt to different installation environments:

1.1 Rack Module (model suffix 1)

Width of 10F (approximately 50.8mm), height of 6U, suitable for standard 19 inch rack.

An external DC power supply (24-340VDC) is required, with a peak current of 11A or 21A (depending on the sub model X21/X31).

No built-in cooling fan, relying on forced air cooling from the cabinet.

1.2 Rack Module with Heat Sink (suffix 2)

Width of 14F (approximately 71.1mm), suitable for higher power requirements.

The peak current can reach 21A, 42 A, and even 56 A (sub models X32/X42/X52).

The heat sink area is larger, but it still requires coordination with the cabinet air duct.

1.3 Housed without PSU (suffix 3)

The independent box has a size of 65.2 × 168.7 × 318mm and can be wall mounted or installed inside a cabinet.

An external DC power supply (24-340VDC) is required, with a peak current of 11A or 21A.

1.4 Integrated power module with chassis (Housed with PSU, suffix 4)

The size of the independent box is 96 × 222 × 306mm, and it is directly connected to 85-240Vac AC mains power.

Built in power rectifier and fan, with peak current ranging from 11A to 56A.

Optional phase to phase short-circuit relay (suffix includes 2) and external regenerative resistor interface.

Selection points: If there is already a DC power supply on site and space allows, the rack module (suffix 1/2) has the highest cost-effectiveness; If you need to place or move it independently, it is more convenient to have a chassis module (suffix 3/4). High power applications (>21A) must choose suffix 2 or 4 and pay attention to the cooling air volume of the cabinet.

Mechanical installation and heat dissipation requirements

2.1 Key points for installing rack modules

The rack module is vertically inserted into a 19 inch sub rack through upper and lower rails, with a depth of 239.24mm.

Multiple drives can be centrally powered by the ETEL DSO-PWR power module, and one DSO-PWR can supply up to 7 DSB2P rack modules (depending on power allocation).

Be sure to use metal screws to secure the module to the rack rails during installation, ensuring good grounding.

2.2 Heat dissipation distance

It is recommended to maintain a tight fit of 0mm between modules (the manual recommends B=0mm), but at least 100mm (A=100mm) airflow channels should be left at the top and bottom of the cabinet.

The rack module itself does not have a fan and must rely on the axial flow fan installed inside the cabinet to provide forced air cooling. The air volume needs to be calculated based on the total power consumption - taking DSB2P-PX52 as an example, the power consumption at full load can reach several hundred watts. It is recommended that the air volume of the cabinet should not be less than 100CFM.

The integrated power module (suffix 4) has a built-in fan, but the air inlet and outlet must not be blocked, and a 100mm space needs to be reserved around it.

2.3 Environmental Protection

The drive must be installed in a closed cabinet to prevent liquid splashing, dust, and smoke from entering.

The ambient temperature should be controlled between 0-40 ℃, and the humidity should be less than 85% non condensing.

Detailed explanation of encoder interface wiring

The encoder signal is a critical feedback link for servo control, and the quality of wiring directly affects position accuracy and system stability.

3.1 TTL encoder (J10, 15 pin D-Sub female socket)

The TTL encoder outputs two orthogonal square wave signals (A+, A -, B+, B -) and one zero position pulse (Z+, Z -), which comply with the RS422 differential standard. Pin definition:

1: +5V output (protected by F7 500mA fuse)

2: UA2- (TTL signal 2 negative terminal, direction signal in pulse/direction mode)

3: UA1- (TTL signal 1 negative terminal, pulse signal in pulse/direction mode)

4: UA0- (TTL zero signal negative terminal)

9：GND

10：UA2+

11：UA1+

12：UA0+

Special note: If using a non differential TTL encoder (with only A, B, Z single ended signals), an external resistor needs to be added to the DSB2P input terminal. Section 3.1.1.2 of the manual provides the specific connection method - pulling down UA0-, UA1-, UA2- through resistors to GND to achieve single ended to differential conversion.