AutomationDirect Leadshine DM805-AI Manuel de démarrage rapide - Page 15
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EM542S, EM556S
The EM542S and EM556S are digital stepper drives capable
of pulse and direction as well as CW and CCW operation,
with auto-motor config on power up and self-test capability.
These drives have a built-in current-limiting resistor (on
a switch) to allow either 5V or 24V input pulses. They also
include a fault and a brake output.
Specifications
Part Number
Output Current
Supply Voltage
Connector P1
Pin Function
Fault and Brake Output
Connector
Power Connector
Motor Connector
Connecting Devices to the EM542S, EM556S Drives
4-lead motors are the easiest to connect, and the speed – torque of the motor depends on winding
inductance. To determine the output current of the drive, multiply the nameplate motor phase current
by 1.4 to determine the peak output current. If the motor runs too hot then multiply by 1.2 instead. For
6-lead and 8-lead motor wiring information, please refer to the drive User Manual.
The drives are designed to operate within a specific voltage input (see specifications table). When
selecting a power supply, choose a power supply with an output range within the minimum and
maximum of the drive and be sure to leave room for power supply fluctuation and motor back-EMF.
The EM542S and EM556S drives can be connected for either sinking or sourcing signals, with optional
brake and fault outputs. Wire the connections to the motor, power supply, and controller according to
the diagrams on the next page:
Leadshine Stepper Drives Quick Start Guide – First Edition – 11/04/2019
Electrical, Connector, and Environmental Specifications
0�5–4�2 A peak
(0�4–3�0 RMS)
Pulse signal: 5V or 24V signal (Switch S3 determines voltage), differential input�
PUL+
High input is 4-5V or 22-24V, Low input is 0-0�5 V� Minimum pulse width = 2�5
μs.
Switch S3 factory default = 24V position�
WARNING! If switch S3 is in the 5V position and 24V is applied, the drive will be
PUL-
damaged�
DIR signal: 5V or 24V signal (Switch S3 determines voltage), differential input�
DIR+
High input is 4-5V or 22-24V, Low input is 0-0�5 V� Minimum pulse width = 2�5
μs.
Direction Function: requires 5μs setup time.
CW/CCW Function: see DIP switch SW14�
DIR-
WARNING! If switch S3 is in the 5V position and 24V is applied, the drive will be
damaged�
Enable signal: 5V or 24V signal (Switch S3 determines voltage), differential input�
ENA+
High input is 4-5V or 22-24V, Low input is 0-0�5 V� Minimum pulse width = 2�5
μs.
Enable Function: Close (pull low) to disable the drive�
ENA-
WARNING! If switch S3 is in the 5V position and 24V is applied, the drive will be
damaged�
ALM
Optional output connections� Maximum of 30V/100mA output, sinking or
sourcing�
The Brake output is active (current flowing) at all times except:
BR
a�
When power is off to the drive, or
b�
When the drive is disabled (EN input) and NOT using Shaft Lock (DIP
COM-
Switch SW15)
GND
Connect to power supply ground connection�
+VDC
Connect to power supply positive connection (24-48 VDC recommended)
A+,A-
Connect motor A+ wire to A+, and motor A- wire to A-.
B+,B-
Connect motor B+ wire to B+, and motor B- wire to B-.
Leadshine Stepper Drives Quick Start Guide
EM542S
20–50 VDC
(24–48 VDC typical)
EM556S
0�5–5�6 A peak
(0�4–4�0 RMS)
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