.................................................. 2
Features ................................................................................................................... 2
Applications ............................................................................................................ 2
2. Specifications .............................................................................................................. 3
Electrical Specifications .......................................................................................... 3
Mechanical Specifications....................................................................................... 2
Operating Environment and Other Specifications................................................... 2
Elimination of Heat ................................................................................................. 2
3. Pin Assignment and Description ................................................................................. 3
Connector P1 Configurations .................................................................................. 3
Connector P2 Configurations .................................................................................. 3
4. Control Signal Connector (P1) Interface..................................................................... 4
5. Connecting the Motor.................................................................................................. 4
Connections to 4-lead Motors ................................................................................. 5
Connections to 6-lead Motors ................................................................................. 5
Half Coil Configurations ................................................................................. 5
Full Coil Configurations.................................................................................. 5
Connections to 8-lead Motors ................................................................................. 6
Series Connections .......................................................................................... 6
Parallel Connections........................................................................................ 6
6. Power supply Selection ............................................................................................... 7
Selecting Supply Voltage......................................................................................... 7
7. Selecting Microstep Resolution and Driver Output Current ....................................... 7
Microstep Resolution Selection............................................................................... 7
Current Settings....................................................................................................... 8
Dynamic Current Setting................................................................................. 8
Standstill Current............................................................................................. 9
Control Signal Mode Setting........................................................................... 9
8. Wiring Notes ............................................................................................................... 9


9. Typical Connection.................................................................................................... 10
10. Sequence Chart of Control Signals.......................................................................... 10
11. Protection Functions.................................................................................................11
Over-voltage Protection .........................................................................................11
Short Circuit Protection..........................................................................................11
Wrong Motor Connection Protection .....................................................................11
12. Frequently Asked Questions.....................................................................................11
Problem Symptoms and Possible Causes .............................................................. 12

1. Introduction, Features and Applications
Introduction
The KL-11078 is a high voltage and high performance microstepping driver based on one of the most
advanced technologies in the world today. Its suitable for driving 2-phase and 4-phase hybrid
stepping motors. By using advanced bipolar constant-current chopping technique, the KL-11078 can
output more torque than other drivers at high speed. The microstep capability allows stepping motors
to run at higher smoothness, less vibration and lower noise. Its 3-state current control technology
allows coil current to be well controlled with relatively small current ripple, therefore less motor
heating is achieved.
Features
l
High quality, low price
l
Low heating for motor & driver
l
Supply voltage up to220VAC
l
Output current up to 7.8A(5.57 ARMS)
l
TTL compatible and Opto-isolated inputs
l
Automatic idle-current reduction
l
Input frequency up to 400KHz
l
16 microstep resolutions selectable
l
Suitable for 2-phase and 4-phase stepping
motors
l
DIP switch current setting
l
CW/CCW mode selectable
Applications
Suitable for large and medium automation machines and equipments, such as engraving machines,
labeling machines, cutting machines, laser phototypesetting systems, plotting instruments, NC
machines, pick-place devices, and so on. Particularly adapt to the applications desired with low
vibration, high speed and high precision.

2. Specifications
Electrical Specifications (T
j
= 25C)
KL-11078
Parameters
Min
Typical
Max
Unit
Output current
0.42 (0.3A RMS)
-
7.8
A
Supply voltage
80
180
220
VAC
Logic signal current
7
10
16
mA
Pulse input frequency
0
-
400
Khz
Isolation resistance
500


M
KL-11078 Microstepping Driver Manual

Mechanical Specifications (unit: mm, 1 inch = 25.4 mm)

Figure 1: Mechanical specifications
Operating Environment and Other Specifications
Cooling
Natural Cooling or Forced cooling
Environment
Avoid dust, oil fog and corrosive gases
Ambient Temperature
0C 50C
Humidity
40%RH 90%RH
Operating Temperature
70 Max
Operating
Environment
Vibration
5.9m/s
2
Max
Storage Temperature
-20C to 65C
Weight
Approx. 1.16 kg (41 oz)
Elimination of Heat
l Drivers reliable working temperature should be <65C, motor working temperature should be
<80C;
l Forced cooling the driver if its necessary. KL-11078 Microstepping Driver Manual

3. Pin Assignment and Description
The KL-11078 has two connectors, connector P1 for control signals connections, and connector P2
for power and motor connections. The following tables are brief descriptions of the two connectors of
the KL-11078. More detailed descriptions of the pins and related issues are presented in section 4, 5,
9.
Connector P1 Configurations
Pin Function
Details
PUL+(+5V)
PUL-(PUL)
Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse
signal, effective for each rising edge; 4-5V when PUL-HIGH, 0-0.5V when
PUL-LOW. In double pulse mode (pulse/pulse) , this input represents
clockwise (CW) pulseeffective for high level. For reliable response, pulse
width should be longer than 1.2s. Series connect resistors for current-limiting
when +12V or +24V used.
DIR+(+5V)
DIR-(DIR)
DIR signal: In single-pulse mode, this signal has low/high voltage levels,
representing two directions of motor rotation; in double-pulse mode (set by
SW5), this signal is counter-clock (CCW) pulse, effective for high level. For
reliable motion response, DIR signal should be ahead of PUL signal by 5s at
least. 4-5V when DIR-HIGH, 0-0.5V when DIR-LOW. Please note that motion
direction is also related to motor-driver wiring match. Exchanging the
connection of two wires for a coil to the driver will reverse motion direction.
ENA+(+5V)
ENA+(ENA)
Enable signal: This signal is used for enabling/disabling the driver. High level
for enabling the driver and low level for disabling the driver. Usually left
unconnected (enabled).
READY+
Alarm signal positive: READY+ is a photocouper output from open-collector
circuit, effectively output when driver operate normally, maximum permitted
input voltage is 30VDC; maximum output current 20mA. It generally can be
serial connected to PLC input terminal.
READY-
Alarm signal negative.
Notes: SW5 ON means CW/CCW (pulse/pulse) mode, and SW5 OFF means PUL/DIR mode.
Connector P2 Configurations
Pin Function
Details
AC
AC
AC power supply inputs. Recommend use isolation transformers with
theoretical output voltage of +80V+ 180 VAC, leaving room for power
fluctuation and back-EMF.
A+, A-
Motor phase A.
B+, B-
Motor phase B.
PE
Ground terminal. Recommend connect this port to the ground for better
KL-11078 Microstepping Driver Manual

safety.
4. Control Signal Connector (P1) Interface
The KL-11078 can accept differential and single-ended inputs (including open-collector and PNP
output). The KL-11078 has 3 optically isolated logic inputs which are located on connector P1 to
accept line driver control signals. These inputs ar