Which control modes does KTC838A support?
KTC838A supports tension-sensor feedback for closed-loop control and proximity-switch or encoder input for automatic calculation open-loop control.
KTC838A
Product Image
Product Introduction
KTC838A is a high-precision full-digital automatic tension controller. It can build a closed-loop system with tension detectors, or run automatic calculation-based open-loop control through proximity switch/encoder inputs, combining the capabilities of KTC818A and KTC828A. It outputs 0-24VDC for magnetic powder clutch/brake and 0-10V for inverter, servo motor, or other actuators, suitable for printing, packaging, paper, cable, rubber-plastic, battery and textile lines.
Key Features
- 128x96 graphic LCD with Chinese/English display
- Fully digital design, simple calibration, accurate and stable measurement
- Supports single/dual sensor input: differential 200mV (5V), strain-gauge 20mV (10V), dancer potentiometer mode
- Supports taper tension control with thickness accumulation and ratio-based roll diameter calculation
- No-overshoot PID algorithm for stable start/stop tension
- Dual-shaft switching and acceleration/deceleration control
- Bumpless Auto/Manual switching and password protection
- Optional RS485 Modbus communication with PLC/PC systems
- Wide-range power input: 165-264VAC for long-term reliable operation
Technical Parameters
Model
KTC838A
Control Mode
Closed-loop + automatic calculation open-loop
Sensor Inputs
Single/Dual channel tension sensor input
Differential Sensor Spec
Input 200mV, supply 5VDC
Strain Gauge Sensor Spec
Input 20mV, supply 10VDC
Switch Inputs
3 channels
Analog Inputs
2 channels, 0-10V
Digital Input
NPN proximity switch / encoder, max 15KHz
Measurement Accuracy
±0.2%FS ±1 digit, sampling period 100ms
Control Algorithm
PI (Proportional-Integral)
Main Output
2 channels, 24V/4A, direct drive for magnetic powder clutch/brake
Auxiliary Output
2 channels, 0-10V (or 4-20mA), for inverter/servo/I-P actuator
Alarm Output
Normally-open relay
Communication
RS485, standard Modbus
Dimensions
246(W) x 154(H) x 156.5(D) mm
Power Supply
165-264VAC, 50/60Hz
Installation Drawing
Note: All dimensions in this section are in mm.
Wiring Diagram
KTC838A quick answers
Which feedback inputs can KTC838A accept?
The listed inputs include single or dual 200mV differential sensors, 20mV strain-gauge sensors and a dancer potentiometer. Confirm excitation and wiring.
Which outputs does KTC838A provide?
The controller lists two 24V/4A outputs for magnetic powder clutches or brakes and two 0-10V or 4-20mA auxiliary outputs for an inverter, servo or I-P actuator. Confirm power and scaling.