LU-S14000 Series I/O Modules

Overview
The LU-S14050 digital eight-input and eight-output module operates in single-ended common-ground mode. The 8 digital inputs support dry contacts and wet contacts; for wet contacts the high level range is +3—30V and the low level range is 0—+1V; for dry contacts a 10K pull-up resistor is built in with a bias current of 0.5mA, so that the module works properly with both active inputs and passive inputs such as push-button switches. The 8 digital outputs use open-collector output and require an external active load, withstanding up to 30V and up to 200mA operating current. It supports the Modbus protocol and uses the RS-485 bus for communication transmission. The power supply, I/O and communication are protected by 3000V isolation, preventing ground loops and reducing the possibility of equipment damage caused by power surges and lightning strikes.

Main features
Superior immunity to interference (EMC)
•High ESD immunity Test results: air discharge ±12KV; contact discharge ±6KV
•Easily passes 3KV fast transient burst interference (EFT test)
•Lightning surge impact protection ±2KV
•Radiated noise immunity test An analog noise interference source is provided through a winding (Impulse voltage: 1KV, Impulse width: 1us); no abnormality after 10 min of application
•Voltage dips, short interruptions and voltage variation immunity test Power supply ramp ±20%Ut, time ramp 2s±20% Voltage dip and temporary interruption 40%Ut, duration 5s

Digital input
•Number of channels: 8
•Dry contact: logic 0: shorted to ground; logic 1: open. Wet contact: logic 0: max +1V; logic 1: +3.5V~+30V

Digital output
•Number of channels: 8 Open-collector output under max load 30V, 30mA
•Power consumption: 300mW

Communication
•Mode: RS-485
•Protocol: Modbus
•Isolation voltage: 3000Vdc
•Surge protection, lightning protection: yes

Built-in watchdog timer
Power supply
•Power requirement: +10~+30Vdc (unregulated)
•Power consumption: 1.0W