LU-S14000 Series I/O Modules

Overview
LU-S14013 is a 16-bit A/D three-channel RTD input module that can acquire two-wire, three-wire or four-wire RTD input signals. It supports acquisition of multiple RTDs including PT10, PT100, PT200, PT500, PT1000, CU50 and CU100, and provides broken-wire detection. A voltage isolation of 2500V is provided between the analog input channels and the module, effectively preventing the module from being damaged by high-voltage surges. It supports the Modbus protocol and uses the RS-485 bus for communication transmission, with a built-in optocoupler providing 3000V isolation voltage. It features surge protection, spike absorption and lightning protection.

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

Analog input
• Effective resolution: 16 bits
• RTD types and temperature ranges
Type Test temperature RTD TCR Accuracy
Pt10 -200°C~+800°C Pt100 0.003851 0.05% or better
Pt200 0.003816
Pt500 0.003850
Pt1000 0.003910
Cu50 -50°C~+150°C 0.1% or better
Cu100
• Isolation voltage: 2500Vdc
• Sampling rate: 10 samples/s
• Input impedance: 20MΩ
• Input surge protection: yes
• Bandwidth: 2.62Hz
• Input wiring: 2-, 3- or 4-wire
• Zero drift: ±3μV/°C
• Full-scale drift: ±25ppm/°C
• CMR @ 50 / 60Hz: 150dB
• NMR @ 50 / 60Hz: 100dB

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: 1.6W