New Original Germany Siemens 6ES7421-1FH00-0AA0 SM421 16-Channel Galvanically Isolated Digital Input Module UC120/230V AC/DC For S7-400 PLC
Complete order number: 6ES7421-1FH00-0AA0 (upgraded replacement model: 6ES7421-1FH20-0AA0)
Product Model: SM 421 16DI High Voltage Universal Digital Input Module
Adaptation system: Siemens SIMATIC S7-400 full series CPU, S7-400H redundant hot standby control system, supporting hot swapping
Origin: Made in Germany
Channel configuration: 16 digital input channels, with a set of photoelectric isolation for every 4 channels. The isolation withstand voltage is 1500V AC, and there are a total of 4 independent isolation circuits with strong resistance to power grid surges and common mode interference
Rated input voltage: UC 120/230V AC/DC universal (AC 74~264V/DC 80~264V, power frequency 47~63Hz)
Signal 0 level: AC 0~40V/DC -40~+40V
Signal 1 level: AC 74~264V/DC ± 80~± 264V
Typical input current: 14mA under 230V AC condition; 10mA under 120V AC condition; 1.8-2mA under DC condition
Fixed input filtering delay: AC mode 20ms (0 → 1)/30ms (1 → 0); DC mode 15ms (0 → 1)/25ms (1 → 0), can filter out grid harmonics, mechanical switch jitter and false triggering
Transmission distance: Shielded twisted pair cable up to 1000 meters, suitable for long-distance high-voltage switch signal acquisition in the factory area
Diagnostic function: supports group fault status reading, SF system fault indicator light alarm, and can read module operation abnormal information in STEP7
Status indicator: Each channel is equipped with a green LED status indicator light to visually view the on/off status of the on-site contacts
Power supply parameters: The maximum consumption of the backplane 5V is 80mA, and the typical power consumption of the module is 12W
Wiring accessories: A 40 pin front connector (6ES7492-1AL00-0AA0) needs to be separately selected, and the module does not include wiring terminals at the factory
Physical specifications: S7-400 single slot UR rack installation, dimensions 25mm × 290mm × 290mm, net weight approximately 815g
Working environment: 0 ℃~+60 ℃ rack operating temperature, IP20 protection, in compliance with industrial EMC anti-interference standards
Product status: First generation discontinued model, hardware directly compatible with 1FH20 new version, mostly used for replacing spare parts in old high-voltage industrial control projects at home and abroad
Source status: Brand new factory sealed stock, 12-month warranty, supports global bulk supply of spare parts for foreign trade