Basic Information

Shell: Flame-retardant industrial plastic, 35mm DIN rail mounting

Wiring: 24VDC spring terminals

Protection: IP20; I/O channels have polarity reversal, short circuit, and 30V overvoltage protection

Special: KBA three-proof coating (damp-proof, mold-proof, salt fog-proof), suitable for harsh environments

Certification: CE, RoHS

Dimensions: 67.5 × 76 × 62 mm

Weight: Approximately 0.159 kg

Function and Positioning

8 Digital Inputs (8DI): 24VDC, NPN/PNP universal

16 Digital Outputs (16DC): 24VDC / 0.5A / point, transistor output, short circuit protection

Bus: CS31 single-line bus, as a remote I/O slave station

Expansion: Can be connected up to 7 S500 I/O modules

Features: KBA coating enhances corrosion resistance, supports hot swapping

Core Parameters

Operating Voltage: 24VDC ±10%

Input: 8DI, 24VDC, sink/source compatible

Output: 16DC, 24VDC, 0.5A / point, short circuit protection

Bus: CS31 (1-wire)

Operating Temperature: 0～+60℃

Storage Temperature: -40～+70℃

Difference from 1SAP220500R0001

1SAP220500R0001: DC551-CS31, standard coating, ordinary environment

1SAP220500R3001: DC551-CS31-KBA, KBA three-proof coating, preferred for damp / dust / seaside and other harsh environments

Compatibility and Applications

Compatible PLCs: AC500 / AC500-eCo / AC500-S Application scenario:

Expansion of the old-line CS31 system

Textile, packaging, rubber and plastic machinery

Water treatment, HVAC, outdoor / seaside equipment (KBA version)