2.5kV PLC Input Isolator with

MFG Part #:


Part #:
Lead Time 52 weeks
RoHS Status:
Unit Price:$2.56
Minumum Qty: 1250
Need a lower quantity?
Ask a Question
Call Me
Email This Page

Product Information

Back to top
Bipolar Digital Field Inputs for PLCs and Industrial I/O Modules

The Si838x provides eight channels for 24 V digital field interface to either sinking or sourcing inputs with integrated safety rated isolation. In combination with a few external components, this provides compliance to IEC 61131-2 switch types 1, 2, or 3. The input interface is based on Silicon Labs' ground-breaking CMOS based LED emulator technology which enables the bipolar capability (sinking or sourcing inputs) with no VDD required on the field side. The output interface to the controller allows for low power operation with 2.25 V operation capability. These products utilize Silicon Laboratories' proprietary silicon isolation technology, supporting up to 2.5 kVRMS withstand voltage. This technology enables high CMTI (50 kV/μs), lower prop delays and skew, reduced variation with temperature and age, and tighter part-to-part matching.

Product options include parallel or serialized outputs. Cascading capability for a total of 128 channels (16x Si838x) is possible with serial output option. The Si838x offers longer service life and dramatically higher reliability compared to opto-coupled input solutions.

Symmetry Electronics is an authorized Silicon Labs distributor.


Back to top
Bipolar digital interface with 24 V sinking or sourcing inputs
Eight total inputs in one package
High data rates of up to 2 Mbps
Safety rated integrated isolation of 2.5 kVrms
Low input current of 1 mA typ
No VDD required on field side
Status LEDs on parallel outputs
High electromagnetic immunity
Programmable debounce times of up to 100 ms
Transient immunity of 50 kV/s
Flow-through output configuration with eight outputs
Option for SPI interface serialized outputs with daisy-chain capability
Wide 2.25 to 5.5 V VDD operation
Wide operating temperature range
40 to +125 C
Compliant to IEC 61131-2
Type 1, 2, 3
RoHS-compliant packages


Back to top

Previously Viewed Products

2.5kV PLC Input Isolator with
Part #: SI8380PF-IUR
2.5kV PLC Input Isolator with