Contact Sales Department for Pricing New Remote I/O CPU Unit 4 Slots Modbus CONPROSYS nano VCCI-A · FCC-A · CE · UKCA Remote I/O CPU unit for CONPROSYS nano with 4 expansion slots. The CPSN‑MCB271‑S1‑041 features RS‑232C and single LAN, while the CPSN‑MCB271‑1‑041 offers dual LAN with switch function for...
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Remote I/O CPU unit for CONPROSYS nano with 4 expansion slots. The CPSN‑MCB271‑S1‑041 features RS‑232C and single LAN, while the CPSN‑MCB271‑1‑041 offers dual LAN with switch function for daisy‑chain networking. Both support Modbus TCP Slave and Modbus RTU Slave, wide temperature range (-20 to +60°C), and tool‑less I/O module installation. From Contec Americas.
4Expansion Slots
180MHz ARM Cortex-M3
921.6kbps RS-232C (S1)
60°C Max Operating
Contec Americas · CONPROSYS nano
CPSN‑MCB271‑S1‑041 / 1‑041
Remote I/O CPU · 4 Slots · Modbus · RS‑232C (S1) · LAN HUB (1)
The CPSN‑MCB271‑S1‑041 and CPSN‑MCB271‑1‑041 are remote I/O CPU units for the CONPROSYS nano series, providing a central controller for up to 4 I/O modules. Based on an ARM Cortex‑M3 processor (180MHz), they support Modbus TCP Slave and Modbus RTU Slave protocols for seamless integration with industrial control systems. The units feature a compact design, wide operating temperature range, and flexible installation options.
CPSN‑MCB271‑S1‑041
1x LAN port (10/100BASE-TX)
1x RS‑232C (921,600 bps)
4 expansion slots
Modbus TCP/RTU Slave
Virtual COM driver support
CPSN‑MCB271‑1‑041
2x LAN ports (switch function)
Daisy‑chain networking
4 expansion slots
Modbus TCP/RTU Slave
No RS‑232C port
Choose the right model – the CPSN‑MCB271‑S1‑041 includes an RS‑232C serial port for legacy device connectivity, while the CPSN‑MCB271‑1‑041 features two LAN ports with integrated switch for daisy‑chain network configurations.
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Built for Industrial Automation
Designed for demanding factory automation, remote I/O, and machine control applications. Both CPU units operate across a wide temperature range (-20 to +60°C) and feature robust power input with surge protection. The tool‑less I/O module installation and DIN‑rail or screw mounting options simplify system integration and maintenance.
4 expansion slots – Freely add CONPROSYS nano I/O modules to match your application needs.
Wide temperature range – Operates from -20 to +60°C for installation in diverse environments.
Modbus support – Compatible with Modbus TCP Slave and Modbus RTU Slave for industrial communication.
Flexible installation – Mount on 35mm DIN rail or with screws (vertical installation).
Long life design – No electrolytic capacitors for extended product life.
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Full Specifications
Specification
Detail
Model
CPSN-MCB271-S1-041 / CPSN-MCB271-1-041
CPU
ARM Cortex-M3 180MHz
Memory (SDRAM)
16MB on board
ROM (NOR Flash)
4MB for OS
LAN (S1 model)
1 channel, 10BASE-T/100BASE-TX
LAN (1 model)
2 channels (switch function), 10BASE-T/100BASE-TX
RS-232C (S1 only)
1 channel, 110 – 921,600 bps, non-isolated
RS-232C data length
5, 6, 7, 8 bits, 1/1.5/2 stop bits
RS-232C parity
Even, Odd, Non-parity
Expansion slots
4 slots, 12-24V 200mA, 5V 250mA, 3.3V 200mA per slot
LED
PWR(Green), RUN(Green), STS(Green), ERR(Red)
RTC accuracy
±15 sec/month (25°C)
Power input
12 – 24VDC (10.8 – 30VDC)
Power consumption (CPU only)
24V 0.08A typ. / 12V 0.15A typ.
Power consumption (with modules)
24V 1.5A max / 12V 2.0A max
Dimensions (mm)
110(W) × 74.8(D) × 95(H)
Weight
250g
Installation
35mm DIN rail or screw mounting
Operating temperature
-20 to +60°C (depending on installation)
Operating humidity
10 – 90%RH (no condensation)
Standards
VCCI Class A, FCC Class A, CE (EMC Class A, RoHS), UKCA, ISED
Included items
Unit, power connector, blank panels (3), manual
Datasheet version
As of June 2026
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Optional Accessories
Product Name
Model
Description
DIN rail fitting power supply 30W
CPS-PWD-30AW24-01
Input: 100‑240VAC, Output: 24VDC 1.3A
DIN rail fitting power supply 90W
CPS-PWD-90AW24-01
Input: 100‑240VAC, Output: 24VDC 3.8A
AC power cable (3‑round‑end terminal)
IPC-ACCODE3
2m length, 7A 125V rating
I/O modules
Various CPSN series
Analog/digital I/O, relay, counter, serial
Visit the CONTEC website for the latest optional products and compatible I/O modules.
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Certifications and Compliance
VCCI Class A — Japanese voluntary control for electromagnetic interference (commercial/industrial environments).
FCC Class A — U.S. emissions compliance for industrial use environments.
CE (EMC Directive Class A, RoHS Directive) — European conformity for electromagnetic compatibility and restriction of hazardous substances.
UKCA — UK Conformity Assessed marking for UK market compliance.
ISED — Innovation, Science and Economic Development Canada compliance.
Ready to build your CONPROSYS nano remote I/O system?
The CPSN‑MCB271‑S1‑041 and CPSN‑MCB271‑1‑041 are available through Contec Americas on a quote basis. Contact our sales team to discuss model selection, quantity, I/O modules, and integration with your industrial automation systems.
