Bachmann DIO232 Digital I/O Module – Industrial Automation

High-Density I/O Expansion for M200 Automation Systems

The Bachmann DIO232 module enhances M200 controller platforms with flexible digital inputs and outputs. I describe its channel configuration, voltage ranges, and protection features using clear and technically accurate language.

Versatile Channel Configuration for Complex Industrial Signals

The DIO232 manages sensors, switches, photocells, contactors, relays, and solenoid valves. It offers up to thirty-two digital channels, and it lets you assign sixteen of them as either inputs or outputs. Each channel includes a dedicated LED indicator, while eight channels support interrupt-driven events for faster reaction times in dynamic automation tasks.

Technical Specifications

Digital Input Specifications

Parameter	DIO232 / DIO232 CC
Input Channels	16–32
High-Level Voltage	15–34 V DC
Low-Level Voltage	0–5 V DC
Input Filter Range	40 µs to 365 ms (default 3 ms)
Internal Resistance	6.8 kΩ
Status LEDs	Green
Interrupt Inputs	8

Digital Output Specifications

Parameter	DIO232 / DIO232 CC
Output Channels	Max. 16
Output Voltage	18–34 V DC
Max. Current per Channel	0.5 A
Max. Total Current	8 A
Status LEDs	Green
Max. Switching Frequency	1 kHz (resistive)

Electrical & Protection

Reverse Polarity Protection: Yes
Galvanic Isolation from System: 500 V
External Supply Voltage: 18–34 V DC

Environmental & Certification Data

Category	Details
Operating Temperature	–30 °C to +60 °C
Storage Temperature	–40 °C to +85 °C
Humidity (operation)	5–95% (non-condensing or condensing version)
Humidity (storage)	5–95% with condensation
Pollution Degree	2 (IEC 60664-1)
General Approvals	CE, UKCA, cULus
Marine Approvals	ABS, BV, DNV, KR, LR, NK, RINA

Performance and Installation Benefits

The DIO232 combines compact size with high channel density, and it reduces wiring effort through efficient 3-wire connection techniques within the DIO series. It also improves diagnostic visibility using per-channel LED displays and supports fast signal processing with configurable input filters.