Core Configuration

Number of channels: 32 digital input channels

Input type: 24VDC dry contact input

Work architecture: Three-out-of-Two TMR redundant voting mode

Wiring method: Wired at the site using the dedicated FTA terminal board

Supports hot-swappable design, allowing for on-site replacement without downtime Electrical parameters

Module working power supply: 24VDC

Input method: Passive contact closure conducts, no external power supply required

Conduction condition: Signal can be collected when the on-site switch is closed

Grouping form: 8 channels are designed as one group

Electrical isolation: Equipped with reliable isolation protection, resistant to on-site interference

Operating temperature: -40℃ to +70℃

It comes with channel status indicator lights and supports self-check for line faults

Complies with IEC61508 international safety standards Product features

Pure dry contact collection, compatible with various passive switch contacts, with extremely strong versatility

Triple redundant safety design, with strong fault tolerance, and stable operation in high-risk working conditions

32-channel high-density design, significantly saving cabinet installation space

No need to provide signal power supply on-site, wiring is simple, and construction is convenient

Easy configuration operation, compatible with Tricon full series programming software

Industrial wide-temperature design, suitable for complex on-site environments such as chemical and power industries Applicable scenarios

Emergency stop buttons for chemical and petrochemical plants, collection of on-site passive switch signals

Connection of various passive limit switches and travel switches for boilers and steam turbines in power plants

Passive feedback signals from flame probes and gas detectors in F&G fire protection systems

Collection of various mechanical contacts and safety interlock switches without voltage output at the site

Identification of the same series models

3501E: 32 channels, 115V AC/DC input

3502E: 32 channels, 48V AC/DC input

3503EN: 32 channels, 24V wet contacts with active input

3504E: 32 channels, 24V dry contacts without active input