Core parameters

Channels: 32 isolated digital inputs (DI), no common terminal

Input voltage: 115V AC/DC (AC: 90–155V, 47–63Hz; DC: 90–155V)

Input configuration: Each point can be set as NO/NC (normally open / normally closed)

Redundancy architecture: TMR (triplex redundancy), 2oo3 voting, no single-point failure

Isolation: Complete isolation between channels, system / field-side isolation, optocoupler isolation

Diagnosis: LED status indicator for each channel, open circuit / short circuit / power failure diagnosis

Working voltage: 24VDC ±10% (module power supply)

Power consumption: Approximately 8W

Operating temperature: -40°C ~ +70°C

Certifications: SIL3, CE, UL, CSA, ATEX Zone 2, TÜV

Installation: Tricon standard 19" I/O rack, hot-swappable support

Size / Weight: Approximately 483×254×51mm / 2.3–2.7kg

Features and benefits

115V high-voltage DI acquisition: Compatible with 115VAC/DC switches, limiters, relay contacts in the field, no additional relays required

TMR triple redundancy: Three-channel independent sampling, 2oo3 voting, fault-tolerant operation, online replacement

Fully isolated design: 32 points completely isolated, resistant to ground current, interference, suitable for harsh conditions

Comprehensive diagnosis: Channel-level LED and system diagnosis, precise fault location, efficient maintenance

SIL3 safety certification: Meets IEC 61508, used for ESD, F&G, BMS, HIPPS safety circuits

Typical applications

Oil and gas / chemical: 115V solenoid valves, limiters, emergency stop buttons status acquisition

Power plants / metallurgy: Turbine / boiler auxiliary machine switches, combustion engine ignition system, fire protection system signal monitoring

SIS/ESD system: Critical equipment safety-level digital input, building SIL3 interlock circuits

F&G fire protection system: Flame detectors, gas alarms, sprinkler valves status input

Matching list

Controller: 1600071-001B (Tricon TMR CPU)

FTA terminal board: 3501E paired with FTA (115V DI terminal board)

Modules of the same series: 3502E (48V DI), 3503E/3504E (24V DI)