Core parameters

Channels: 8 channels of electrical isolation, 24VDC active DO

Load: 2A per channel, total module rated at 8A

Isolation withstand voltage: 250VAC (channel - backplane electrical isolation)

Architecture: TMR triple redundancy, 2oo3 fault safety voting

Operating temperature: -40°C ~ +85°C (3708E only - 40~+70°C)

Power supply: 18~30VDC (rated 24VDC)

Features: Full-channel open circuit / short circuit / overload diagnosis, hot-swappable online replacement, fault safety self-locking

Certifications: SIL3, CE, UL, CSA, ATEX Zone2

3708EN vs 3708E Core Differences

Temperature rating

3708E: -40~+70°C

3708EN: -40~+85°C, designed for high-temperature conditions

Diagnostic upgrades

3708EN adds channel aging, surge anomaly, long line impedance detection Compatibility

Backplate pins, wiring, and configuration are fully compatible with 3708E and can be directly replaced.

Life and immunity to interference

3708EN has significantly improved temperature resistance, vibration resistance, and long-term high-temperature stability.

Typical applications

High-temperature field ESD emergency stop, electromagnetic valves / shut-off valves in high-temperature areas, BMS in furnace areas, SIS interlocks in high-temperature oil and gas environments, and output for demanding working conditions in fire and gas systems.