Model Interpretation

3611E: 8Ch isolated supervised 115VAC TMR DO; E = enhanced diagnostic version; exclusive mating terminal:3611R; AC safety output, different from 24VDC transistor/relay DO series.

Technical Parameters

Electrical Spec

Channel:8 fully isolated non-common AC output

Nominal field:115VAC (90~132VAC operating range, 50/60Hz)

Single channel continuous:0.5A, surge 3.5A/10ms; min load ≥25mA for open-circuit supervision

Off-state leakage ≤3.5mA; independent channel fuse fitted on 3611R base

Field-to-backplane isolation:2000VAC galvanic isolation

Backplane power ≤11W; auto short-circuit recovery protection

Safety & Redundancy

Architecture:TMR 2oo3 hardware voting; single branch fault avoids spurious trip/fail-to-shutdown

Certification:IEC61508 SIL3, TÜV, UL, CE, FM, ATEX

Diagnostics:per-channel pulse test + load readback, detect wire break, open load & short; fault coverage＞99.9%

SOE ≤40ms; MTBF＞133000H

Mechanical & Environment

Single slot 3U module; dimension 114×30×185mm; weight≈1.12kg; ivory front panel

Operating:−40℃~+70℃; storage −55~+85℃; humidity 5%~95%RH non-condensing

LED indicators: PASS, FAULT, ACTIVE, LOAD

Core Functions

Supervised 115VAC safety drive for critical AC solenoid/shutdown relays; non-intrusive periodic pulse check confirms field loop integrity without unintended valve action; TMR redundant circuit ensures SIL3 safety requirement; online hot swap without system halt; fault info uploaded to TriStation for troubleshooting.

Applications

Offshore/onshore oil&gas 115VAC ESD shutdown solenoid control; refinery HIPPS AC cut-off valve drive; petrochemical flare safety interlock; power plant boiler/turbine AC trip relay output; F&G fire suppression AC actuator control.

Brief Comparison

3611E:8Ch isolated supervised 115VAC DO |3627:16Ch sink supervised 120VDC DO |3623:16Ch non-supervised 120VAC/DC DO

Isolated AC safety output |High voltage DC safety output |General auxiliary AC/DC output