T8850C keeps the same 40-channel, software-selectable analog-or-digital soul as T8850, but adds: • Cold-start surge clamp – loop cards no longer dip when field power is re-applied
• Conformal-coated PCB (IPC-610-3C) – 5× salt-fog life, perfect for offshore or coastal skids
• Cable-saving “C-coded” spring terminals – accept 0.34 mm² up to 2.5 mm² without ferrules
• Configurable group-level OVP (Over-Voltage Protection) – 28 V, 32 V, 36 V trip via TriStation 1131 v4.9
• Certified for IEC 61326-3-2:2021 EMC – immunity to 30 V/m radiated field, 2 kV surge on signal lines
side-by-side table
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Feature / Spec
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T8850 (legacy)
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T8850C (current)
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PCB coating
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None
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Full conformal, 50 µm
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Salt-fog endurance
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96 h
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500 h (ASTM B117)
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Spring terminal range
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12-28 AWG
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0.34-2.5 mm² (22-14 AWG)
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Max radiated immunity
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10 V/m
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30 V/m
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Group OVP setting
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Fixed 33 V
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TriStation-selectable 28/32/36 V
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Cold-start surge clamp
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No
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Yes (< 5 A inrush limit)
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Housing color
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Light gray
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Anthracite gray
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LED indication
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Single color
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Dual-color + flash code
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TriStation minimal version
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v4.6
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v4.9
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RoHS
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RoHS 5/6
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RoHS 10/10
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Availability (PLC Autocontroller stock)
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Last-buy phase
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Active production
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Where the “C” scores money Offshore platforms: coating + salt-fog = 8 extra years before first deck-box replacement.
OEM skid builders: selectable OVP lets you use the same FTA for 24 Vdc solenoids AND 28 Vdc sounder beacons—one SKU instead of two.
Retrofit jobs: anthracite color instantly tells technicians “new revision—check TS1131 version”, reducing mis-wiring tickets.
Quick-fit compatibility • Rack: same 110 × 360 mm DIN-rail cut-out – drop-in swap.
• Cable schedule: identical core numbers; only outer jacket diameter can increase by 0.2 mm due to C-coded key.
• Logic: TMR lane mapping unchanged; TriStation project needs v4.9+ to see OVP menu.
What happens next?
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Your quote
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