8121-DI-DC

Description

8121-DI-DC is a 16-channel discrete input module from MTL, non-isolated and module-powered.

Inputs

• Number of Channels: 16

• Off Current: <0.3 mA

• On Current: >1.2 mA

• Wetting Current: 2.8 mA (typ.)

• Minimum Pulse Width: 5 ms

• Max Input Frequency (Pulse Counting Mode): 100 Hz

• Isolation: Any channel to Railbus – 250 V AC

Configurable Parameters

• Input Filter: Fast, slow, or user-defined (0–512 ms in 2 ms steps)

• Latch Inputs: Enable/Disable

• Latch Polarity: High/Low

• Pulse Counting: Enable/Disable

Response Time

• I/O Response: Field event to Railbus – 5 ms max

Safety

• FM Non-incendive Field Wiring: Voc=30 V, Isc=3.5 mA, Ca=0.12 μF, La=1000 mH

Power

• Railbus (12 V) Current: 90 mA typ., 135 mA max

• Bussed Field Power: 60 mA @ 18–30 V DC

Mechanical

• Module Key Code: E1

• Width: 42 mm

• Weight: 210 g

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