SDI208

Overview

SDI208 is a Bachmann safety digital input module with 16 digital inputs, supporting redundant use in pairs (PL e / SIL3 / Cat 4).

Digital Inputs

• Number of inputs: 16, usable redundantly in pairs

• Input voltage range (H): 15 V DC to 34 V DC

• Input voltage range (L): -34 V DC to +5 V DC

• Input delay (HW): 300 µs (typical)

• Input delay (SW): 1 ms (typical, when test pulsing disabled)

• Input type: IEC 61131-2 Type 1

• Minimum input current: 3.5 mA at 24 V DC

• Status indication: Green LED

• Error monitoring: Internal monitoring, optional external test pulsing

Internal Power Supply

• Galvanic isolation (system): 500 V

• Galvanic isolation (between groups): 500 V

• Supply source: Backplanes BS2xx

• Current consumption: 5 V / 500 mA via backplane

External Power Supply

• Reverse polarity protection: Yes

• Input voltage: 24 V DC (18 to 34 V DC)

• Current consumption: Typ. 65 mA at 24 V DC plus sensor/encoder load

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