제품소개

제품소개

NI-9421 DS / 779136-01

ㆍ▷ 24 V, 8 채널(싱킹 입력), 100 μs C 시리즈 디지털 모듈

ㆍ▷ 8-channel, 100 µs digital input

ㆍ▷ 24 V logic, sinking digital input

ㆍ▷ Compatible with NI CompactDAQ counters

Data sheet

Features
• 8-channel, 100 µs digital input
• 24 V logic, sinking digital input
• Compatible with NI CompactDAQ counters
• 60 VDC, CAT I (DSUB) or 250 Vrms, CAT II (screw
    and spring terminal) isolation
• 25-pin DSUB, 10-position spring-terminal, or 10-
    position screw-terminal connectors available
• -40 °C to 70 °C operating, 5 g vibration, 50 g shock

Specification & Introduction
 Input Characteristics
• Number of channels 
    8 digital input channels
• Input type 
    Sinking
• Digital logic levels
    OFF state
        Input voltage 
            ≤5 V
        Input current 
            ≤300 μA
    ON state
        Input voltage 
            11 V to 30 V
        Input current 
            ≥3 mA
• I/O protection
    Input voltage 
        40 V maximum
    Reverse-biased voltage 
        -30 V maximum
    Input current 
        7 mA maximum, internally limited
• Input delay time 
    100 μs maximum
• MTBF 
    2,086,204 hours at 25 °C; Bellcore Issue 2,
    Method I, Case 3, Limited Part Stress Method
 Power Requirements
• Power consumption from chassis
    Active mode 
        240 mW max
    Sleep mode 
        7 mW max
• Thermal dissipation (at 70 °C)
    Active mode 
        1.3 W max
    Sleep mode 
        1.1 W max
 Physical Characteristics
• Screw-terminal wiring
    Gauge 
        0.2 mm2to 2.5 mm2 (26 AWG to 14 AWG)
        copper conductor wire
    Wire strip length 
        13 mm (0.51 in.) of insulation stripped from the end
    Temperature rating 90 °C minimum Torque for screw terminals 
        0.5 N · m to 0.6 N · m (4.4 lb · in. to 5.3 lb · in.)
    Wires per screw terminal 
        One wire per screw terminal; two wires per 
        screw terminal using a 2-wire ferrule

Ordering Information