cBallast
Industrial Parts Catalog
Datasheet generated 2026-10-07
sales@cballast.com
cballast.com

Digital input module; 20 digital inputs (178768)

Eaton · Control & Automation · I/O Modules · Ireland · eaton.com
Part Number
178768  ·  HS 8538.90
Digital input module; 20 digital inputs (178768)

Eaton 178768 Digital input module; 20 digital inputs 24 V DC each; pulse-switching; 0.5 ms.

Technical Specifications

Manufacturer part number (MPN)178768
EAN / GTIN7640130098329
Sales unitpcs
Eaton catalogue number178768
Depth104.2 mm
Height16.8 mm
Width80.3 mm
Weight0.054 kg
CertificationsUL File No.: E135462; cULus; CE; EN 61131-2; EN 61000-6-2; EN 61000-6-4; UL508; CSA-C22.2 No. 142-M
Catalog NotesThe max. heat dissipation is specified as the maximum power produced inside the device's housing.
Height of fall (IEC/EN 60068-2-32) - max1 m
Mounting positionHorizontal
Shock resistance15 g, Mechanical, Half-sinusoidal shock 11 ms, 18 Impacts
Vibration resistance5 - 8.4 / 8.4 -150 Hz, 3,5 mm / 1 g
Air pressure795 - 1080 hPa (operation)
Ambient operating temperature - max55 °C
Ambient storage temperature - max85 °C
Ambient operating temperature - min0 °C
Ambient storage temperature - min-20 °C
Climatic proofingDry heat to IEC 60068-2-2; Damp heat, constant, to IEC 60068-2-3
Environmental conditionsCondensation: prevent with appropriate measures
Relative humidity0 - 95 % (non-condensing)
Connection typePush-in spring-cage terminal (plug-in connection), Connection design in TOP direction
ProtocolOther bus systems
Equipment heat dissipation, current-dependent Pvid0.25 W
Static heat dissipation, non-current-dependent Pvs3.045 W
Rated operational voltage160 V (terminations)
Supply voltage at DC - max30 VDC
Supply voltage at DC - min18 VDC
Air discharge8 kV
Burst impulse2 kV, Supply cable; 1 kV, Signal cable
Contact discharge4 kV
Electromagnetic fields1 V/m at 2 - 2.7 GHz (according to IEC EN 61000-4-3); 10 V/m at 0.08 - 1.0 GHz (according to IEC EN 61000-4-3); 3 V/m at 1.4 - 2 GHz (according to IEC EN 61000-4-3)
Emitted interference40 dB (at 30 - 230 MHz, Class A, radiated, high frequency); 47 dB (at 230 - 1000 MHz, Class A, radiated, high frequency)
Radiated RFI10 V
Surge rating1 kV, Signal cable, unbalanced, EMC; 0.5/0.5 kV, Supply cable, balanced/unbalanced), EMC
Voltage dipsVoltage dips: 10 ms/Voltage fluctuations: Yes
Electric connection typePlug-in connection
FeaturesFieldbus connection over separate bus coupler possible; Fieldbus connection over separate bus coupler possible
Current consumptionNone mA (typ.), for +24 V, Power supply - Input; 35 mA (typ.), for +5 V power supply (internal), Power supply - Input
Degree of protectionIP20
Mounting methodRail mounting possible
Number of channels20
Overvoltage categoryIII
Pollution degree3
Product categoryXN-322 digital input module
TypeDigital I/O module with twenty 24 V DC / 3.7 mA (EN61131-2 type 1) inputs with a 0.5 ms input filter. XN300 I/O slice module
Used withXN-312-…; XN300
Voltage typeDC
InputDigital inputs (according to EN61131-2 Type 1)
Input current3.7 mA (Digital inputs); ≤ 1.1 mA (Digital inputs, low level); ≥ 2.3 mA (Digital inputs, high level)
Input current at signal 13.7 mA
Input delay500 µs (rising edge); 500 µs (falling edge)
Input voltage24 V DC (Digital inputs); 0 - 8 V (Digital inputs, low level); 14 - 30 V (Digital inputs, high level)
Load currentNot specified by plug manufacturer
Number of inputs (digital)20
Number of outputs (digital)0
Explosion safety category for dustNone
Explosion safety category for gasNone
Potential isolationBetween Digital inputs: no
Gauge pinA1 (according to IEC/EN 60947-1)
Insulating material groupI
Stripping length (main cable)10 mm
Certified for UL hazardous location division 1No
Certified for UL hazardous location division 2No
Certified for UL hazardous location group A (acetylene)No
Certified for UL hazardous location group B (hydrogen)No
Certified for UL hazardous location group C (ethylene)No
Certified for UL hazardous location group D (propane)No
Certified for UL hazardous location group E (metal dusts)No
Certified for UL hazardous location class INo
Certified for UL hazardous location class IINo
Certified for UL hazardous location class IIINo
Supporting protocol for EtherCATNo
Supply voltage DC18–30 V
Number of digital inputs20
Digital inputs configurableNo
Digital outputs configurableNo
Permitted voltage at input0–30 V
Type of voltage (input voltage)DC
Type of digital outputNone
Type of output voltageDC
Short-circuit protection, outputs availableNo
Number of HW-interfaces other1
With optical interfaceNo
Supporting protocol for TCP/IPNo
Supporting protocol for PROFIBUSNo
Supporting protocol for CANNo
Supporting protocol for INTERBUSNo
Supporting protocol for ASINo
Supporting protocol for KNXNo
Supporting protocol for ModbusNo
Supporting protocol for Data-HighwayNo
Supporting protocol for DeviceNetNo
Supporting protocol for SUCONETNo
Supporting protocol for LONNo
Supporting protocol for PROFINET IONo
Supporting protocol for PROFINET CBANo
Supporting protocol for SERCOSNo
Supporting protocol for Foundation FieldbusNo
Supporting protocol for EtherNet/IPNo
Supporting protocol for AS-Interface Safety at WorkNo
Supporting protocol for DeviceNet SafetyNo
Supporting protocol for INTERBUS-SafetyNo
Supporting protocol for PROFIsafeNo
Supporting protocol for SafetyBUS pNo
Supporting protocol for other bus systemsYes
Radio standard BluetoothNo
Radio standard WLAN 802.11No
Radio standard GPRSNo
Radio standard GSMNo
Mobile communications standard 3G (UMTS)No
IO link masterNo
System accessoryYes
Type of electric connectionPlug-in connection
Time delay at signal change0.4–0.6 ms
Fieldbus connection over separate bus coupler possibleYes
Suitable for rail mountingYes
Wall mounting/direct mountingNo
Front built-in possibleNo
Rack-assembly possibleNo
Suitable for safety functionsNo
SIL according to IEC 61508None
Performance level according to EN ISO 13849-1None
Appendant operation agent (Ex ia)No
Country of originAustria

Properties

MOQ1

Cross-References

Attached Documents