Description
The 9491-PS-PLUS is designed for compact DIN-rail installation and incorporates input-to-output isolation, input protection, and optional Power over Ethernet (PoE) functionality for compatible industrial Ethernet applications.
9491-PS-PLUS MTL Key Features
Intrinsically safe isolated power supply
24 V DC input
Nominal 12 V DC intrinsically safe output
Ex ia / Ex ib operation for hazardous-area instrumentation
Suitable for Zone 0, Zone 1 and Zone 2 applications, subject to certification requirements
Gas Group IIB capability
DIN-rail mounting
Input-to-output electrical isolation
Fuse and supply-reversal diode protection
Power-over-Ethernet option
Compact 15.8 mm wide housing
ATEX and IECEx certified
Operating temperature from -40 °C to +70 °C according to the applicable product/certification configuration
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9491-PS-PLUS
9491-PS-PLUS MTL Technical Specifications
Parameter Specification
Manufacturer Eaton / MTL (Crouse-Hinds series)
Model 9491-PS-PLUS
Product Type Intrinsically Safe Power Supply
Input Voltage 24 V DC
Input Current 350 mA
Nominal Output 12 V DC
Listed Output Voltage 12.1 V DC
Intrinsic Safety Ex ia / Ex ib
Gas Group IIB
Maximum Ex ib Output Current Up to 400 mA
Ex ia Output Up to 200 mA, depending on installation/certification parameters
Isolation Input-to-output isolation
Isolation Rating Um = 253 V rms
Input Protection Fuse + supply-reversal diode
Mounting DIN rail
Connection Screw terminals
Maximum Conductor Size 2.5 mm² stranded or single-core
Industrial Ethernet Function Power over Ethernet option
Operating Temperature -40 °C to +70 °C*
Relative Humidity 5–95% RH, non-condensing
Width 15.8 mm
Height 121.8 mm
Depth 109.8 mm
Weight Approx. 130 g
Certifications ATEX / IECEx; NEC/CEC approvals according to applicable configuration
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9491-PS-PLUS
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