1
INM MTL 9492-PS-PLUS Rev 2
1 FEATURES
• Isolated power supply
• Zone 2 mountable
• DIN-rail or backplane mounting
• ATEX / UKEX / IECEx approvals
• 480mA @10.0V DC - Ex ia IIB output
• 550mA @11.9V DC - Ex ib IIB output
• Power over Ethernet option (PoEx)*
• Multiple outputs achieved by ganging MTL 9492-PS-PLUS modules using 24V DC
power distribution backplane
*Note – PoEx is a simple adaptation of the IEEE 802.3af Power over Ethernet (PoE)
standard to bring the benefits to the 9400 Range of Hazardous Area devices. This
allows two spare pairs in the existing Cat5e cable to distribute the power supplied
to a 9466 Ethernet Switch (Power Sourcing Equipment – PSE) to each of the devices
connected to its five ports (PD – Powered Device). This adaptation is necessary due to
restrictions for Hazardous Area use. It is not implied that the device conforms to the
802.3af (PoE) standard.
2 DESCRIPTION
The MTL 9492-PS-PLUS Power Supply is the recommended method for supplying the MTL 9460-
ET series of intrinsically safe Ethernet modules and is based on an isolating power supply. It takes
a 24V DC safe area / Zone 2 supply and produces an intrinsically safe, 12V DC nominal output
capable of powering any one of the MTL 94xx Series Ethernet modules mounted in a Zone 1
hazardous area. The MTL 9492-PS-PLUS may be mounted in a safe area, Zone 2 hazardous area.
The output can be from either the Ex ia IIB or Ex ib IIB output connectors depending upon
application. The ‘ib’ IIB output providing a higher useable output power where the Gas Group
and Zone allows. See Figures 2.1 and 2.2 for connection details.
MTL 9492-PS-PLUS IS Power Supply
