2
INM MTL 9492-PS-PLUS Rev 2
Each MTL 9492-PS-PLUS can power a single MTL 946x-ET Ethernet module.
It is not permitted to connect to both ia and ib outputs on the same MTL 9492-PS-PLUS module .
If multiple outputs are required for several Ethernet modules, there is a power distribution
backplane available to simplify the 24VDC input connection to the modules, or alternatively a
number of them can be DIN-rail mounted with a convenient “Powerbus” input.
The MTL 9492-PS-PLUS module has LED power indication for both input and output (see Figure
2.3) along with internal current limiting and electronic auto-reset circuit breaker action to protect
the module in the event of its output being short circuited or overloaded. This also minimises
the power dissipation during the fault to a negligible level, thus improving reliability.
Hazardous area
Safe
are
a
Figure 2 .1
Zone 0
Ex ia IIB
application
Hazardous area
Safe
are
a
Figure 2 .2
Zone 1
Ex ib IIB
application
9492-PS-PLUS 12VDC
POWER SUPPLY
Figure 2 .3
MTL 9492-PS-PLUS
top label and
LED indicators
Zone 0
Zone 1
Table 2 .1
DIN-rail
mounting
connections
Table 2 .2
Backplane
mounting
connnections
Terminal
Function
1
2
3
4
5
6
13
14
Ex ia IIB ve
n.c.
Ex ia IIB output –ve
n.c.
Ex ib IIB ve
Ex ib IIB Output –ve
Supply –ve (Vs–)
ve (Vs+)
Terminal
Function
1
2
3
4
5
6
7, 8 & 9
10, 11 & 12
Ex ia IIB ve
n.c.
Ex ia IIB output –ve
n.c.
Ex ib IIB ve
Ex ib IIB Output –ve
Supply –ve (Vs–)
ve (Vs+)