Data Sheet for Product

Page 2 of 4
Siemens Building Technologies, Inc.
Accessories
Service Boxes
Description
PXA series service boxes include all of the parts
necessary for installation inside a 19 inch or 34 inch
PX Series Enclosure Assemblies. The 192VA service
box can also be used within existing MEC enclosures.
The 384VA service box may only be installed in the
34 inch PX Series Enclosure.
Figure 3. SB115V384VA service box .
Features
Four service boxes are available to step-down
line voltage to 24Vac for use by electronic
components.
Service boxes are sized for:
 115V to 24V at 192VA
 115V to 24V at 384VA
 230V to 24V at 192VA
 230V to 24V at 384VA
384VA models mount inside the 34” enclosures.
192VA models mount inside the 19” and 34”
enclosures.
Two sidewall kits cover exposed circuits for use in
other NEMA Type 1 enclosures such as motor
control cabinets.
Each service box includes an on/off circuit
breaker for the transformer, transient protection
on both primary and secondary sides, two NEC
Class 1 power limited terminations for
components inside the enclosure and one NEC
Class 2 termination for external components such
as TX-I/O Bus expansion or actuators.
The 115V models provide an un-switched duplex
outlet to power peripheral devices such as
modems, trunk interfaces and Portable Operator’s
Terminals.
UL864 Smoke Control rated when used in PXA
Series Enclosure 19” or 34” or within existing
MEC enclosures.
DIN Replacement Kit (PXA-DIN16KIT)
The DIN Replacement Kit can be used when
additional 16” DIN rail is required.
This kit contains:
Four 16” (406 mm) DIN rails for use when extra
rails are needed
Twelve Screws
Wire Tie Bar Kit (PXA-TIEBARKIT)
The Wire Tie Bar kit can be used when addition tie
bars are needed to secure wiring within the enclosure.
This kit contains:
Four 4.5” (114 mm) tie bars
Four 9.5” (241 mm) tie bars
Screws and cable ties
USB Modem Kit (PXA-USBMODEMKIT)
USB Modem kit contains everything needed for dial
up modem connection using the USB Host port of the
PXC Modular controller.
This kit contains:
Sportsters Modem 56k BPS Dialup
USB to RS232 Adapter
Surge Suppressor Analog Telephone Line
DB25M/F Right-Angle Adapter
IBM 6’ PC Cable DB9F to DB25M
USB to RS232 Adapter (PXA-USBADAPTER)
USB to RS232 Adapter converts USB Host signals
(Type A male connector) to RS232 signals (DB9 male
connector).
This adapter may be used for connection to a RS232
printer. It is part of the PXA-USBMODEMKIT.