Data Sheet for Product

PXC Compact Series for BACnet Networks
Hardware
4
Siemens Industry, Inc. 149-206
Smart Infrastructure 2020-05-20
Hardware
The PXC Compact Series consists of the following
major components:
● Input/Output Points
● Power Supply
● Controller Processor
Input/Output Points
● The PXC Compact input/output points perform
A/D or D/A conversion, signal processing, point
command output, and communication with the
controller processor. The terminal blocks are
removable for easy termination of field wiring.
● The Universal and Super Universal points
leverage TX-I/O™ Technology from Siemens
Building Technologies to configure an extensive
variety of point types.
● Universal Input (UI) and Universal Input/Output
(U) points are software-selectable to be:
– 0-10V input
– 4-20 mA input
– Digital Input
– Pulse Accumulator inputs
– 1K Ni RTD @ 32°F (Siemens, Johnson
Controls, DIN Standard)
– 1K Pt RTD (375 or 385 alpha) @ 32°F
– 10K NTC Thermistor (Type 2 and Type 3) @
77°F
– 100K NTC Thermistor (Type 2) @ 77°F
– 0-10V Analog Output (Universal Input/Output
(U) points only)
● Super Universal (X) points (PXC-24 and PXC-36
only) are software-selectable to be:
– 0-10V input
– 4-20 mA input
– Digital Input
– Pulse Accumulator inputs
– 1K Ni RTD @ 32°F (Siemens, Johnson
Controls, DIN Standard)
– 1K Pt RTD (375 or 385 alpha) @ 32°F
– 10K NTC Thermistor (Type 2 and Type 3) @
77°F
– 100K NTC Thermistor (Type 2) @ 77°F
– 0-10V Analog Output
– 4-20 mA Analog Output
– Digital Output (using external relay)
● Dedicated Digital Input (DI) points (PXC-16 only)
are dry contact status sensing.
● Digital Output (DO) points are 110/220V 4 Amp
(resistive) Form C relays; LEDs indicate the
status of each point.
● All PXC Compact Series models support 0-10
Vdc Analog Output circuits.
● On PXC-24 and PXC-36 models, the Super
Universal points may be defined as either 0-10
Vdc or 4-20 mA Analog Output circuits.
Power Supply
● The 24 volt DC power supply provides regulated
power to the input/output points and active
sensors. The power supply is internal to the PXC
Compact housing, eliminating the need for
external power supply and simplifying installation
and troubleshooting.
● The power supply works with the processor to
ensure smooth power up and power down
sequences for the equipment controlled by the I/O
points, even through brownout conditions.
Controller Processor
● The PXC Compact Series includes a
microprocessor-based multi-tasking platform for
program execution and communications with the
I/O points and with other PXC Compacts and field
panels over the ALN.
● A Human Machine Interface (HMI) port, with a
quick-connect phone jack (RJ-45), uses RS-232
protocol to support operator devices (such as a
local user interface or simple CRT terminal), and
a phone modem for dial-in service capability.
● A USB Device port supports a generic serial
interface for an HMI or Tool connection, or used
for memory expansion in select models. The USB
Device port does not support firmware flash
upgrades.
● The program and database information stored in
the PXC Compact RAM memory is battery-
backed. This eliminates the need for time-
consuming program and database re-entry in the
event of an extended power failure.
● The firmware, which includes the operating
system, is stored in non-volatile flash ROM
memory; this enables firmware upgrades in the
field.
● Brownout protection and power recovery circuitry
protect the controller board from power
fluctuations.
● LEDs provide instant visual indication of overall
operation, network communication, and low
battery warning.