Siemens PXC Modular Series User Manual

Hardware Features
Compact Series Specifications
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100
Siemens Industry, Inc.
Technical Reference Manual
145-172
Building Technologies
Restricted
2018-09-25
Processor, Battery, and Memory
Processor and Clock Speed PXC-16 and PXC-24: Freescale MPC852T, 100 MHz
PXC-36: Freescale MPC885, 133 MHz
Memory PXC-16 and PXC-24: 24 MB (16 MB SDRAM, 8 MB Flash ROM)
PXC-16/24 “F” and “F32”: 40 MB (32 MB SDRAM, 8 MB Flash ROM)
PXC-36: 80 MB (64 MB SDRAM, 16 MB Flash ROM)
NOTE:
See the Configuration and Sizing Guidelines document for supported memory size.
New PXC models will now support high speed 480 Mbps communication (PXC-36 only).
Serial EEPROM 4 KB
Battery backup of Synchronous Dynamic
(SD) RAM (field replaceable)
Non-
rooftop Models
AA (LR6) 1.5 Volt Alkaline (non-rechargeable)
PXC-16 and PXC-24: 180 days (accumulated)
PXC-16 and PXC-24 F and F32: 110 days (accumulated)
PXC-36: 60 days (accumulated)
Rooftop (Extended
Temperature) Models
AA (LR6) 3.6 Volt Lithium (non-rechargeable): 90 days (accumulated)
32MB SDRAM Rooftop (lithium): 200 days
16MB SDRAM Rooftop (lithium): 330 days
Battery backup of Real Time Clock
Non-
rooftop Models
10 years (32°F to 122°F (0°C to 50°C))
Coin cell (BR2032) 3 Volt lithium
Rooftop (Extended Temperature) Models
18 months (-40°F to 158°F (-40°C to 70°C))
Coin cell (BR2032) 3 Volt lithium
These are typical accumulated times while power is off.
Communication
BACnet/IP or Ethernet TCP/IP (P2)
Automation Level Network (ALN) or
BACnet/IP or Ethernet TCP/IP (P2) Floor
Level Network (FLN)
10Base-T or 100Base-TX compliant
10 Mbps or 100 Mbps (autoswitching) over Ethernet cable, RJ-45 jack, shielded, 328 ft (100
m) max. from the field panel to the nearest active hub, router, or signal repeater. Up to 100
nodes per BACnet/IP or Ethernet TCP/IP (P2) ALN or FLN.
10Base-
T Connection Requirements
UTP/STP Category 3 or 5 or better cable
100Base-TX Connection Require
ments
UTP/STP Category 5 or better cable
Supports CSMA/CD protocol, compatible with IEEE 802.xx compliant devices.
PXC-36 supports Auto-MDIX
BACnet MS/TP Automation Level Network
(ALN)
9600 bps to 115.2 Kbps, up to 10 nodes per MS/TP ALN
RS-485 Automation Level Network (ALN)
1200 bps to 115.2 Kbps over 24-gauge, low capacitance shielded twisted pair cable, 4000 ft
(1220 m) max. @ 57.6 Kbps or less, 3280 ft (1 km) max. @ 115.2 Kbps. Up to 100 nodes per
RS-485 ALN.
Human-Machine Interface (HMI)
Three wire, full-duplex, asynchronous serial RS-232 compliant, 1200 bps to 115.2 Kbps, 8-N-
1, no hardware flow control (Xon/Xoff supported). RJ-45 jack, 50 ft (16 m) max. cable length.
Supports dial-in modem.
Factory-
set HMI Communication Speed
PXC-16 and PXC-24: 9600 bps
PXC-36: 115.2 Kbps

Siemens PXC Modular Series Specifications

General

Brand	Siemens
Model	PXC Modular Series
Category	Control Unit
Language	English