Siemens Desigo PXC100.D is a modular Building Automation Controller and DDC Controller within the Desigo PXC automation station family.It manages up to 200 data points with native BACnet/IP and BACnet/LonTalk communication,integrating HVAC,lighting,and energy systems.With a 133 MHz PowerPC processor and 80 MB total memory,it delivers freely programmable DDC control for primary plant applications in small to medium-sized commercial and institutional buildings.
What Is a Building Automation Controller?
A Building Automation Controller(also called a Direct Digital Controller or DDC Controller)is a programmable digital device that monitors and controls mechanical and electrical building services,including heating,ventilation,air conditioning,lighting,and energy management systems.DDC controllers execute closed-loop control algorithms based on sensor inputs and send actuation commands to field devices such as valves,dampers,relays,and variable frequency drives.
DDC controllers are classified by communication protocol—BACnet,LonTalk,and Modbus being the dominant open standards—and by architecture:compact fixed-I/O units versus modular expandable stations.The PXC100.D is a modular,BACnet Building Controller(B-BC profile)that bridges BACnet/IP Ethernet and BACnet/LonTalk field-level networks within the Desigo building automation ecosystem.It can operate standalone or networked within a multi-controller topology,without dependency on a higher-level head-end processor.
Key Specifications
Processor:MPC885(PowerPC)at 133 MHz clock speed
Total Memory:80 MB(64 MB SDRAM,16 MB Flash ROM)
Maximum Data Points:200 physical data points
Communication Protocols:BACnet/IP(10/100 Mbit/s,2-port Ethernet switch),BACnet/LonTalk
BACnet Profile:B-BC(BACnet Building Controller),BTL tested per BACnet standard Rev.1.12
AMEV Profile:AS-A and AS-B per guideline"BACnet 2011-Version 1.2"
LonTalk Bus Rate:78 kbps
Onboard I/O Points:16(8 Universal Inputs,4 Digital Inputs,4 Analog Outputs)
I/O Expansion:TX-I/O modules,TX Open modules,PTM-I/O legacy modules,LonMark-compatible devices
Operating Voltage:AC 24 V,50/60 Hz
Voltage Tolerance:±20%(19.2 to 28.8 VAC)
Maximum Power Consumption:24 VA
Power Consumption(Typical):12 VA/6–8 W
Real-Time Clock Accuracy:±30 seconds per month(initial)
Battery–Real-Time Clock:Type CR2032(several days retention after low-battery event)
Battery–Trend Data/Runtime Parameters:Type AA Lithium(approx.15 hours retention);Alkaline(several days)
Low-Voltage Protection:Start-up management to protect against supply voltage fluctuation
Operating Temperature Range:0°C to 50°C(per industrial DDC controller norms for panel-mounted environments)
Storage Temperature Range:-20°C to 70°C
Humidity:5%to 95%RH,non-condensing(per DIN-compliant panel assembly design)
Degree of Protection:IP20(as per EN 60529)
Mounting:35 mm DIN Rail per IEC 60715,with removable terminal blocks
Dimensions(L×W×D):192 mm×90 mm×70 mm
Weight:0.41 kg(net)
Programming Language:D-MAP graphical programming(close resemblance to CEN standard 11312)
Engineering Tool:Desigo Xworks Plus
Web Server:Integrated for generic network-based operation
Certifications:CE,cULus,BTL(BACnet Testing Laboratories),Lloyd‘s Register,NK(Nippon Kaiji Kyokai)
Compatible Systems:Desigo CC,APOGEE Automation System
Technical Highlights
A dual-stack BACnet communication architecture eliminates the need for external protocol gateways.The PXC100.D supports simultaneous communication on BACnet/IP(via an integrated 2-port 10/100 Mbit/s Ethernet switch)and BACnet/LonTalk(78 kbps).This design enables field-level LonTalk integration of LonMark-compatible sensors and actuators while maintaining IP-based backbone connectivity to the Desigo CC building management platform,reducing hardware count and wiring complexity in distributed control topologies.
Freely programmable D-MAP environment supports custom control logic without vendor lock-in.The D-MAP graphical programming language,closely aligned with CEN standard 11312,provides libraries of pre-defined function blocks—including PID loops,schedulers,alarm routing,and trend functions—that engineers connect visually within the Desigo Xworks Plus engineering tool.This eliminates proprietary coding requirements and enables system integrators to tailor HVAC sequences,energy optimization routines,and lighting schedules to specific building performance targets.
Modular I/O architecture provides precise hardware-to-application matching and future scalability.The 16 onboard I/O points(8 UI,4 DI,4 AO)handle immediate field device termination.For larger applications,TX-I/O expansion modules connect via the P-bus,supporting any mix of signal types—analog,digital,temperature,pressure,metering—without changing the base controller.TX Open modules enable integration of third-party devices such as variable frequency drives,pumps,and energy meters directly onto the I/O bus.
Built-in energy management and alarm functions reduce external software dependency.The controller includes pre-integrated management capabilities:alarm management with safe-transfer tracking and automatic alarm transmission monitoring;time scheduling with automatic daylight saving time adjustment;trend data logging with battery-backed retention;and remote management via PXA40 option modules using a standard web browser.
Legacy system migration is supported through PTM-I/O module connectivity.For retrofit projects,existing PTM-I/O field wiring can be retained and connected directly to the PXC100.D,preserving investment in existing sensor and actuator infrastructure while upgrading the control platform to BACnet-native architecture.This answers a common retrofit question:"Can I reuse my existing I/O modules when upgrading to PXC100.D?"The answer is yes,provided the modules are PTM-I/O compatible.
Applications
Primary HVAC plant control:Executes closed-loop sequences for chillers,boilers,air handling units(AHUs),cooling towers,and heat exchangers.The 133 MHz processor handles up to 200 data points with deterministic scan cycles suitable for critical temperature and pressure control loops in commercial office towers and hospital wings.
Central plant energy optimization:Runs demand-based staging algorithms across multiple chillers or boilers using integrated trend logging and scheduling functions.Typical installations achieve measurable HVAC energy reduction through adaptive control algorithms that automatically compensate for seasonal load variations when used with firmware version 2.8.18 or later.
Room-level automation integration:Connects to RXC room controllers and LonWorks devices via the PXX-L11/12 interface modules,extending control to VAV boxes,fan coil units,radiant panel valves,and zone dampers.This enables coordinated floor-level HVAC management from a single automation station.
Lighting and shading control:Manages schedules and sensor-based switching for lighting zones and motorized blind actuators.The BACnet scheduler function supports calendar-based and astronomical-time-based events,enabling automated daylight harvesting and occupancy-responsive lighting strategies.
Third-party system integration:Interfaces with variable speed drives,energy meters,pumps,and other non-Siemens devices through TX Open modules,consolidating diverse building services onto a unified BACnet backbone without intermediary gateways.
Building retrofit and legacy migration projects:Replaces obsolete APOGEE field panels or third-party DDC controllers while reusing existing PTM-I/O field wiring.The DIN rail form factor and removable terminal blocks reduce panel rework time compared to fixed-backplane alternatives.
Selection Guidance
Suitable applications:
Small to medium-sized commercial buildings,schools,hospitals,and institutional facilities requiring a scalable DDC controller that supports 50–200 data points
Projects requiring native BACnet/IP communication with BTL certification and B-BC profile compliance for multi-vendor interoperability
Control panels with standard 35 mm DIN Rail mounting and 192 mm×90 mm×70 mm enclosure space allocation
Applications needing simultaneous BACnet/IP and LonTalk fieldbus communication without external routers
Retrofit projects where legacy PTM-I/O or LonMark field devices must be retained and integrated
Not recommended for:
Large campus or high-rise applications exceeding 200 physical data points.Select the PXC200.D(supports higher data point counts)or deploy multiple networked PXC100.D units within a Desigo system network.
BACnet/IP-only applications where LonTalk functionality is not required.The PXC100-E.D offers a cost-optimized BACnet/IP-only alternative with identical programming and I/O capabilities,eliminating the LonTalk interface hardware.
Environments with ambient temperatures below 0°C or above 50°C outside the control panel.Specify a controller rated for extended temperature range,or provide panel-level environmental conditioning(enclosure heater or cooling fan)to maintain the operating range.
FAQ
1.What are the dimensions,weight,and mounting requirements of the PXC100.D?
The unit measures 192 mm L×90 mm W×70 mm D and weighs 0.41 kg net.It mounts on standard 35 mm DIN Rail per IEC 60715;installation requires no tools—snap the module onto the rail and lock it into position.
2.What communication protocols does the PXC100.D support for building automation?
The controller supports BACnet/IP(10/100 Mbit/s,2-port Ethernet switch),BACnet/LonTalk(78 kbps),and peer-to-peer communication over BACnet.It is BTL tested and certified with the B-BC(BACnet Building Controller)profile per BACnet standard Rev.1.12.
3.What is the delivery time or lead time for the Siemens PXC100.D?
Authorized distribution partners with local stock ship within 3 to 5 business days.Factory lead time is 3 to 4 weeks for standard orders.Inventory levels vary by region;confirm current stock at time of inquiry.
4.How many data points and I/O channels does the PXC100.D manage?
The controller handles up to 200 physical data points.Onboard I/O includes 16 points:8 Universal Inputs,4 Digital Inputs,and 4 Analog Outputs.Additional I/O points are added via TX-I/O expansion modules,TX Open modules for third-party device integration,or PTM-I/O modules for legacy system migration.
5.How much does the PXC100.D cost?What is the typical price range?
The PXC100.D typically ranges from2,800to4,200 USD per unit depending on configuration,volume,and regional distribution.Prices fluctuate due to exchange rates,tariffs,and factory adjustments.For an accurate quotation reflecting current pricing and shipping,contact Beijing Zhongping Technology directly.
6.Is the PXC100.D compatible with third-party BAS software and BACnet networks?
Yes.The PXC100.D carries BTL certification with the B-BC profile and supports AMEV profiles AS-A and AS-B,ensuring interoperability with third-party BACnet-compliant building automation front-ends,operator workstations,and engineering tools from any vendor.
7.What are the payment terms and warranty for purchasing the PXC100.D?
We offer a 12-month standard warranty against manufacturing defects.Payment is accepted via bank wire transfer(T/T).For qualified accounts,Beijing Zhongping Technology provides net 30 payment terms upon credit approval.Extended warranty options are available for an additional fee.
8.What is the return policy and RMA process for the PXC100.D?
Returns require prior authorization.Beijing Zhongping Technology processes return merchandise authorization(RMA)requests within 2 business days.The product must be returned in original packaging with all accessories.Shipping and handling charges are non-refundable;restocking fees may apply for non-defective returns.
9.What are the shipping,customs,and import tariff details for international PXC100.D orders?
International shipments dispatch from Shanghai,China via FedEx,DHL,or UPS express service under Incoterms CPT(Carriage Paid To).Duties,customs fees,and applicable VAT or consumption tax are payable by the buyer upon import clearance.Beijing Zhongping Technology provides commercial invoices,packing lists,and certificates of origin required for customs processing on all export orders.
10.How do I replace the PXC100.D if it becomes obsolete or discontinued?
The PXC100.D is an active product in the Siemens Desigo portfolio with no scheduled discontinuation.For system upgrades,the PXC100-E.D provides a BACnet/IP-only migration path with identical D-MAP programmability and TX-I/O compatibility.For larger applications,the PXC200.D scales to higher data point counts.Beijing Zhongping Technology provides cross-reference and migration consultation for any system transition requirements.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a one-stop integrated service provider of intelligent manufacturing, belongs to the Gong Doctor Group, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1). Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3). At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
+86 010-64225983
+8613811814778
info@zhongpingtech.com
Building 26, Liyuan Community, Chaoyang District, Beijing, China
