Concepto
AS-Bs
AS-B is a powerful SmartStruxure server device that features both onboard I/O and built-in power supply. Like the other SmartStruxure server devices, AS-B is a Schneider Electric manufactured embedded device that generally serves as the lowest tier SmartStruxure server within the SmartStruxure solution. The SmartStruxure server device controls and supervises equipment, typically HVAC equipment. AS-B uses its onboard I/O with connected field devices, such as sensors and actuators, to do that.
AS-B is installed on DIN rails in cabinets. Power is supplied through the built-in power supply.
AS-B Models
AS-B comes in four models with different I/O point count and I/O mix.
|
Model |
I/O Points |
|
AS-B-24 |
24 |
|
AS-B-24H |
24 |
|
AS-B-36 |
36 |
|
AS-B-36H |
36 |
AS-Bs with “H” in the product name are equipped with a display for output override.
AS-Bs with 36 I/O points have the same small footprint as AS-Bs with 24 I/O points, but with 50 percent higher I/O point count.
AS-B Onboard I/O
AS-B offers a mix of I/O point types that match most types of HVAC applications. Most I/O points are highly flexible and can be configured as either inputs or outputs.
Para obtener más información, consulte AS-B Onboard I/O .
Output Override Function
The output override function allows you to manually override outputs. This function can be used for testing, commissioning, and maintenance of equipment.
Para obtener más información, consulte Output Override Function .
Built-in Power Supply
The device has a built-in power supply designed to accommodate 24 VAC or 24 VDC input power. The main AC/DC input (L/+ and N/-) is galvanically isolated from the electronics. This removes the risk of damage due to earth currents and permits the input power to be wired without concern for polarity matching.
Memory
AS-B has two types of memory:
256 MB DDR2 SDRAM (for program execution)
4 GB eMMC memory (for storage)
If a power failure occurs, all important variables are automatically saved to the eMMC memory before complete shutdown. When power returns, this data retention function ensures that AS-B can continue to run with the correct set of values.
Supported Building Standards
AS-B natively communicates with two of the most popular communication protocols:
BACnet: AS-B directly communicates to BACnet/IP and BACnet MS/TP networks, which provides access to b3 devices and BACnet devices.
Modbus: AS-B natively integrates Modbus RS-485 master and slave configurations, as well as IP client and server. This integration provides access to devices that communicate on the Modbus protocol, such as power meters, circuit breakers, and lighting controllers.
AS-B Communication Ports
AS-B has the following communication ports:
2 Ethernet 10/100 megabit ports
1 RS-485 port
1 USB host port
1 USB device port
Para obtener más información, consulte AS-B Communication Ports .
AS-B Screw Terminals
AS-B uses pluggable terminal blocks, which are easy to install and remove from the device. The terminal blocks are delivered with the device.
Para obtener más información, consulte AS-B Screw Terminals .
AS-B LEDs
There are five LEDs on the front panel of AS-B.
Para obtener más información, consulte AS-B LEDs .
Reset Functions
There are four different types of reset for the SmartStruxure server devices: warm start, cold start, reset, and reset to DFU mode. Depending on the type of reset, the SmartStruxure server device can be reset using the reset button or a command from WorkStation.
Para obtener más información, consulte Reset Functions .
Device Installation
The AS-B devices are designed for installing on DIN rails in a cabinet.
Para obtener más información, consulte AS-B Device Installation .
Wiring
The wiring recommendations provide guidance regarding wiring of the I/O modules and the SmartStruxure server devices.
Para obtener más información, consulte Wiring .
AS-B Software
Before you engineer AS-B, install the AS-B software on the server using Device Administrator. The software is not pre-loaded on AS-B.
Para obtener más información, consulte Installing AS-P or AS-B Software .
SmartStruxure Server Device Replacement Using Restore
Backup and Restore assures that SmartStruxure server devices data can be restored to a replacement SmartStruxure server device in the event of hardware failure, or to the same SmartStruxure server device in the event of data loss. As a precaution, you back up your SmartStruxure server devices regularly so that you can use the most current backup to restore the SmartStruxure server devices data to a replacement SmartStruxure server device. You also configure the new SmartStruxure server device to match the name and the network settings of the replaced SmartStruxure server device so the system can identify this SmartStruxure server device when online.
Para obtener más información, consulte SmartStruxure Server Device Replacement Using Restore .
Especificaciones
| AC input | |
Nominal voltage
|
24 VAC
|
Operating voltage range
|
+/-20 %
|
Frequency
|
50/60 Hz
|
Maximum current
|
0.5 A rms
|
Recommended transformer rating
|
≥15 VA
|
| DC input | |
Nominal voltage
|
24 to 30 VDC
|
Operating voltage range
|
21 to 33 VDC
|
Maximum power consumption
|
10 W
|
| Environment | |
Ambient temperature, operating
|
0 to 50 °C (32 to 122 °F)
|
Ambient temperature, storage
|
-20 to +70 °C (-4 to +158 °F)
|
Maximum humidity
|
95 % RH non-condensing
|
| Material | |
Plastic flame rating
|
UL94-5VB
|
Enclosure
|
PC/ABS
|
Ingress protection rating
|
IP 20
|
| Mechanical | |
Dimensions
|
198 W x 110 H x 64 D mm (7.8 W x 4.3 H x 2.5 D in.)
|
|
|
Weight, including terminal blocks
|
0.504 kg (1.111 lb)
a
|
| a) The weight includes the display and keys, which are 0.022 kg (0.049 lb). | |
Weight, excluding terminal blocks
|
0.420 kg (0.926 lb)
a
|
| a) The weight includes the display and keys, which are 0.022 kg (0.049 lb). | |
| Real-time clock | |
Accuracy in runtime mode
|
NTP server
|
Accuracy in backup mode, at 25 °C (77 °F)
|
+/-52 seconds per month
|
Backup time, at 25 °C (77 °F)
|
10 days
|
| Communication ports | |
Ethernet
|
Dual 10/100BASE-TX (RJ45)
|
USB
|
USB 2.0, 5 VDC, 2.5 W, 1 device port (mini-B) and 1 host port (type-A)
|
RS-485
|
2-wire port, bias 5.0 VDC
|
| Communications | |
BACnet
|
BACnet/IP and MS/TP, port configurable, default 47808
|
BTL B-BC (BACnet Building Controller)
a
|
|
| a) See the BTL Product Catalog for up-to-date details on BTL listed firmware revisions on BACnet International's home page. | |
Modbus
|
Modbus TCP, client and server
|
Serial, RS-485, master or slave
|
|
TCP
|
Binary, port fixed, 4444
|
HTTP
|
Non-binary, port configurable, default 80
|
HTTPS
|
Encrypted supporting TLS 1.2, 1.1, and 1.0, port configurable default 443
|
SMTP
|
Email sending, port configurable, default 25
|
SNMP
|
version 3
|
Network supervision using poll and trap
|
|
Application alarm distribution using trap
|
|
| CPU | |
Frequency
|
333 MHz
|
Type
|
SPEAr320S, ARM926 core
|
DDR2 SDRAM
|
256 MB
|
eMMC memory
|
4 GB
|
Memory backup
|
Yes, battery-free, no maintenance
|
Internal Configuration
The AS-B internal configuration with regards to the signal ground is shown in the following figure.
The earth ground terminal (
Hardware Overview
AS-B Onboard I/O
Output Override Function
AS-B Screw Terminals
AS-B Communication Ports
AS-B LEDs
Reset Functions
AS-B Device Installation
Wiring
Installing AS-P or AS-B Software
SmartStruxure Server Device Replacement Using Restore