SmartX AS-B Servers

A SmartX AS-B server is a powerful SmartX server that features both onboard I/O and built-in power supply. Like the other SmartX servers, the SmartX AS-B server is a Schneider Electric manufactured embedded device that generally serves as the lowest tier EcoStruxure BMS server within the EcoStruxure BMS. The SmartX server controls and supervises equipment, typically HVAC equipment. The SmartX AS-B server uses its onboard I/O with connected field devices, such as sensors and actuators, to do that.

SmartX AS-B Server Models

The SmartX AS-B server 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

SmartX AS-B servers with “H” in the product name are equipped with a display for output override.

SmartX AS-B servers with 36 I/O points have the same small footprint as SmartX AS-B servers with 24 I/O points.

SmartX AS-B Server Onboard I/O

The SmartX AS-B server offers a mix of I/O point types that match a wide variety of HVAC applications. Most of the I/O points are universal inputs/outputs, which are highly flexible and can be configured as either inputs or outputs.

For more information, see SmartX AS-B Server Onboard I/O .

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

A SmartX AS-B server has two types of memory:

256 MB DDR2 SDRAM (for program execution)
4 GB eMMC memory (for storage)

If a power outage occurs, all important variables are automatically saved to the eMMC memory before complete shutdown. When power returns, this data retention function helps ensure that AS-B can continue to run with the correct set of values.

Supported Building Standards

The SmartX AS-B server natively communicates with two of the most popular communication protocols:

BACnet: The SmartX AS-B server directly communicates to BACnet/IP and BACnet MS/TP networks, which provides access to MP Series controllers, b3 BACnet devices, and BACnet devices.
Modbus: The SmartX AS-B server 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.

SmartX AS-B Server Communication Ports

A SmartX AS-B server has the following communication ports:

2 Ethernet 10/100 megabit ports
1 RS-485 port
1 USB host port
1 USB device port

For more information, see SmartX AS-B Server Communication Ports .

SmartX Server Replacement Using Restore

Backup and Restore helps assure that SmartX server data can be restored to a replacement SmartX server in the event of detected failure, or to the same SmartX server in the event of data loss. As a precaution, you back up your SmartX servers regularly so that you can use the most current backup to restore the SmartX server data to a replacement SmartX server. You also configure the new SmartX server to match the name and the network settings of the replaced SmartX server so the system can identify this SmartX server when online.

For more information, see SmartX Server Replacement Using Restore .

Specifications

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.)
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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	1 USB 2.0 device port (mini-B)
	1 USB 2.0 host port (type-A), 5 VDC, 2.5 W
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, client and server
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
SMTPS	Email sending, port configurable, default 587
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 SmartX AS-B servers internal configuration with regards to the signal ground is shown in the following figure.

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Figure: SmartX AS-B server internal configuration

The earth ground terminal (

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) of the built-in power supply is connected to signal ground, which is the same as the negative output from the power supply. The purpose of this connection is to comply with EMC directives.

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