Concept
AS-P Installation
The AS-P (AS-P-SMK) uses the model TB-ASP-W1 for mounting. To install the AS-P on the terminal base, follow these instructions:
Position the AS-P (AS-P-SMK) directly to the right of the first (leftmost) PS-24V power supply module on the series I/O bus structure
Slide the TB-ASP-W1 terminal base to the left in the DIN rail and mate it together with the TB-PS-W1 power supply terminal base
Connect the various I/O modules to the right side of the TB-ASP-W1 base
AS-Ps (AS-P-SMK) have three communication ports which must be configured for use with the smoke control system. In a smoke control system, the Ethernet port is the primary communications channel connecting through the EIS Series switches (hubs) to the other AS-Ps in the system, the BACnet/IP port of the Fire Alarm Panel (FAP), and the host Workstation(s) for configuration and supplemental system monitoring.
The AS-P (AS-P-SMK) also provides two RS-485 communication ports. In a smoke control system, these two ports are used to communicate with the b3 or MNB series controllers or the FSCS panel. Typically, only a single FSCS panel is configured in the system and one of the AS-Ps is assigned the function of managing the FSCS panel and configuring COM-A or COM-B for the Modbus protocol for the FSCS.
The AS-P (AS-P-SMK) includes 12 terminals (#1 to #12) along the top of the terminal base. Two separate plug-in terminal blocks are provided on the top of the AS-P to permit you to easily disconnect and connect the two RS-485 channels (A and B).
Terminals 3 and 4 provide 5 V power for RS-485 biasing, while terminals 1 and 2 and 5 and 6 provide RS-485 communications.
Terminals 8 and 9 provide RS-485 communications for connecting to a twisted pair network with LON controllers. You use terminal 10 for connecting the cable shield . Finally, terminals 11 and 12 allow the connection of the FTT-10 Free Topology Transceiver LON network. In the SmartStruxure smoke control system, the LON networks and controllers are available only for HVAC comfort controls and must not be applied to any portion of the smoke control system.
All terminations on the AS-P are associated with serial data communications. All circuits are Power-Limited.
You connect the RS-485 twisted pair bus from the b3 or MNB controllers to the terminals on the three-position and four-position terminal blocks that plug into the receptacles on the top of the unit on the AS-P. These terminals are numbered 1 through 7. For the COM-A RS-485 bus, you connect the MS/TP TX/RX+ and TX/RX- signal wires to terminals 1 and 2 respectively. You connect the cable shield to terminal 3. For the second RS-485 bus (COM-B), you connect the MS/TP TX/RX+ and TX/RX- signal wires to terminals 5 and 6 respectively, and the cable shield to terminal 7. Terminal 4 supplies a 5.0V output which you can use for the RS-485 network bias when required.
The direct connected RS-485 bus cable can be up to 4000 feet in length. You must connect the bus in a direct daisy chain fashion (cable running from one node to the next) with no cable stub connections directly to the main bus. You can connect an RS-485 repeater to extend the length or accommodate stub connections.
See the discussion on repeaters. For more information, see Network Accessories .
See also the section on cable routing and cable type recommendations. For more information, see MS/TP Cable Routing .
The RS-485 port serving the b3 and MNB controllers is configured for the following:
BACnet MS/TP protocol
Data Rate: 9600 to 76,800 BPS
Format: 8 Data bits, No Parity, 1 Stop bit
The MS/TP communications path is supervised from the AS-P (AS-P-SMK). The AS-P application program must be configured to monitor the integrity of communications to the b3 and MNB controllers and continuously report the status of the network connection to all smoke control system controllers. This status information is continuously collected by the AS-P (AS-P-SMK) operating as the FSCS manager and the AS-P program must indicate a System Comms Fault on the FSCS panel if a loss of communications occurs with any smoke controllers.
The RS-485 ports used to provide MS/TP bus connections to the smoke control system b3 and MNB series controllers must be isolated from connections to other devices that are not part of the UL 864 listing.
You cannot mix other RS-485 MS/TP products with direct connection on the same MS/TP bus segment. This excludes other Schneider Electric controllers not listed in this guide. For more information, see MS/TP BACnet Controllers .
You can connect other non-UL 864 MS/TP products in two ways.
1) You can select an MS/TP port from an AS-P (AS-P-SMK) to handle non-Listed controller products not partipating in the smoke control system. The AS-P provides the isolation from non-listed products. You must not connect MNB and b3 controllers partipating in the smoke control system to the bus serving the non-listed products.
2) You may connect an MS/TP Repeater on an MS/TP bus serving smoke control applications. You can use a far-side branch port from the repeater to connect non-listed product(s) to the AS-P (AS-P-SMK). The AS-P must not include the non-listed controller in the smoke control applications. The non-listed controller will be part of other building automation and comfort control systems. The repeater requirements are discussed in the sections that follow.
You can configure either of the two COM-A and COM-B ports for the Modbus protocol and use them for communications with the FSCS panel. The Modbus interface uses the same RS-485 interface. For the COM-A RS-485 bus, you connect the Modbus TX/RX+ and TX/RX- signal wires to terminals 1 and 2 respectively. You connect the cable shield to terminal 3 .
For the second RS-485 bus (COM-B), the Modbus TX/RX+ and TX/RX- signal wires connect to terminals 5 and 6 respectively, and the cable shield connects to terminal 7. Terminal 4 supplies a 5.0 V output which you can use for RS-485 network bias when required.
The RS-485 port serving the FSCS is configured for the following:
Modbus protocol
Mode: Modbus Slave
Data Rate: 9600 or 19,200 BPS
Format: 8 Data bits, No Parity, 1 Stop bit
The FSCS communications cable is supervised from the FSCS panel. A break in that connection will be indicated on the FSCS panel by the FSCS COMM FAULT visual indicator and the audible horn. For more information, see FSCS Basics .
The AS-P (AS-P-SMK) can be configured with both MS/TP on one channel and Modbus on the other channel independently.
When using either the COM-A or COM-B port, connect one of the shield terminals (3 or 7) to the signals or earth ground rail in the enclosure using 16 AWG wire or larger.
The direct connected RS-485 bus cable can be up to 4000 feet in length. There is no repeater approved for use in the smoke control system with the Modbus protocol. Since it is only a one to one connection, and it will typically involve a relatively short connection from the AS-P (AS-P-SMK) to the FSCS, a repeater is not needed. The Modbus protocol may be used on other AS-Ps handling applications such as HVAC comfort control and electrical metering.
The RS-485 Modbus port selected for the FSCS management must not be connected to any other Modbus devices. The only Modbus device defined for use in the smoke control system is the FSCS panel.
You can use any of the CAT-5 or CAT-6 Ethernet cables with RJ-45 modular connectors to connect with the Ethernet port located along the bottom of the AS-P. The standard cable distance limit on the 10/100 BASE-T connection is 100 meters.
This cable connection must be from the AS-P (AS-P-SMK) to one of the EIS series UL 864 approved Ethernet Switch/Hub units listed in this guide. For more information, see Network Accessories .
The other 10/100 BASE-T ports on the EIS hub can extend for the standard 100 meter length when connecting to other EIS hubs, or to the BACnet/IP interface of the Fire Alarm Panel. The fiber optic versions of the EIS hubs are recommended to support extended cable distances and provide robust Ethernet communications with immunity for EMC in the environment.
The single USB host port on the AS-P (adjacent to the Ethernet port) provide the standard USB 2.0 Type-A port connection. They are used to supply optional memory and/or communications interface options. These options are not used within the SmartStruxure smoke control system application.
The AS-P (AS-P-SMK) provides a USB device port on the face of the unit below the RS-485 LEDs. This is a standard USB 2.0 Type-B port connection. This port is used for connection through a USB cable (up to 3 meters in length) to a maintenance/diagnostic PC for commissioning functions such as installation of firmware when the Ethernet connection is not usable. The USB device port is not used within the SmartStruxure smoke control system application.
SmartStruxure Module Installation
Terminal Base Installation
Power Rating
Terminal Base Wiring
Electronics Module Installation
PS-24V Power Supply Module
Automation Server Installation
MS/TP Cable Routing
Module Status LEDs
I/O Module Installation