Emerson PACSystems ™ Ethernet Switch SLM082



Emerson PACSystems ™  Ethernet Switch SLM082 

Product Core Overview 

（1） Product positioning

SLM082 is a powerful management industrial switch suitable for harsh industrial environments such as wide temperature, high dust, and humidity. It supports web, console (CLI), third-party SNMP software, and exclusive "PACSystems Ethernet Switch Configuration Tool" for management, and can configure multiple switches simultaneously and monitor their status.

（2） Software core functions

Specific description of functional categories

Network redundancy supports the world's fastest redundant Ethernet ring (with a recovery time of less than 10ms when 250 devices are cascaded), enabling ring coupling and dual home topology; Compatible with RSTP (802.1w) Fast Spanning Tree Protocol

Network management supports the SNMP v1/v2/v3 protocol; Support VLAN partitioning based on port/802.1Q standards; Support LLDP (Link Layer Discovery Protocol) to automatically discover network node information

Event notifications can generate event alerts through email (SMTP), SNMP Trap, and relay output

Traffic control supports 802.1p Quality of Service (QoS) to ensure real-time traffic; Support IGMP Snooping multicast filtering to reduce network bandwidth usage

Security protection supports port enable/disable, MAC address based port security, 802.1x port authentication, and Radius centralized password management; SNPv3 encryption authentication

（3） Hardware core features

Power supply: Three redundant DC inputs.

Environmental adaptability: working temperature -40~70 ℃, storage temperature -40~85 ℃, working humidity 5%~95% (no condensation), protection level IP30.

Port configuration: 8 10/100Base-T (X) Ethernet ports (RJ45 interface), 2 100/1000Base-X SFP optical ports, and 1 Console port.

Physical dimensions: 52mm (width) x 106mm (depth) x 144mm (height).

Hardware Installation

SLM082 supports two installation methods to meet the needs of different industrial scenarios:

（1） DIN rail installation

The switch backplane comes with a DIN rail kit, which can be directly fastened to the standard DIN rail for fixation. The installation steps are simple and do not require additional drilling.

（2） Wall mounted installation

The packaging contains a wall mounted panel, which needs to be punched on the wall according to the dimensions indicated in the manual (such as aperture, hole spacing, etc.). After fixing the wall mounted panel with screws, the switch can be installed.

Hardware interface and indicator lights

（1） Front panel interface (Table 3.1)

Interface Type Quantity Function Description

10/100Base-T (X) ports with 8 RJ45 interfaces, supporting automatic negotiation (rate/duplex mode), default rate "automatic", duplex "automatic", flow control "disabled"

100/1000Base-X SFP ports with 2 optical ports, used to connect fiber optic modules and support high-speed data transmission

Console port with one RJ45 interface, connected to the computer via an RS-232 adapter cable for CLI management

Press the Reset button for 5 seconds to restore the switch to factory settings

（2） Meaning of front panel indicator lights (Table 3.2)

LED identification color status description

The green constant light of PW1/PW2/PW3 corresponds to the activated power supply module (PW1/PW2) or power interface (PW3)

R. The M (Ring Master) green constant light switch is the master node (Ring Master) of the redundant ring

The redundant ring with green constant brightness has been enabled;

Slow flashing: Redundant ring topology abnormality;

Flash: Redundant ring is working normally

Fault: The yellow light is constantly on, indicating a power failure or port interruption/malfunction

10/100Base-T (X) port LNK/ACT green constant light: port link established;

Flashing: The port is transmitting data and the link and activity status of the corresponding Ethernet port

10/100Base-T (X) port Full Duplex yellow constant light port works in full duplex mode

SFP port LNK/ACT green/yellow constant light: optical port link established;

Blinking: The optical port is transmitting data, and the corresponding link and activity status of the optical port are flashing

（3） Top panel component

Terminal block: includes PW1/PW2 (12-48V DC power input) and relay output interfaces（ 1A@24VDC ）.

Power interface (PW3): 12-45V DC power input socket.

Reset button: Press for 3 seconds to reset the device, press for 5 seconds to restore factory settings.

Console port: RJ45 interface, used for CLI management connection.

Cable Configuration

（1） Ethernet cable

Applicable standards: 10BASE-T supports Category 3/4/5 unshielded twisted pair (UTP), while 100BASE-TX requires Category 5 UTP.

Maximum transmission distance: Both are 100m (328 feet), with RJ45 connectors.

Pin definition: In 100BASE-TX/10BASE-T cables, pins 1/2 are used for sending data and pins 3/6 are used for receiving data; Supports automatic MDI/MDI-X functionality, allowing for direct connection between computers and switches (without the need for crossovers).

（2） SFP optical module and fiber optic

Optical module type: Supports multi-mode (transmission distance 0-550m, wavelength 850nm, fiber specifications 50/125 μ m or 62.5/125 μ m) and single-mode SFP modules, with LC connectors.

Connection rule: The TX port of switch A needs to be connected to the RX port of switch B to ensure the correct transmission of optical signals.

（3） Console cable

Cable specifications: The package contains a DB-9 (female) to RJ45 cable, which is used to connect the computer COM port to the switch Console port.

Pin correspondence: Pin 2 (RD, receive data) of the computer end (DB-9 male head) corresponds to Pin 2 (TD, send data) of the DB-9 female head, Pin 3 (TD, send data) corresponds to Pin 3 (RD, receive data) of the female head, and Pin 5 (GD, ground) corresponds to Pin 5 (GD, ground) of the female head.

Web Management Configuration 

Web management is based on the built-in HTML web pages (Flash storage) of the switch, supporting IE5.0 and above browsers (with Java Applets network port permissions enabled), and compatible with both HTTP and HTTPS modes.

（1） Login preparation and default parameters

Default parameters: IP address 192.168.0.100, subnet mask 255.255.255.0, default gateway 192.168.0.254, username/password "admin".

Login steps: Open the browser and enter "http:///device IP" or "https://device IP". Enter the username and password to enter the management interface.

（2） Core configuration function

1. Basic Settings (5.1.5)

Switch information: System name (maximum 64 bytes), physical location, contacts, firmware version (default 1.03), kernel version (default v2.49), device MAC address, etc. can be modified.

Administrator password: Old username/password verification is required, and the new password must be at least 8 characters long, containing 1 uppercase letter, 1 number, and 1 special character (such as @ # $).

IP configuration: You can manually set IP/subnet mask/gateway/DNS, or enable DHCP clients to automatically obtain IP (if there is a DHCP server in the network).

SNTP time synchronization: After enabling the SNTP client, you can set the time zone (such as GMT Greenwich Mean Time), SNTP server IP, and support daylight saving time configuration (setting start and end times and offsets).

2. Backup and Upgrade (5.1.6)

Configure backup/restore: Back up the current configuration file (such as data.bin) through the TFTP server, or restore the configuration from the TFTP server.

Firmware upgrade: Prepare a TFTP server and store firmware files (such as image. bin). Enter the server IP and file name in the interface, click "Upgrade" to complete the upgrade (power off is prohibited during the upgrade, and the physical loop must be removed first).

3. DHCP Server (5.1.7)

Function switch: When enabled, the switch acts as a DHCP server and can assign dynamic IP addresses to LAN devices.

Parameter configuration: Set IP allocation range (such as 192.168.0.2-192.168.0.200), subnet mask, gateway DNS， And the IP lease duration (default 168 hours).

Port IP binding: A fixed IP can be assigned to a specified port to ensure that the device obtains the same IP every time it connects.

4. Port settings (5.1.8)

Port control: Set port enable/disable, rate/duplex mode (such as auto negotiation, 100 full), flow control mode (symmetric/asymmetric), and port security (only allow MAC addresses in the security list to forward data when enabled).

Rate limit: It can limit the inbound/outbound traffic of ports and support classification restrictions based on "broadcast frames", "broadcast+multicast frames", and "broadcast+multicast+flood unicast frames".

Trunk port aggregation: supports static aggregation or 802.3ad LACP dynamic aggregation, merging multiple physical ports into logical links to improve bandwidth; The number of active ports in the aggregation group can be set, and the backup port will be automatically activated in case of failure.

5. Network redundancy (5.1.9)

Redundant Ring: Supports three topologies: ring, ring coupling, and dual homing. It requires specifying the "Ring Master", "First Ring Port", and "Second Ring Port"; Ring coupling is used to split a large ring into two small rings, reducing the impact of topological changes; Dual attribution is used to connect redundant rings and backbone switches through RSTP links.

RSTP configuration: After enabling RSTP, the bridge priority (0-61440, a multiple of 4096, with higher priority for smaller values), maximum aging time (6-40 seconds), Hello time (1-10 seconds), and forwarding delay (4-30 seconds) can be set, satisfying the formula "2 × (forwarding delay -1) ≥ maximum aging time ≥ 2 × (Hello time+1)".

6. VLAN configuration (5.1.10)

802.1Q Tag VLAN: Based on the IEEE 802.1Q standard, cross vendor switch VLAN partitioning is achieved by inserting VLAN tags (VID) into Ethernet frames, supporting GVRP protocol automatic synchronization of VLAN configuration; By default, all ports belong to the default VLAN with VID=1 (which cannot be deleted). Ports can be set to Access (only carrying untagged frames), Trunk (only carrying tagged frames), or Hybrid (simultaneously carrying two types of frames) modes.

Port based VLAN: Logical networks are divided by ports, and only members of the same VLAN can exchange data. Ports that are not selected are automatically assigned to another VLAN; Ignore VLAN tags when enabled.

7. Traffic priority (5.1.12)

QoS strategy: Supports "strict priority" (high priority queue data is transmitted first until empty) or "8:4:2:1 weighted fair queue" (proportionally transmitting high/medium/low/lowest priority queue data).

Priority classification:

Port based: Assign a priority level of "high/medium/low/lowest" to each port.

Based on COS/802.1p: Map to level 4 queue according to the 802.1p field values (0-7) in the frame.

Based on TOS/DSCP: Map to level 4 queue according to the TOS/DSCP field values (0-63) in the IP header.

8. Security Configuration (5.1.14)

IP Security: Only allow IPs in the 'Secure IP List' to manage switches through Web/SNMP.

Port security: After enabling, the port is prohibited from learning new MAC addresses and only forwards MAC frames from the security list.

MAC blacklist: Discard frames with target MAC addresses in the blacklist to prevent specific devices from receiving data.

802.1x authentication: Radius server IP, authentication port (default 1812), billing port (default 1813), shared key, etc. need to be configured, supporting four authorization modes: port "Accept", "Reject", "Authorize", and "Disable".

9. Alarm and Monitoring (5.1.15-5.1.17)

System alarms: Supports SYSLOG (local/remote server logs), SMTP email alarms, and can be triggered by events such as "system cold start", "power status", "SNMP authentication failure", "redundant ring topology change", etc; The fault relay is triggered synchronously when an alarm is triggered, and the Fault LED is constantly on.

Status monitoring: View MAC address table (dynamic/static entries, support aging time setting), port statistics (data volume, error frames, etc.), system event logs (can be refreshed/cleared), port mirroring (copy source port TX/RX data to target port monitoring).