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Fial Incorporated
2311AL SNMP Alarm Encoder (RTU)
View larger photos of the 2311AL SNMP Alarm Encoder (RTU)
View larger photos of the 2311AL SNMP Alarm Encoder (RTU)
Key Features:

SNMP V2 Alarm and Control
Configurable over the IP network
Ethernet 10/100baseT Port
32 Opto-isolated Alarm Inputs
Up to 16 Virtual Alarms
16 Control Outputs
1 Alarm Summary Output
16 Single-ended (8 Differential)
    Isolated Analog Inputs (optional)
Wide Range DC Power Input
32 front panel alarm LEDs

Alarm remote accepting alarm contact closure (and optionally analog voltage) inputs and providing remote control relay closure outputs using SNMPv2 protocol, web configuration; 1 RU high; multiple rack mounting positions; 18 to 56 VDC floating power supply

Model 2311AL Characteristics
Ethernet Interface  
     LAN Port
     Performance Data
RJ-45 Female

Packets, buffers, comm errors (MIBII)
LED Indicators  
      Power (green)
Unit fail (red)
Summary alarm (amber)
Critical Alarm (red)
Major alarm (red)
Minor alarm (amber)
Control asserted (green)
LAN port activity (green and amber)
Craft Configuration Port  
     9 pin female D-Sub (DB9F) shielded RS-232, 9,600 baud
8/N/1, no parity, no flow control
Embedded Ethernet configuration program
     Input Power Range
     Power Consumption
     Power Connection
18 to 56 VDC, floating
4 to 7 Watts
3 pin DC filtered power connector
(+, -, chassis ground)
     Operating Temperature
     Humidity Range
     Storage Temperature
0 to +50° C
5% to 95%, Non-condensing
-40 to +70° C
Physical Characteristics  
     Shelf Size
     Rack Mounting
     Shelf Weight
1.75” H (1 RU), 19” W, 11” D
Flush, 2” or 5 1/8” projection
5 pounds
Virtual Alarms  
     Up to 16 virtual alarms can be created by Boolean logic combinations of external alarms
Alarm Inputs  
     50 pin female Centronics/Champ
     Programmable alarm delay before assertion
32, Opto-isolated, 22 kΩ to station battery
Programmable as Alarm or Status
Control Outputs  
     50 pin female Centronics/Champ
16, Form C relays
1 Alarm summary output, Form A relay
Momentary or Latching
Programmable NO or NC
1 amp max, DC
0.6 amp max, AC
Analog Voltages  
     optional, field upgradeable)
     5 pin female D-Sub (DB25F) shielded
16, ground referenced, single-ended inputs
(use pairs for up to 8 differential inputs)
can use both single-ended and differential)
Each input has 5 plus or minus ranges
(0 to 7.5, 15, 30, 60 or 120 VDC)
Polarity and range set via software
52 kΩ to ground, low pass filtered


   2311AL Tech Data Sheet (PDF file size 299.38 KBs)
2311AL Tech Data Sheet (View as Webpage)
   2311AL Manual (PDF file size 1.39 MBs)