This Trap Relay Device Converts SNMP to Contact Closures

Nowadays, more and more equipment only uses protocols such as SNMP, Modbus, or DNP to output alarm data. These protocols are not contact-closure based. So, whether you have a fire alarm control panel or any other piece of gear that only takes in contact closures, the Trap Relay device will fix this gap and translate SNMP to contact closures.

The following diagram shows how it works.

The Trap Relay will act like a translator; detecting SNMP traps, processing them, and sending them out as Contact Closure

At the top of the diagram is the SNMP-enabled equipment sending SNMP traps (in different versions) to the Trap Relay 32 device. It is important to set up the different traps that you are looking for in the Trap Relay's web interface. For instance, you might want to specify an OID or a variable binding that the device will use to identify incoming traps. For example, in the case that the Trap Relay spots Trap number 6 then it is going to latch Contact Closure number 6. If the device spots Trap number 10, it will latch a Contact Closure number 10, and so on.

Trap Relay conversion process:

  1. SNMP "Alarm" Trap Received
  2. Corresponding Control Relay Latched
  3. SNMP "Clear" Trap Received
  4. Corresponding Control Relay Released

The Trap Relay device has 32 different traps, so there are 32 relays that it can latch. Each trap must have a corresponding clear trap configured. The clear traps are responsible for sending the command to release, making it possible to latch and release relays in reaction to inbound SNMP.

For double the capacity, there is also the Trap Relay 64. This is the same device, but instead of 32 it will take 64 different traps, latching and releasing 64 different relays.

Due to its output capacity, the Trap Relay is a big device. It has a 2 RU chassis, so it is two racks units high. It does fit into a 19 or 23 inch rack, and both sets of ears are included in the box.

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