Cisco IG21 Series Installation Manual page 26

Installing the DIN Rail Bracket on Cisco IG21R Rugged IoT Gateways or Cisco IG31R Rugged IoT Gateways
b. Attach the adapter plate to the gateway with the four M4 6mm panhead screws provided.
Use a #2 Philips head screwdriver to torque each screw to 13-15 inch-pound.
Figure 15: Attaching an Adapter Plate to the IG21R or IG31R
2. Perform these actions to attach the DIN rail bracket to the adapter plate, as shown in
the DIN Rail Bracket to the Adapter
a. Position the DIN rail bracket over the adapter plate to support either vertical or horizontal mounting.
b. Attach the bracket to the adapter plate with the two M4 6mm countersink screws provided.
Use a #2 Philips head screwdriver to torque each screw to 13-15 inch-pound.
Cisco IG21 IoT Gateways, Cisco IG21R Rugged IoT Gateways, and Cisco IG31R Rugged IoT Gateways Hardware Installation Guide
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Plate:
Installing the Gateway
Figure 16: Attaching