DER file for InnerDG CA (part of Schneider Electric Device GenuinenessPKI)
This is a X509 certificate file, using DER format (binary). You can convert it in PEM format using open ssl for example open ssl x509 -inform der -in "certificate".cer -out "certificate".pem It's part of "Schneider Electric Root DG CA" hierarchy, inside sub-level "Device Genuineness CA". All certificates are published on this website.