[1] Digi-CA™ is configured to work many HSMs (nCipher, SafeNet, etc) and as this standard relates to the use of the Secure Signature Creation Device [SSCD] found in HSMs, the fact that these devices meet the standards [2] means that by association, Digi-CA™ complies with this standard.
Links:
[1] https://www.digi-sign.com/downloads/download.php?id=digi-ca-pdf
[2] https://www.digi-sign.com/compliance/introduction