CertaUPS C-DB9RELAY Internal DB9 connector relay card for C300R/C400R/C500E (9 pin serial)

CertaUPS C-DB9RELAY Internal DB9 connector relay card for C300R/C400R/C500E (9 pin serial)

Internal DB9 connector relay card for C300R/C400R/C500E (9 pin serial)