52 GENERAL D400 SUBSTATION GATEWAY USER’S MANUAL
TIME SYNCHRONIZATION CHAPTER 4: CONNECTING TO DEVICES AND NETWORKS
Network
The D400 can support up to eight network connections to host and network clients,
including:
• SCADA master station
• Substation LAN
• Enterprise network (Corporate wide area network). The following networking
connections are supported:
– Ethernet (Twisted pair or Fiber optic)
– COM2 (for dial-up)
Time synchronization
The D400 accepts a time synchronization input (IRIG-B format) from GPS receivers that can
be subsequently distributed to connected devices.
Local substation computer
A substation computer can be set up with the D400 through the USB KVM connections to
access the local HMI.
Optionally, a portable PC can be connected to the front Ethernet port to access the HMI.
Local maintenance
A local PC can be directly connected to the D400 through the front serial communications
port to perform system maintenance using the D400 System Utilities.
Cabling overview
The D400 provides a series of I/O adapter cards for connecting cables and wiring from
substation devices and network interfaces. All physical connections are made to easily
accessible connectors on the rear panel of the D400.
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