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994-0089–1.00–2, General
IRIG-B Input Adapter
IRIG-B Distribution Adapter
The IRIG-B Distribution Adapter (GE Part No. 520-0212) is an optional IRIG-B output card
to supply an IRIG-B (TTL) signal passed from the IRIG-B Input card to attached IEDs. The
IRIG-B Distribution card provides four channels on a single terminal block. Each channel
is capable of supplying a signal to up to four IEDs, for a total of 16 IEDs. The IRIG-B
Distribution card plugs into a dedicated IRIG-B slot (slot 10) on the D400.
IRIG-B Distribution Adapter
IRIG-B Distribution Terminal Block Signal Definitions
Channel Terminal Block
Position
Function Signal Flow
Channel 1 1 IRIG-B TTL OUT
2 GND -
3 FGND -
Channel 2 4 IRIG-B TTL OUT
5 GND -
Channel 3 6 IRIG-B TTL OUT
7 GND -
8 FGND -
Channel 4 9 IRIG-B TTL OUT
10 GND -
Note: The terminal block positions are numbered from 1 to 10 starting from the bottom
of the card.