44 GENERAL D400 SUBSTATION GATEWAY USER’S MANUAL
IRIG-B DISTRIBUTION ADAPTER CHAPTER 3: SETTING UP COMMUNICATION CARDS
IRIG-B distribution adapter
The IRIG-B Distribution Adapter (GE Item No. 520-0212LF) is an optional IRIG-B output card
to supply a pulse width coded IRIG-B (TTL) signal passed from the IRIG-B Input card to
attached devices. 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 devices, for a total of 16
devices. The IRIG-B Distribution card plugs into a dedicated IRIG-B slot (slot 10) on the
D400.
Output Voltage
Output as per advanced HCMOS duty cycle may vary up to ±10% from nominal when the
AM modulation option is used. The connector used is a 10 position, 5.08 mm pitch
pluggable connector, Molex part number 39530-0010 (GE Item No. 640-0955).
See “IRIG-B connections” on page 58 for wiring instructions.
Configuration options
There are no selectable options on the IRIG-B Distribution card.
The signal format outputted to the IRIG-B distribution adapter is dependent upon the
format applied to the IRIG-B input adapter:
Figure 22: IRIG-B Distribution Adapter
IRIG-B Input Format... IRIG-B Output Format...
Pulse Width Modulated (B0xx) Pulse Width Modulated (B0xx)
Manchester (B2xx) Manchester (B2xx)
AM Modulated (B1xx) Pulse Width Modulated (B0xx)
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