907-Ttl (8-Channel Ttl Card); Figure 5-9: 907-Ttl Expansion Card - Focal 907 User Manual

907-0601-00 Rev. C
5.9

907-TTL (8-Channel TTL Card)

Card P/N
Config. Dwg.
Diagnostics:
The 907-TTL shown in Figure 5-9 is an 8-Channel Transistor-Transistor Logic (TTL) multiplexer card based
on the 907-232 expansion card. By means of switch configuration, eight TTL channels are multiplexed into a
single stream (8:1), which is transported over a single backplane data port on the motherboard. Alternatively,
4:4 and 4:1 multiplexing options are available.
The 907-TTL expansion cards have 5 V TVS diodes and 100-ohm inline resistors for protection. Similarly,
outputs have 5 V TVS diodes and 22-ohm inline resistors. Maximum input and output signal ranges are from
-0.5 V to +5.5 V.
Configure switch SW9 to set the backplane data port used by the 907-TTL card. Ports 3~6 are available. The
default setting is data port #3.
Focal Technologies Corp.
902-0212-00
907-2008-01
LEDs Only

Figure 5-9: 907-TTL Expansion Card

Model 907 Video/Data Multiplexer – User's Guide
Page 5-11