IN1804 Seamless Scaling Switchers • Installation 20
Connecting Using an SM Cable
The Contact/Tally connectors can also be used with Extron SM cables. Figure 15 shows
how to wire an SM cable to a contact input.
Black
Red
SM
CT
Figure 15. SM Cable Connecting Contact and Tally Ports
For each SM cable:
• Connect the red (contact) pigtail to the C pin corresponding to the input being used.
• Connect the black (tally out) pigtail to the T pin.
NOTE: In an SM cable, the ground source needed to trigger the contact and the
voltage to drive the tally indicator are supplied by HDMI source device. Therefore, it is
not necessary to connect the cable to a G (ground) pin.
15
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