IPBridge Installation Guide
Page 25
5.2: TTL OUTPUTS
The IP-Bridge supplies two TTL outputs for each door, as shown in Figure 14.
The TTL1 and TTL2 leads are logical output leads. In their “normal” state, there
is a 5VDC potential on the leads. When the leads “activate”, this voltage
potential is removed (0 VDC).
These leads are typically used to connect to an alarm system. Certain alarm
conditions of the IP-Bridge can be configured to activate these leads. An
example would be having TTL2 activate when the door is held open too long.
Figure 14
The “TTL” signal’s return connection will be attached to the IP-Bridge’s Signal
Ground. See the previous “Signal Ground Connections” section of the manual for
more information regarding this part of the connection.
