Hello, don't know is it a bug or how really works bluepower timer, but if I tried to connect it to pneumatic tube directly it gives only one tick, then timer get back signal and get constant signal for input and output on a same wire.
The situation repeats itself with bluepower repeater, but not with original redstone repeater! It gives me ticking of timer without affecting timer.

Screenshot (not updated for the newest version of BP): http://i.imgur.com/0Y9fJX6.png
From left to right:

1. ticking, wire cannot be connected to original redstone
2. connected and ticking without recieving back a constant signal
3. connected, only 1 tick and constant signal as a result
4. ticking(by the way no output signal at all may be), cannot be connected to a tube

p.s. with BP repeater the situation is the same as for 4) or 2) using original redstone

Screenshot?

The way you are supposed to do this is like in the 4th case, but with a freestanding wire in the same blockspace as the normal wire. It'll then connect to both the tube and the other wire allowing them to share power :)
Wires powering redstone and redstone powering wires is something we've always tried to avoid and that should be fixed in the next update :)