Product shipped on or after Feb. 8th, 2016 The "3034" and "3034H" are internal part designation that LCN uses to specify regular (3034) and hold open ...
On Feb 8th, 2016 - LCN launched the redesign of the Hold open clip which changed multiple components of our Track style closers, including the roller, track, hold open clip, and bumper.   
The 8310-806K/R is used when a remote OFF/AUTO/HOLD OPEN is required and is normally used with a 4630/4640 CS (concealed switch) unit.
For wiring diagram see here.
The 4630/4630 operator has a 12 VDC and 24 VDC output that can power an electric strike or maglock. The wiring diagrams are shown on page 14 of the installation instructions (attached). 4600 Insta...
The 4600 Series operator has both a 12VDC and 24VDC output rated at 1A (combined load) to power strikes, maglocks, and other devices, but an EL device "always" has to have a separate PS914-2RS Seri...
There are 2 wiring diagrams for sequencing a double door vestibule application shown on page 13 of the 4630/4640 installation instructions.