Bus interface unit (biu)*
The Bus Interface Unit (BIU) is an interface between Port 1
of the Controller and the terminal facility and loop
detector racks. Port 1 uses a SDLC (synchronous data link)
communication protocol with a bit rate of 153.6 Kb per
second. The BIU’s functions include controlling field I/O to
and from the controller. The BIU meets the specifications of
NEMA TS2-1998, Section 8.
Part Number 122-200
* Other Models Available.
Specifications
Dimensions:....................2.34"W x 4.5"H x 6.5"L
(59 mm W x 144 mm H X 165 mm L).
Power Requirements:......24VDC +/- 2VDC.
Indicators:.......................Supply Voltage, Port 1 Transmitting.
Interface:........................Port 1, a 15 pin “D” female connector.
Inputs/Outputs:...............8 inputs, 4 optical inputs, 15 outputs,
24 input/outputs
* Other Models Available.