System Power-Up - Keyscan CA250B Technical Instructions

System Power-up

The following is a guideline to follow on initially powering up the control board.
 connect 12 VDC power to the control board as shown in Figure 54 – Power Supply Wiring
 connect fully-charged backup battery
 connect 2 x 16V 40VA or 16.5V 37VA class 2 transformers - ensure that both CSA/UL approved
transformers and fully-charged backup battery are connected for proper system operation - do not mount
the transformers or bring 120/240 VAC inside the ACU metal enclosure
 repeat battery and transformer connections for additional power supplies
 check ACU voltage test points after power is applied to the ACU - refer to Table 16 and Table 17.
 if software selection S2 switches 9 and 10 were altered, load factory default settings by pressing S1, wait
5 seconds, and then press S3 within 10 seconds.
 upload the database to the ACUs after all correct voltage and current measurements are verified - refer to
the Client on-line help
Notes
For battery circuit and auxiliary power output to function, two (2) transformers must be connected.
Keyscan Inc. – Technical Guide (PC109x - 04.15) 82