Keri Systems SB-293 - Manual (Page 18)

Technical Reference Manual – PXL-250 and SB-293 Keri Systems, Inc.
Page 18 P/N: 01836-004 Revision 5.5
3.4 Current Draw
• maximum current draw 270 mA for a controller plus reader current draw (refer to
Table 1 for Reader current draw)
• 120 mA max for a PXL-250 Controller
• 150 mA max for an SB-293 Satellite Board
NOTE: If an electronic locking device (such as a magnetic lock, a door strike, or
similar device) is to be driven by the same power supply as the PXL-250 controller,
please ensure the power supply provides enough current to drive every device
connected to that supply plus an adequate safety margin. AC power cannot be used.
3.5 Controller Memory Retention
• 5 year lithium battery back up to support controller RAM and real-time clock
3.6 Output Relay Contact Rating
• 1 Amp @ 24 VDC
3.7 Input Device Configuration
• Door Sense normally closed
• Request to Exit normally open
• Global Unlock normally open, or
Auxiliary RTE A-Door normally open
Table 1: Proximity Reader Current Draw
Reader Type
MS-3000 MS-4000 MS-5000 MS-7000 MS-9000
Current
Draw
50 mA 50 mA 100 mA 200 mA 200 mA