SM500A—Automatic Switching System
Black Box Corporation
13
990-000-0001-E8
Figure 2.3. From left to right, Power Supply/Control Cards SM531-C (12VAC) and SM532-C
(-48VDC)
Figure 2.3a. From left to right, Advanced Control Cards SM533-C (12VAC) and SM534-C (-48VDC)