SM500A—Automatic Switching System
Black Box Corporation
26
990-000-0001-E8
3.
Toggle the channel switches. Then toggle the Gang Switch. No switching should be
performed.
4.
Push the SYSTEM GANG button and toggle the GANG switch simultaneously to A
or B. No switching should occur.
5.
Reinsert key into the chassis and turn to the ENABLE position.
6.
Toggle the channel switches in that particular chassis. Each channel should switch to
the required position, and the LED should indicate the switched position.
7.
Toggle the GANG switch to the A or B position. All channels within the chassis
should be switched to the A or B position.
8.
Push the SYSTEM GANG button and toggle the GANG switch simultaneously to the
A or B position. All chassis within the system should switch to the A or B position.
9.
Reinsert keys into all chassis and turn each one to the Enable position. For each
chassis, perform the following steps:
(a) Toggle the channel switches. Each channel should switch to the required position,
and the LED should indicate the switched position.
(b) Toggle the Gang Switch. All channels within the chassis should switch to the A
or B position.
10.
Connect all interface cables to the system. Connect all interface cables to the system
c. Multiple-chassis system requiring manual and remote system gang switching (figures
3.4 and 3.5)
NOTE: A chassis with remote system gang switching must be first in the interconnecting
chain.
All the Power Supply/Control Cards must be interconnected via RJ-11 cables (EL04M-04
or EL04M-14). Connection is from the GANG-OUT connector on this card to the
GANG-IN connector on the succeeding chassis. This procedure is continued until all the
chassis in the system are interconnected. Up to 64 chassis may be connected in this
manner. The chassis with the remote system gang switching option must be first in the
interconnecting chain.
1.
Turn the key-operated switch on all chassis in the system to the horizontal position
and remove the keys.
2.
Toggle the channel switches. No switching should be performed.
3.
Push the SYSTEM GANG button and toggle the GANG switch simultaneously to A
or B. No switching should occur.
4.
Connect control line to the rear contact closure switching connector, following Figure
2.3. Apply -12 volts. All channels within the system should switch to position B.
NOTE: +12V and -12V can be supplied from the card itself (see figure 3.5).
5.
Apply +12 volts. All channels within the system should switch to position A.
6.
Reinsert key into the chassis and turn it to the Enable position.
