Electro Cam 5000 Series - Manual (Page 18)

3-6 Wiring
The output board which contains the output transistor array
chips and the fuse(s) is located under the output board
cover. The pluggable output terminal strips plug into recep-
tacles that are mounted to the output board The only time
it will be necessary to remove the output board cover is
when an output fuse is blown or a transistor array chip is
damaged.
Output Transistor Array Chips:
Each group of 8 output transistors is contained in a single 18
pin transistor array chip. If one or more of these transistors
becomes damaged, the chip can simply be unplugged from
the socket and replaced. Note that Sinking and Sourcing
output boards do not use the same transistor array chip.
Output Fuses:
Each group of 8 outputs (1 transistor array chip) is protected
by a 1 Amp plug in fuse. This fuse will blow if the DC power
polarity is incorrectly wired to the “+” and “-” terminals on the
output terminal strip. On the sourcing output versions this
fuse will also blow if the total amount of current being
conducted by that group of 8 outputs exceeds 1 Amp. If a
fuse blows, all 8 of the outputs in that group will be inopera-
tive until the fuse is replaced.
Output Cables:
Pluggable screw terminal strips are used to connect the
transistor outputs to the load device. Therefore, no special
connectors are needed for output wiring. However, shielded
cable is recommended (Electro Cam part #: PS-4300-04-
XXX, 2 cables required for systems with more than 8
outputs) to maximize immunity to electrical noise. The
shield should be connected to the grounding screw located
on the back panel just above the output terminal strips. The
shield should be unconnected at the load end of the cable.
Also, the cable should be kept away from other electrical
wiring, especially control wiring involving solenoids, relays,
contactors, and motors.
Built-In Transistor I/O Chips: Specifications
PS-5011
PS-5111