Rockford Systems, LLC
16
Call: 1-800-922-7533
SSC-1500 Part Revolution Solid-State Control
SECTION 3—INSTALLATION OF COMPONENTS
Control Box
(continued)
The SSC-1500 press control is an economic, full-featured, dual-microprocessor based press control for part revolution mechanical power presses.
This control system is designed to comply with
OSHA 29 CFR 1910.217, and ANSI B11.1 and B11.19
. It is a replacement for existing relay-based
control systems, found in users’ plants, or can be furnished for new or rebuilt presses.
This control can be supplied in a custom box with a motor starter(s) and a disconnect, or as a standard control to interface with existing press motor
controls. Enclosure systems for the control include a standard 20” x 20” x 8” box with the keypad/display mounted on the door of the enclosure. A
plain door enclosure with the keypad/display mounted in a remote operator station may have been furnished.
When the control box is wired to an existing main motor starter, the starter must have a 120-V coil and in most cases, an auxiliary contact. If the
starter does not have these components and they are not readily available, please contact Rockford Systems for a replacement magnetic motor
starter.
The system uses redundant inputs from devices such as palm buttons, foot switches, and light curtain(s). The system output to the dual solenoid
air valve is provided by one safety relay with force-guided contacts and two solid-state relays. These output relays are independently controlled
and cross-checked by the microprocessors. This allows control-reliable operation of the outputs in the event of a single control component
failure. Each microprocessor also has its own logic power supply. This decreases the possibility of simultaneous control failure because of a fault
within the power supply system. All the inputs are optically isolated for electrical noise immunity. Timing and motion detection of the crankshaft
is provided by the resolver/pulser assembly. The operator provides setup information through the use of the keypad/display and messages are
shown on the 4-line x 20-character LCD.
This solid-state control operates at a low voltage. Any component such as the dual valve or anything the control will operate (i.e., relay, solenoids)
that is at a higher voltage (115 V) must be suppressed. Three (3) suppressors are furnished with all control boxes. Make sure they are installed on
the solenoid contacts to filter out electrical noise that could affect the operation of the control.
Two extra fuses are also furnished with all control boxes. Use the corresponding replacement fuse if the original fuse should blow on the printed
circuit board (fuses F1 through F6—see page 20), or to replace a blown fuse inside the OFF/ON switch on the side of the control module
(see Photo 3.7).
Photo 3.6
Three suppressors and two extra fuses
are furnished with each control.
Photo 3.7
Fuse location in the OFF/ON switch
on the control module.
Fuses MPF1
& MPF2
(Continued on next page.)
