Safety Switches
Pro-Line Safety Cable Pull Switch:
For Emergency or Normal Shut-Off
A pull cable is terminated at one end from a fixed mounting and attached at the switch end to one of the actuating arm holes. Force applied to the pull cable at any position causes the actuating arm to rotate 20° to a tripped-locked position. This will stay locked until manually reset by the reset lever.
At the same time as the switch is mechanically locked out, 2 microswitches activate SPDT circuits for alarming equipment circuits of the stop condition. Although the black arm in the alarm condition is quite visible, accessories such as auxiliary flags or lights can be supplied. Also available are specially designed mounting hardware which can eliminate welding or drilling holes in the conveyor for mounting.
Options
- Universal mounting plate
- Secondary flag alarm
- Complete hook-up accessories including: cable, clamps, standoffs, lights
- NEMA-4 and NEMA 9 Alarm Light
- Special finishes for highly corrosive conditions
- European tension spring-loaded mounted hardware
Pro-Line Belt Misalignment Switch:
For Protection of Belt Conveyors and Personnel
- Universal design for mounting on top of conveyor stringers
- Rugged cast aluminum enclosure. NEMA 4 on standard units
- FM approved Class II Div. 1 units have a two part baked urethane finish for extra protection from salt and high corrosion areas
- Full cover plate permits complete, easy access to terminal switch and cams
- Cover plate can be removed without detaching actuating arm
- Heavy-duty, "micro-switch" contacts
- Stocked by distributors
- Heavy duty roller bearings rated to 1250 f.p.m.
- Normal angle of arm adjustable in 22.5° increments
- Available with alarm/shutdown sequence
Run-Off Switches are mounted on the top or bottom of the conveyor stringers with the actuating arm adjusted to the outside edges of the belt.
Under normal conditions with the belt trailing properly, the edge of the belt clears the actuating arms by 1" or more (adjustable by switch positioning).
If the belt skews or runs-off contacting actuating arm, displacing it from the arm's normal vertical position, one or more of the microswitches are contacted.
Displacement of the actuating arm causes a cam to operate a microswitch with DPDT contacts. These contacts may be used for interlocking, conveyor shut-down and/or alarm/annunciation.