Banner QMT72 Rope Pull Switches - Manual (Page 6)

Figure 5. Rope Break or Slack: Contact 13/14 (33/34) Opens
Electrical Installation
13
25
14
26
Install
Jumper Wire
Between
Contacts
To
Machine
Control
Stop
Circuit
Figure 6. Wire the two switch contacts in series
Access to the Wiring Chamber. The wiring chamber is
accessed via a cover plate (remove four screws). A conduit
adapter is supplied to convert the 20 millimeter threaded
entrance to 1/2-inch NPT. An accessory cable gland that fits the
M20 thread is also available (see Accessories).
Wiring. Install a jumper wire to place switch contacts 13/14
and 25/26 in series, as shown.
For model RP-QMT72F-12L, install a jumper wire to place
contacts 33/34 and 45/46 in series, to provide a dual-channel
output to a safety device. If dual-channel output is not required,
either or both contacts may instead be used as monitoring
outputs (in which case no jumper is required).
Maintenance/Checkout
At switch installation or replacement and at machine set up, a Designated Person 1 must test each switch for proper
machine shutdown response and check the switch(es) and installation for proper operation, physical damage, mounting
(looseness), and excessive environmental contamination. This must also take place on a periodic schedule determined by
the user, based on the severity of the operating environment and the frequency of switch actuations. Adjust, repair, or
replace components as needed. If inspection reveals contamination on the switch, thoroughly clean the switch and
eliminate the cause of the contamination. Replace the switch and/or appropriate components when any parts or
assemblies are damaged, broken, deformed, or badly worn; or if the electrical/mechanical specifications (for the
environment and operating conditions) have been exceeded. Always test the control system for proper functioning under
machine control conditions after performing maintenance, replacing the switch, or replacing any component of the switch.
Additional items that should be included in the checkout and/or regularly scheduled maintenance of a rope pull system:
• Check for proper rope tension and adjust as needed
• Verify free operation (no binding) of the rope and proper tripping when the rope is pulled
• Periodically lubricate the pulleys and other moving parts associated with the rope
• Repair any loose or damaged hardware, worn/frayed rope (cable), missing red rope sheathing or flags/markers (if
used)
• Remove or clean off any contamination and eliminate its cause
Repairs
Contact Banner Engineering for troubleshooting of this device. Do not attempt any repairs to this Banner device; it
contains no field-replaceable components. If the device or a device component is determined to be defective by a
Banner Applications Engineer, they will advise you of Banner's RMA (Return Merchandise Authorization) procedure.
1 A Designated Person is identified in writing by the employer as being appropriately trained to perform a specified checkout procedure.
Rope Pull Switches
6 www.bannerengineering.com - tel: 763-544-3164 P/N 62084 Rev. C