Suggested Controller Circuits; Grc1 Description; Grc2 Description; Dzc1 Description - HOLLISTER-WHITNEY Rope Gripper 620 Installation, Maintenance & Troubleshooting Manual

Pumping unit

Hide thumbs

Table Of Contents

Table of Contents

Both the B44 and A17.1-2000 Codes require new circuitry for activation of the "ROPE

•

". It is the controller manufacturer's responsibility to provide proper circuitry

GRIPPER

that meets all applicable codes and laws for operating this device.

The function of the "ROPE GRIPPER

•

recommend that the gripper is activated when an overspeed occurs or when the car leaves the

floor (door zone) with the doors open (hoistway door unlocked and/or the car gate switch

open). If the doors happen to open while the car is between floors, the gripper should not be

activated.

In addition, the "ROPE GRIPPER

•

returns, if the car is in the door zone, we recommend resetting the gripper. If the car is

between floors when power returns, or if changing from "Inspection" to "Automatic"

operation, we suggest a time interval to signal door closure, and when the car gate switch or

door interlock makes contact, then reset the "ROPE GRIPPER

•

The suggested circuits shown in Diagrams 1 & 2 activate the gripper by opening contacts

RG1, RG2, DZ1, and DZ2. Relay coils RG1, RG2, DZ1 and DZ2 are controlled by the

Governor overspeed switch (GOS) and function blocks GRC1, GRC2, DZC1, and DZC2,

respectively.

If the car is not in the door zone when main line power turns "ON", or when switching from

•

"Inspection" to "Normal Operation", or when resetting the Governor overspeed switch; allow

a time interval, signal the door closure, and when the car gate or door interlock contact

makes, energize RG1.

Anytime the car is in the door zone ("Inspection" or "Normal Operation"), RG1 is de-

•

energized when both the car door contact and hoistway door interlock contact are opened.

Should the car now leave the door zone (unintended motion), power to the gripper is

removed and the gripper is activated. In the door zone, when the car door contact or

hoistway door interlock contact is made, energize RG1. If the car should leave the door zone

with RG1 energized, then gripper activation is prevented. RG1 should remain energized

even if both the car and hoistway doors are opened while between floors. When the car is in

the door zone again, RG1 should function as above.

•

Redundant circuits are required by the 2000 A17.1 and B44 Codes. Circuits for RG2

function identical to RG1 except separate logic for the timing function, door locks, gate

switch and door zone should be used. DZC1 logic could be used for circuits of RG1 and

DZC2 for circuits of RG2. (See NOTE in Diagram 3)

•

DZ1 is energized in the door zone and de-energized outside of the door zone (See Diagram 3

NOTE). Maximum door zone is ±3" (6 INCHES TOTAL).

•

Circuits for DZ2 function are identical to DZ1 except a separate door zone signal is utilized.

•

If the above circuits (Diagram 3) do not make contact when required, the elevator must be

prevented from running. If other types of relays are used, circuits must prove that contacts

from RG1, RG2, DZ1 and DZ2 are functioning properly and when a failure is detected the

elevator must be prevented from running.