Harrington Hoists and Cranes MR Trolley - (MR2) User Manual
Page 24
3.4.7
The following instructions apply to installations where an ER2 or NER2 model electric hoist is installed
on an MR2 trolley. In this case the hoist and trolley are controlled by a pendant with four push buttons
– two for the hoist motion and two for the trolley motion. Special wiring considerations must be taken if
the trolley is used with a hoist other than an ER2 or NER2 model.
Pendant Cord - The Pendant Cord connects to the trolley via an 8-pin (8P) Plug and Socket. Make
this connection as follows:
1)
Refer to Figure 3-14 or 3-15 depending on the product code of the trolley/hoist.
2)
Insert the 8P Plug into the 8P Socket on the Switch Box and hand tighten the Screw Coupling.
3)
For trolley/hoist code ER2/NER2M001H to ER2/NER2M100L – Install the Cord Strain Relief Cable
to the Cord Support on the Bar Holder.
4)
For trolley/hoist code ER2/NER2M100S – install the Cord Strain Relief Cable onto Cord Strain
Relief Stopper located at the 8P socket.
5)
For trolley/hoist code ER2/NER2M150S and ER2/NER2M200S – Install the Cord Strain Relief
Cable onto Connection Plate S.
Power Supply Cable Hoist Connection – The Power Supply Cable connects directly to the trolley's
Switch Box using Cable Holder Assembly. Make this connection as follows:
1)
Refer to Figure 3-14 or 3-15 depending on the product code of the trolley/hoist.
2)
With 1 inch of the outer cable insulation extending beyond the cable packing, insert the cable into
the switch box and screw together Cable Holder A and B.
3)
Refer to Figure 3-16 and connect the red, blue and black wires to terminals 1, 2, and 3 on the
terminal strip inside the Switch Box. Connect the ground wire (green with yellow stripe or solid
green) to the ground terminal next to the terminal strip.
4)
Install the Cable Support Assembly (pre-installed on the Power Supply Cable) onto the Cable
Support Arm Assembly as shown in Figure 3-17.
5)
Use care to avoid twisting or kinking the Power Supply Cable.
Trolley to Hoist Connections – The trolley connects to the hoist via short cables that are factory
installed into the trolley Switch Box. The Cables are fitted with plug assemblies that match sockets in
the hoist bodies. Make these connections as follows:
1)
Refer to Figure 3-14 or 3-15 depending on the product code of the trolley/hoist.
2)
Insert the 4P Plug(s) into the 4P Socket(s) on the hoist and hand tighten the Screw Coupling(s).
3)
Insert the 5P Plug(s) into the 5P Socket(s) on the hoist and hand tighten the Screw Coupling(s).
Power Supply Cable Festooning – The MR2 trolley is supplied with Cable Hangers for the Power
Supply Cable. Make this connection as follows:
1)
Refer to Figure 3-17.
2)
Install the Cable Hangers onto the Power Supply Cable spacing them every 5 feet.
3)
Install a Guide Wire system parallel to the beam. Pass the Guide Wire through the Cable Hangers
and Wire Guide.
4)
Make sure the Guide Wire is properly tensioned and the Power Supply Cable is not twisted or
kinked.
24