GAI-Tronics 227-001 Auto-dial Telephones - Manual (Page 8)

Pub. 42004-338F
Model 227-001, 247-001, 257-001, and 277-001 Industrial Auto-dial Telephones Page 8 of 19
f:\standard ioms - current release\42004 instr. manuals\42004-338f.doc
06/12
Model 257-001
1. Open the front door and remove the four outermost screws from the mid-section using a standard
Phillips screwdriver. Carefully pull the enclosure apart until encountering a slight resistance on the
left side.
2. Open the front half of the enclosure to the left until the length of the telephone cord inside the
enclosure can be disconnected from the PCBA terminal strip (if connected). See Figure 10. Pull on
the left side of the enclosure until the hinge plugs pull loose to separate the front and rear halves. Set
the front half of the enclosure aside.
Figure 9. Model 257-001 Outline Drawing
3. Please refer to Figure 1 and Figure 2 if utilizing conduit for cable installation. If using the gland
bushing provided with the unit, drill a 0.688-diameter hole at either drill spot on the bottom of the
rear enclosure.
4. Push the free end of the telephone cord through the gland bushing using needle-nose pliers. Allow 8–
10 inches of telephone cord to extend past the bushing. Tighten the bushing around the cord. Feed
the free end of the telephone cord through the hole in the enclosure.
5. Secure the bushing in the hole with the supplied locknut using a 7/8-inch wrench and channel locks to
tighten.
6. There are four mounting holes in the rear enclosure. Mount the enclosure on the wall using four ¼-20
machine screws with nuts and washers or #14 wood screws of appropriate length for the mounting
surface. Refer to Figure 10.