GREER COMPANY
Crane Systems
GREER COMPANY, 1918 E. Glenwood Place, Santa Ana CA 92705 Telephone: (714) 259-9702. Fax: (714) 259-7626. PN W424102 REV C 09/99
MicroGuard
®
424 Installation Manual
6 of 35
SYSTEM REMOVAL AND INSTALLATION
UPGRADING OLDER GREER SYSTEMS
(LA-1250, LAR-1200, BA-1500, & LOHD-1100)
EXTENSION REEL
1.
REMOVE THE COVER ON THE EXISTING EXTENSION REEL.
2. CLAMP THE CABLE FROM THE SENSOR TO THE TRIANGLE PLATE USING CABLE CLAMPS. ENSURE THAT
THE CABLE FROM THE ANGLE SENSOR DOES NOT INTERFERE WITH THE EXTENSION REEL CABLE OR
WITH THE EXTENSION REEL ITSELF.
ANTI TWO-BLOCK CIRCUIT
For MicroGuard
®
424 System installations, the anti Two-Block circuit must be isolated. Two terminal strips
require this modification. One strip is located on the triangle plate and the other is on the extension reel.
TO ISOLATE THE CIRCUIT:
1. STARTING WITH THE TRIANGLE PLATE TERMINAL STRIP, MOVE THE TOP BROWN WIRE TO TERMINAL #5
AND THE TOP BLACK WIRE FROM THE MOUNTING SCREWS TO TERMINAL #6.
2. ON THE SPOOL TERMINAL BLOCK, REMOVE THE 2 CENTER SCREWS. REPLACE THEM WITH THE #4-
40X¼” SCREWS AND SECURE THE WIRES TO THE TERMINAL ACCORDING TO APPENDIX A.
NOTE:
USE A CABLE CLAMP AND ONE OF THE EXISTING SCREWS ON THE EXTENSION REEL COVER
TO HOLD THE EXCESS CABLE. THIS WILL PREVENT THE CABLE FROM GETTING CAUGHT
ON THE REEL.
