Securitron iMXDa_iEXDa_CH INSTALLATION - Manual (Page 17)

P/N 500-22155
Page 17 Rev. A, 11/12
APPENDIX B
Wire Gauge Factoring
Remote Power Supply
 The iMXDa/iEXDa requires adequate voltage and current for proper operation.
 Resistance is created by the length and gauge (size) of the wire being used.
 An accurate estimated distance from the power supply to the opening is crucial.
 For optimum operation the correct size gauge wire must be used.
 The devices used operate the best with the least amount of resistance on the source.
 Using the correct gauge wires protects against large voltage and current (load) losses.
 The gauge is determined by the wire distance, voltage and current of all devices.
Determining Wire Gauge
 Follow Example A (12VDC system) and Example B (24VDC system) below.
 Use Table B-1 and Table B-2 to determine the correct wire gauge for the application.
Example A: (an iMXDa used in a 12VDC system)
Devices Used Amps (12VDC) Progressive Totals
iMXDa 0.370 0.370
DK-26 Access 0.160 0.530
MK Bypass/Reset 0.020 0.550
Total Current Rounded Up (Table 1) 0.600A
Using Table B-1 (12VDC) Find: - Current Draw .600 Amps
- Wire Distance 200 Feet (One-Way)
Solution: 18 Gauge is indicated for proper installation
Example B: (an iEXDa used in a 24VDC system)
Devices Used 24VDC Amps Progressive Totals
iEXDa 0.270 0.270
TSB Touch Bar 0.025 0.295
DK-11 Access 0.070 0.365
Total Current Rounded Up (Table 2) 0.400A