Carmanah Technologies Corp. | 250 Bay St, Victoria, BC V9A 3K5, Canada | 1-877-722-8877 |
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G SERIES USER MANUAL
5.0 INSTALLATION OF OPTIONAL ACCESSORIES
5.7 DC Relay Kit Installation
For solar-powered systems it is important to discuss your application with a Carmanah
representative to ensure your load will operate sustainably in your location. Shade
analysis is highly recommended for understanding how solar access will change
according to the time of year. Contact Carmanah for a detailed examination and solar
simulations for your site.
The G Series DC Relay Kit option includes a pre-installed DC relay. The relay input is prewired to the OUT2
output of the EMS. The relay DC load side is wired to the bottom two Input/Output terminals (
DC− and SWDC+
)
on the EMS. When the EMS LED output turns on, the digital output on the EMS is enabled and the output
terminals of the relay close to operate a DC load.
The behavior of the Output is modified by the output setting on the EMS. When set to “nite”, the
output will only be enabled when the LED output is on and at nighttime. See Section 6.1 for
details.
The relay model supplied with the DC Relay Kit is Omron part number G3NA-D210B-DC5-24.
Please see Omron’s datasheet for more information.
To install a DC load:
1. Remove solar fuse, and then battery fuse from right side cabinet.
2. Install suitable #6 stud fork spade terminals onto DC load wires (recommended).
3. Install DC
negative (−)
load terminal into second-from-
bottom DC− terminal on EMS
, torque to 12 in-lb.
4. Install DC positive (+) load terminal into bottom SWDC+ terminal on EMS, torque to 12 in-lb.
5. Secure DC load cable jacket to chassis with cable tie.
6. Ensure other system wiring is complete before replacing the fuses.
