Campbell Scientific CC640 Digital Camera - Manual (Page 52)

Appendix B. DC Heater Kit
12. Connect terminal number 2 of the solid state relay to the 12-Vdc source.
Do not use the datalogger as a 12 V source.
13. Connect terminal 3 of the solid state relay to the control port on the logger
that will be used to control the relay.
14. Connect terminal 4 of the solid state relay to a power ground on the logger.
FIGURE B-5. Solid State Relay Connections
B-4