Interesting design. Nice example for using the existing technology to fulfill new needs and to solve new problem. It’s just like:
#include <master_box.h>
…
int fire_alarm(int zone){
masterbox_trigger(nac_list[zone]);
}
Interesting design. Nice example for using the existing technology to fulfill new needs and to solve new problem. It’s just like:
#include <master_box.h>
…
int fire_alarm(int zone){
masterbox_trigger(nac_list[zone]);
}
that unit is most likely from the late 50s or very early 1960s as a replacement for IBM 4250s; S. H. Couch was the OEM.
Here’s a very rare Wheelock 7002-24 manufactured the 47th week of 1985. Second photo shows the device having pigtail connectors which is why it’s not a 7002T (the “T” series models have screw terminals).