Acme Controls - Chicago, IL
Distributor, Service Company
Worldwide distributor of new & rebuilt I/O & interface boards. Types of boards include motor resistor boards, control boards & plug-in boards. Control boards can handle ambient temperatures from -30 degrees F to 130 degrees F. Available in 115 V voltage rating with screw type electrical connections. Control boards can be configured for single level service, differential control & low water cutoff control.
acmecontrols.rtrk.com/?scid=2216829&rl_alt=...

G & O Thermal Supply Co. - Chicago, IL
Distributor, Custom Manufacturer
Distributor of Direct Digital Controllers used for control of HVAC Equipment.

Tek Supply, Inc. - Woodstock, IL
Manufacturer, Custom Manufacturer, Service Company
Distributor of reconditioned programmable logic controllers & components from a wide variety of manufacturers. Repair service with warranties are available for all PLC's, CNC's & industrial PCB's.