PAM Series relay modules are encapsulated devices providing 10-A form C contacts. They are designed for applications where remote relays are required for control or status feedback. The PAM-1 multivoltage unit may be energized by 24 vac, 24 vdc, or 115 vac. The PAM-4 multivoltage relay has an input voltage range of 9 to 40 vdc. The PAM-SD is a 24-vdc polarized device that may be energized by an input voltage of 18 to 32 vdc. The input has a built-in polarizing diode. Air Products and Controls, Inc., 1749 E. Highwood, Pontiac, MI 48340; 248-332-3900; 248-332-8807 (fax).