Programmable relay, 24 VDC supply, 6x 24 VDC inputs (2 of which can be 0-10V analog inputs), 4x relay outputs 5A, RTC, LCD display,unexpandable

Siemens ZN-31U
INPUT MODULE, SYSTEM 3, DUAL CONTACT ZONE MODULE, 2 RED LED ALARM LAMPS, 2 YELLOW LED TROUBLE LAMPS, NORMAL CURRENT



























