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Screw Terminal, 16-Relay, 150 V, PXI Module Relay Terminal Block—The TB-2666 provides an industrial PXI front-mounting Terminal Block for PXIe-2566 PXI Relay Module. You can use the included screw terminals to access each of the 16 relays. The terminal block also provides connections for trigger output and trigger input signals. The TB-2666 features a 150 V maximum signal voltage range and it can withstand impulse voltage of up to 800 V.