NC Positioning Main Units NC Positioning Main Units 1. ◇:R ─ Relay output;T ─ Transistor SINK(NPN) output J ─ Transistor SOURCE (PNP) output 2. Δ:2 ─ built-in RS232 port;U ─ built-in USB port (non-standard) 3. ◎:AC ─ 100~240VAC power supply D12 ─ 12VDC power supply D24 ─ 24VDC power supply 4.–C:Blank ─ Standard;–C ─ add in RTC 5. The unmarked frequencies of Digital Input (DI) or Digital Output (DO) are low speed. FBs-20MN◇Δ–◎ FBs-32MN◇Δ–◎ FBs-44MN◇Δ–◎