Pinout - X11 Lower User
10-pin connector, Gray, no coding key. Odd pins on the upper row, even pins on the lower row, as numbered in the Siemens S7-1200 G2 system manual (Section A.7.1). 10 of 10 positions are wired.
| Pin | Signal | Wire color |
|---|---|---|
| 1 | 3M | white/blue |
| 2 | 4M | white/blue |
| 3 | DI b.0 | blue |
| 4 | DI b.4 | blue |
| 5 | DI b.1 | blue |
| 6 | DI b.5 | blue |
| 7 | DI b.2 | blue |
| 8 | DI b.6 | blue |
| 9 | DI b.3 | blue |
| 10 | DI b.7 | blue |
Wire colors per NFPA 79 / UL 508A: black AC line, white AC neutral, green/yellow ground, blue DC, white/blue DC common, red relay contacts (assumed AC-switched - tell us if they switch DC).
Part number system
TPC-6ES7221-1BH50-0XB0-X11-1M-20AWG
- TPC - Think-PLC pre-fabricated connector harness
- 6ES7221-1BH50-0XB0 - Siemens order number of the SM 1221 DI 16x24VDC
- X11 - Lower User
- 1M / 2M / 3M - lead length in meters
- 18AWG / 20AWG - conductor size
What is in the bag
- G2 push-in connector, 10 positions, gray
- 10 x UL 1015 MTW conductors, chosen length and gauge
- Insulated ferrules both ends
- Printed signal-name sleeves both ends
- Spiral-wrapped bundle, 100% continuity tested
- Bag label with the full part number
Siemens wiring diagram
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S7-1200 G2 Wiring Harness - SM 1221 DI 16x24VDC - X11 Lower User (10-pin)
Plug in, land the ferrules, done. This harness fits the X11 terminal of the SM 1221 DI 16x24VDC and no other: the G2 connector matches the Siemens connector color and coding key. Every populated position carries a UL 1015 MTW conductor with an insulated ferrule and a printed signal-name sleeve at both ends.
Part number: TPC-6ES7221-1BH50-0XB0-X11-length-gauge. Built to order in Winston-Salem, ships in 3-5 business days. Configure a whole rack at once with the S7-1200 G2 Harness Configurator.