Pinout - X19 Signal board terminal
10-pin connector, Light 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.10.1). 10 of 10 positions are wired.
| Pin | Signal | Wire color |
|---|---|---|
| 1 | L+ | blue |
| 2 | M | white/blue |
| 3 | AI 0+ | blue |
| 4 | AI 0- | white/blue |
| 5 | AI 1+ | blue |
| 6 | AI 1- | white/blue |
| 7 | AI 2+ | blue |
| 8 | AI 2- | white/blue |
| 9 | AI 3+ | blue |
| 10 | AI 3- | white/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-6ES7231-4HD50-0XB0-X19-1M-20AWG
- TPC - Think-PLC pre-fabricated connector harness
- 6ES7231-4HD50-0XB0 - Siemens order number of the SB 1231 AI 4x14bit
- X19 - Signal board terminal
- 1M / 2M / 3M - lead length in meters
- 18AWG / 20AWG - conductor size
What is in the bag
- G2 push-in connector, 10 positions, light 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 - SB 1231 AI 4x14bit - X19 Signal board terminal (10-pin)
Plug in, land the ferrules, done. This harness fits the X19 terminal of the SB 1231 AI 4x14bit 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-6ES7231-4HD50-0XB0-X19-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.