UN286-2AM33-0XB0, UNIMAT, programmable controller CPU286 (24 V DC, 14DI/10DO relay)

UN286-2AM33-0XB0 – programmable controller CPU286, UNIMAT

Technical specifications

Wiring diagram and example

Indicative wiring diagram for the supply, a digital input and output. Term. = CPU terminal. For an actual installation, verify the current documentation.

CPU supply:  +24V DC ---[breaker]--- L+ (term.)
                 0V  --------------- M  (term.)
              (24 V DC)

Digital input (sink/source, typically sourcing):
  +24V ----+---[ sensor ]---- Ix.x
           |
   0V -----+------------------------ M

Digital output (relay, electrically isolated groups):
  1L (group common term.) ---[ load supply 24V DC / 230V AC ]
  Qx.x ----[ load ]---- 1L
  Each relay group has its own common terminal – AC and DC loads can be switched in different groups.

What else to buy for this CPU

The CPU supports up to 7 EM expansion modules (combination of digital and analogue). Recommended related components from our range:

• UN 221-1BH22-0XA0 – EM221, 16x DI
  Expansion module EM221 compatible with all CPUs S7-200/UNIMAT in this assembly.
• UN 222-1BH22-0XA0 – EM222, 16x DQ transistor
  Expansion module EM222 compatible with all CPUs S7-200/UNIMAT in this assembly.
• UN 223-1BH22-0XA0 – EM223, 8x DI / 8x DQ transistor
  Expansion module EM223 compatible with all CPUs S7-200/UNIMAT in this assembly.
• UN 235-0KD22-0XA0 – EM235, 4x AI / 1x AQ, 12 bits
  Expansion module EM235 compatible with all CPUs S7-200/UNIMAT in this assembly.
• UN 901-3DB30-0XA0 – programming cable PC/PPI
  Required for connecting the CPU to a computer with STEP 7-Micro/WIN. software
• UN 214-1AD23-0XB0 – CPU224
  Alternative CPU size/supply from the same family.

Frequently asked questions

Is it an original Siemens or a replacement?

This is a compatible UNIMAT replacement made for the S7-200. platform. It is not a Siemens product.

Does it work with STEP 7-Micro/WIN software?

Yes, it is programmed with the same software as the original Siemens S7-200, including communication via RS-485 (PPI/MPI).

Can it be combined with original Siemens EM modules?

Yes, the expansion bus is identical to the original S7-200, series, so original and replacement modules can be combined in one assembly.

Why buy a replacement instead of an original Siemens part?

Siemens S7-200 has been out of production (EOP) for a long time and original parts are only sold as refurbished or remaining stock at a considerably higher price – the replacement solves servicing of existing installations at a reasonable price and with availability from stock.