The Siemens 6ES7288-3AM06-0AA0 is an analog mixed I/O module for the S7-200 SMART family. It gives you four analog inputs and two analog outputs, each configurable for voltage (0..10 V, 0..5 V, ±5 V, ±2.5 V) or current (0/4..20 mA). Resolution is 12 bits in voltage mode, 11 bits in 4..20 mA mode — enough for most process signals without overspecing. Supply voltage is 24 VDC with a -15/+20 % tolerance, so it'll hold steady even if your panel supply drifts. Power draw is a modest 2.0 W; the backplane takes another 80 mA at 5 V. That leaves headroom for additional modules in the rack. CE marked, IP20 rated — standard for a clean control cabinet. Onboard diagnostics and wire break detection on the current inputs save you a trip with the multimeter when a sensor drops out.
Mounting and wiring in the field
Parameterization is done in four stages (1x, 4x, 16x, 32x cycle time) via software. You can mix voltage and current channels per the wiring diagram, but the module cannot be reparameterized while running — set it up offline before commissioning.