Siemens SIMATIC S7-1200 analog I/O module SM 1234, 4 voltage inputs, 4 outputs, 24 V DC, diagnostic alarms, integrating measurement.
| Parameter | Value |
|---|---|
| Analog inputs | 4 |
| Parameter | Value |
|---|---|
| Rated value (DC) | 24 V |
| Power loss (typ.) | 1.1 W |
| Short-circuit protection | Yes; per module, electronic to frame |
| Reverse polarity protection | Yes; against destruction |
| Isolation test voltage | 500 V DC |
| Isolation: between channels | No |
| Isolation: channels to backplane bus | Yes |
| Max. cable length, shielded | 30 m |
| Parameter | Value |
|---|---|
| Resolution incl. overrange (bit, with sign), max. | 15 bit; at ±10 V, at ±5 V; 14 bit at 0 to 10 V, at 1 to 5 V |
| Parameterizable | Yes |
| Diagnostic alarm | Yes; Parameterizable |
| Diagnostics function | Yes |
| Group fault indicator (SF, red LED) | Yes |
| Parameter | Value |
|---|---|
| Height | 130 mm |
| Width | 45 mm |
| Depth | 35 mm |
| Weight (approx.) | 150 g |
The 6ES7144-4FF00-0AB0: Rated 24 V DC, draws 1.1 W typical from backplane and up to 45 mA from supply. Input resistance 100 kΩ. Cycle time 267 ms; suited for slow processes. Diagnostics and group error SF LED included.
Dimensions: 45 mm wide, 130 mm high, 35 mm deep. Spring-cage terminals. Shielded cable up to 30 m. Isolation tested at 500 V DC between inputs and MANA; no channel-to-channel isolation; common-mode voltage stay within 5 Vpp. Reverse polarity protection built in.
The module has a width of 45 mm, a height of 130 mm, and a depth of 35 mm, consistent with standard S7-1200 form factor.
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