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Siemens 6ES7331-7RD00-0AB0 — Analog Input Modules

Siemens 6ES7331-7RD00-0AB0 S7-300 AI 4x20mA Ex(i), EOL

MPN6ES7331-7RD00-0AB0

End of Life

Siemens S7-300, 6ES7331-7RD00-0AB0, 4 AI current-only Ex(i) module, 24 V DC, 60 °C max, end-of-life.

$381.00 – $984.00Ref. price · indicative, final on quote

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Siemens 6ES7331-7RD00-0AB0 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7331-7RD00-0AB0 — Inputs & Signal Ranges
Parameter	Value
Number of analog inputs	4
Current input range	Yes
Voltage input range	No
Resistance measuring ranges	No
RTD support (resistance thermometer)	No
Thermocouple support (types)	No
Input range: 0 to 20 mA	Yes
Input range: 4 to 20 mA	Yes
Current measurement: 2-wire transducer	Yes
Current measurement: 4-wire transducer	Yes
Input resistance (0 to 20 mA)	50 Ω
Input resistance (4 to 20 mA)	50 Ω
Permissible input current, max. (destruction limit)	40 mA
Max. shielded signal cable length	200 m

6ES7331-7RD00-0AB0 — Measurement Performance
Parameter	Value
Resolution (bit incl. sign), max.	16 bit; 10 bit to 15 bit + sign
Current measurement error (±)	0.1 %
Interference voltage suppression (at interference frequency)	10 to 400 Hz

6ES7331-7RD00-0AB0 — Diagnostics & Monitoring
Parameter	Value
Diagnostics function	Yes

6ES7331-7RD00-0AB0 — Isolation
Parameter	Value
Isolation: channels to backplane bus	Yes
Isolation: between channels	Yes

6ES7331-7RD00-0AB0 — Power
Parameter	Value
Rated value (DC)	24 V
Power loss, typ.	3 W
Reverse polarity protection	Yes

6ES7331-7RD00-0AB0 — Mechanical
Parameter	Value
Required front connector	20-pin
Width	40 mm
Height	125 mm
Depth	120 mm
Weight, approx.	290 g

Product details

Integration Notes

Mounts a single S7-300 width (40 mm) on the DIN rail. Requires a 20-pin front connector (not included) for field wiring. Shielded cable run is limited to 200 m for 4-20 mA loops; exceeds that spec and signal integrity drops. Input resistance is 50 Ω on both 0–20 mA and 4–20 mA ranges. Wire-break detection and group error (SF red LED) are built in. The module is reverse-polarity protected and electrically isolated between channels and backplane bus. Maximum no-load voltage (Uo) is 25.2 V, short-circuit current (Io) is 68.5 mA, and permissible external capacitance (Co) is 90 nF — stay within these limits for the Ex(i) entity parameters.