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Siemens 6AG1321-1BH02-2AA0 — Digital Input Modules

Siemens 6AG1321-1BH02-2AA0 SIPLUS SM 321, 16 DI, 24 VDC

MPN6AG1321-1BH02-2AA0

Siemens SIPLUS S7-1200 SM 321 digital input module, 16 channels at 24 VDC, extended temperature range -40 to 70 °C, UL/CE/EN 50155, order code 6AG1321-1BH02-2AA0.

$254.00 – $697.00Ref. price · indicative, final on quote
Siemens 6AG1321-1BH02-2AA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1321-1BH02-2AA0 — Inputs
ParameterValue
Number of digital inputs16
Max. inputs, up to 40 °C16
Max. inputs, up to 60 °C16; 16 @ > 60 °C
2-wire sensor supportYes
6AG1321-1BH02-2AA0 — Electrical
ParameterValue
Rated value (DC)24 V
Input voltage at signal "1"13 to 30V
Input voltage type (AC/DC)DC
Input voltage at signal "0"-30 to +5 V
Permissible range, lower limit (DC)20.4 V
Permissible range, upper limit (DC)28.8 V
Input current at signal "1" (typ.)7 mA
Power loss (typ.)3.5 W
Current consumption from backplane bus (5 V DC), max.10 mA
Permissible quiescent current, 2-wire sensor, max.1.5 mA
Cable length, unshielded, max.600 m
Cable length, shielded, max.1 000 m
6AG1321-1BH02-2AA0 — Timing
ParameterValue
Input delay 0 to 1, min.1.2 ms
Input delay 1 to 0, min.1.2 ms
Input delay 0 to 1, max.4.8 ms
Input delay 1 to 0, max.4.8 ms
Input delay, parameterizable valuesNo
6AG1321-1BH02-2AA0 — Diagnostics & Isolation
ParameterValue
Diagnostics functionNo
Diagnostic alarmNo
Hardware interrupt supportNo
Isolation between channelsNo
Isolation between channels and backplane busYes; Optocoupler
Isolation test voltage500 V DC
Channels per isolated group16
Status indicator per channel (green)Yes
6AG1321-1BH02-2AA0 — Mechanical
ParameterValue
Depth120 mm
Height125 mm
Width40 mm

Product details

The 6AG1321-1BH02-2AA0 is a 16-channel digital input module at 24 VDC in a 40 mm slice. It is a basic DI – no diagnostic alarms, no parameterization, no hardware interrupt – so the slot is reserved for standard binary field signals.

Footprint for the panel layout

Isolation is tested with 500 VDC between the field side and the backplane, consistent with a basic DI of this class.

Frequently asked questions

What compliance does Siemens provide for this part?

The recorded bundle covers CE mark, UL under file E239877, KC approval, EAC, RCM and EN 50155 railway certification to sections 4, 5 and 12 (T1, Category 1, Class A/B, EN 50155:2007, SIOS entry 109755985) – enough to satisfy a North American panel build and a rail-side tender from the same order code.

MPN
6AG1321-1BH02-2AA0