Siemens 6ES7522-1BH00-0AB0 Digital Output Module, DQ16, MSO
Siemens S7-1500 digital output module, 6ES7522-1BH00-0AB0, DQ 16x24VDC/0.5A ST, transistor outputs, MSO, short-circuit protection, 35 mm width.
Specifications
| Parameter | Value |
|---|---|
| Digital outputs | 16 |
| Output type | Transistor |
| Parameter | Value |
|---|---|
| Rated value (DC) | 24 V |
| Output current, resistive load, max. | 100 Hz |
| Output current at signal "1" (rated) | 0.5 A |
| Output current, max. per circuit / per module | 0.5 A |
| Total output current per module, max. | 8 A; see additional description in the manual |
| Permissible range, upper limit (DC) | 28.8 V |
| Permissible range, lower limit (DC) | 20.4 V |
| Output voltage at signal "1" (min.) | L+ (-0.8 V) |
| Residual current at signal "0", max. | 0.5 mA |
| Power dissipation (typ.) | 2 W |
| Inductive shutdown voltage clamp | L+ (-53 V) |
| Load resistance, upper limit | 12 kΩ |
| Load resistance, lower limit | 48 Ω |
| Isolation between channels | No |
| Isolation between channels and backplane bus | Yes |
| Isolation, channels in groups of | 8 |
| Isolation test voltage | 707 V DC (type test) |
| Parameter | Value |
|---|---|
| Short-circuit protection | Yes; Clocked electronically |
| Reverse polarity protection | Yes; through internal protection with 7 A per group |
| Diagnostics function | Yes |
| Diagnostic alarm | Yes |
| Short-circuit response threshold (typ.) | 1 A |
| Short-circuit detection | Yes |
| Wire-break detection | No |
| Redundant load control | Yes |
| Output can drive a digital input | Yes |
| Parameter | Value |
|---|---|
| Output switching delay 0 to 1, max. | 100 µs |
| Output switching delay 1 to 0, max. | 500 µs |
| Switching frequency, inductive load, max. | 0.5 Hz; According to IEC 60947-5-1, DC-13 |
| Switching frequency, lamp load, max. | 10 Hz |
| Parameter | Value |
|---|---|
| Cable length, unshielded, max. | 600 m |
| Cable length, shielded, max. | 1 000 m |
| Width | 35 mm |
| Height | 147 mm |
| Depth | 129 mm |
| Weight (approx.) | 230 g |
Product details
Frequently asked questions
Does 6ES7522-1BH00-0AB0 have short-circuit protection?
Yes, short-circuit protection is built in, with a typical response threshold of 1 A per channel. The module also reports diagnostic alarms and shows fault status via red LEDs.
What this module does on the S7-1500 rack
The 6ES7522-1BH00-0AB0 is a 16-channel transistor digital output module for the Siemens S7-1500 system. It sinks 0.5 A per channel at 24 VDC, with a per-group maximum of 4 A and a module total of 8 A — the group limit governs real-world loading when several outputs fire simultaneously. MSO (isochronous mode) is supported, meaning the output update is synchronised to the PROFINET cycle — essential for applications that need deterministic switching, such as high-speed pick-and-place or cam-controlled motion. Short-circuit protection is built in, with a response threshold of 1 A typical per channel. The module also reports diagnostic alarms and channel status via green and red LEDs, so a faulted output is visible at the rack without a handheld tool.
Switching performance and wiring constraints
The output turns on in 100 µs max and off in 500 µs max — fast enough for most sequencing but not for PWM or high-frequency lamp loads (rated 10 Hz max on lamp load). Unshielded cable runs up to 600 m; shielded up to 1 000 m. The load resistance range for signal "1" is 48 Ω to 12 kΩ — stay inside that window or the module may not recognise the load as valid. All 16 outputs share a common reference — no channel-to-channel isolation.
Firmware version V2.0.0 is factory-loaded. The module supports I&M data (I&M0 to I&M3) and prioritised startup, so it fits into a standard S7-1500 configuration without a firmware update for most projects.
Panel fit and mechanical integration
Width is 35 mm — one standard S7-1500 slot. Depth 129 mm, height 147 mm. The module snaps onto the DIN rail and connects to the backplane bus via the U-connector; no wiring to the backplane itself.