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Schneider Electric SR3B261FUSP002 — Digital Output Modules

Schneider Zelio Logic SR3B261FUSP002 Smart Relay, 16 AC Inpu

MPNSR3B261FUSP002
Obsolete

Schneider Electric Zelio Logic modular smart relay, SR3B261FUSP002, 16 discrete AC inputs (100–240 V), built-in real-time clock, cycle time 6…90 ms.

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

Specifications

SR3B261FUSP002 key specifications
ParameterValue
Protection typeAgainst inversion of terminals (control instructions not executed)
Range of productZelio Logic
Product or component typeModular smart relay
Isolation voltage1780 V
Supply voltage limits85...264 V
Discrete input voltage100...240 V AC
Supply voltage100...240 V
Voltage state 0 guaranteed= 0.17 mA (discrete input)
Voltage state 1 guaranteed>= 79 V for discrete input
[Uimp] rated impulse withstand voltage4 kV conforming to EN/IEC 60947-1 and EN/IEC 60664-1
Discrete input current0.6 mA
Maximum supply current100 mA at 100 V (without extension) 50 mA at 240 V (without extension) 60 mA at 240 V (with extensions) 80 mA at 100 V (with extensions)

All specifications

SR3B261FUSP002 additional specifications
ParameterValue
Current state 0 guaranteed= 10 mA at 12 V (relay output)
Power consumption in12 VA without extension 17 VA with extensions
Supply frequency50/60 Hz
Operating rate in0.1 Hz (at Ie) for relay output 10 Hz (no load) for relay output
Discrete input frequency57...63 Hz 47...53 Hz
IP degree of protectionIP20 (terminal block) conforming to IEC 60529 IP40 (front panel) conforming to IEC 60529
Connections - terminalsScrew terminals, 1 x 0.2...1 x 2.5 mm² (AWG 25...AWG 14) semi-solid Screw terminals, 1 x 0.2...1 x 2.5 mm² (AWG 25...AWG 14) solid Screw terminals, 1 x 0.25...1 x 2.5 mm² (AWG 24...AWG 14) flexible with cable end Screw terminals, 2 x 0.2...2 x 1.5 mm² (AWG 24...AWG 16) solid Screw terminals, 2 x 0.25...2 x 0.75 mm² (AWG 24...AWG 18) flexible with cable end
Response time50 ms with ladder programming (from state 0 to state 1) for discrete input 50 ms with ladder programming (from state 1 to state 0) for discrete input 50...255 ms with FBD programming (from state 0 to state 1) for discrete input 50...255 ms with FBD programming (from state 1 to state 0) for discrete input 10 ms (from state 0 to state 1) for relay output 5 ms (from state 1 to state 0) for relay output
Pollution degree2 conforming to EN/IEC 61131-2
Relative humidity95 % without condensation or dripping water
Operating altitude2000 m
Maximum altitude transport3048 m
Mechanical durability10000000 cycles for relay output
StandardsEN/IEC 61000-4-3 EN/IEC 61000-4-6 level 3 EN/IEC 60068-2-27 Ea EN/IEC 61000-4-4 level 3 EN/IEC 61000-4-5 EN/IEC 61000-4-12 EN/IEC 60068-2-6 Fc EN/IEC 61000-4-2 level 3 EN/IEC 61000-4-11
ClockWith
ChecksProgram memory on each power up
Cycle time6...90 ms
Backup time10 years at 25 °C
Clock drift12 min/year at 0...55 °C 6 s/month at 25 °C
Local displayWith
Tightening torque0.5 N.m
Overvoltage categoryIII conforming to EN/IEC 60664-1
Discrete input number16
Immunity to microbreaks10 ms
Environmental characteristicEMC directive conforming to EN/IEC 61000-6-2 EMC directive conforming to EN/IEC 61000-6-3 EMC directive conforming to EN/IEC 61000-6-4 EMC directive conforming to EN/IEC 61131-2 zone B Low voltage directive conforming to EN/IEC 61131-2
Disturbance radiated (conducted)Class B conforming to EN 55022-11 group 1
Number or control scheme lines0...500 with FBD programming 0...240 with ladder programming
Ambient air temperature for storage-40...70 °C
Ambient air temperature for operation-20...40 °C in non-ventilated enclosure conforming to IEC 60068-2-1 and IEC 60068-2-2 -20...55 °C conforming to IEC 60068-2-1 and IEC 60068-2-2

Product details

Key Features That Matter for Fit

The SR3B261FUSP002: Built-in real-time clock with 10-year backup at 25 °C, drift of 6 s/month at 25 °C (12 min/year over 0…55 °C). That means it holds time through power loss and is usable for time-controlled sequences without an external RTC module. Checks program memory on each power up — no silent corruption when the line bounces. If the program is bad, it won't run, which beats a mystery fault later. 16 discrete inputs, 100…240 V AC. Supply voltage 85…264 V AC. Input current 0.6 mA. Relay outputs: mechanical durability 10 million cycles. Maximum switching rate 0.1 Hz at rated current, 10 Hz unloaded. That's fine for valve or contactor coils; don't plan on fast pulse trains.

Where It Fits – And Where It Doesn't

This is the 16-input, relay-output workhorse for standalone or networked small machines. The cycle time runs 6…90 ms — ladder runs faster than FBD. Good for bin-fill, pump sequencing, or lighting schedules. Not a motion controller; you want a PLC for servo loops.

Frequently asked questions

What is the real-time clock specification?

The SR3B261FUSP002 includes a built-in clock with a backup time of 10 years at 25 °C. Clock drift is 6 seconds per month at 25 °C, or 12 minutes per year across the full 0…55 °C operating range.

Does it check program memory on startup?

Yes, it performs a program memory check on each power up. This ensures the stored program is valid before the relay begins operating.

What compliance documentation is available?

The unit meets EN/IEC 61000-6-2 and EN/IEC 61000-6-3 (EMC), EN/IEC 61131-2 (low voltage directive), and is marked for environmental conformity with RoHS and REACH via Schneider's declaration. Specific certificates can be requested with the RFQ.

MPN
SR3B261FUSP002