A 24 VDC commoned input module designed for high point density and fail-safe behavior. Model 3564 uses a single architecture with triplicated safety-critical portions, optically isolated points and automatic testing for stuck-ON and stuck-OFF conditions.
64 COMMONED INPUTS
15-30 VDC RECOMMENDED RANGE
< 2 ms ON / OFF DELAY
1.5 kV POINT ISOLATION
How the 3564 Input Path Works
Field signal conditioning, state recognition and safe reporting
FIELD SIDE
24 VDC Discrete Signals
Recommended range 15-30 VDC, 36 VDC maximum, with 2-3 mA nominal turn-on current and input impedance above 3.0 kohm.
01
STATE WINDOW
Threshold & Hysteresis
OFF-to-ON is 12 V typical and 15 V worst case. ON-to-OFF is 8 V typical and 6 V worst case, giving about 4 V typical hysteresis.
02
CONTROLLER SIDE
Fail-Safe Reporting
Continuous tests detect stuck states. When an input fault is found, the affected point is reported OFF to the control program.
Response: less than 2 ms from OFF-to-ON and ON-to-OFF.
Logic load: less than 10 watts, with individual input state indication and PASS / FAULT / ACTIVE / POWER status.
24V
Planning a 3564 Replacement?
Send the chassis version, termination identity, quantity and destination for an availability and compatibility response.
Strength: high density and safe fault response at lower system cost.
Tradeoff: lower availability than a fully triplicated input module.
Hot spare: changeover can briefly report an input OFF.
COMPARE
3504E
TMR / 64 POINTS / 24 OR 48 VDC
Strength: triplicated critical paths for higher input availability.
Difference: selectable voltage, impedance and timing are not the same as 3564.
Decision: migration requires an engineering and termination review.
Also compare 3505E carefully: it is a TMR 24 VDC low-threshold input with a different point count and threshold profile, so similar voltage labeling does not establish interchangeability.
Amikon's Large Stock Is the Core of Our Supply
Multilingual Support Customer coordination and structured order tracking.
Stock-Driven Response Coverage for current and mature equipment.
Our industrial product range serves customers worldwide. Market insight and strategic purchasing support rapid availability checks. If an item is not on hand, we search our preferred supplier network. Fast coordination helps reduce production interruption, with no additional handling or hidden charges.
ENGINEERING INQUIRY
Confirm the Exact 3564 Configuration
Share the module label, field voltage, termination, spare arrangement and required quantity.
Return support: Contact us within seven days after receipt if a problem occurs. Keep the item in its original condition and state the return reason. A return or replacement can be arranged after the item arrives and is checked. Return freight is paid by the buyer.
PURCHASE DECISIONS
3564 Buyer FAQ
01
Is 3564 a fully TMR input module? No. It is a single fail-safe module; only the circuitry required for safe operation is triplicated.
02
Can 3564 be replaced by 3504E without engineering changes? No. Architecture, voltage selection, impedance, timing and termination conditions differ.
03
What field voltage should be used with 3564? The recommended range is 15-30 VDC, with 36 VDC as the maximum value.
04
What happens when 3564 detects an input fault? The affected point is reported OFF. A hot-spare changeover can also create a brief OFF report that the control strategy must tolerate.
05
What should be checked before ordering 3564? Confirm the exact model, 64-point commoned termination, field voltage, hot-spare arrangement and acceptable availability level.