Product Overview
The SK-3523-SDQ is a stand-alone keypad, meaning the programming, user codes, and relay control are handled at the keypad itself instead of through a separate networked access-control panel. In gate work, it can be wired to a compatible gate operator open input, access relay, telephone entry relay, or external control circuit, as long as the receiving circuit is low voltage and matches the keypad relay output. The two relay outputs are useful when one code group needs to open a gate and another needs to operate a pedestrian door, auxiliary relay, or second controlled point. It should not be confused with SECO-LARMs newer 1,010-user SK-1323 or SK-2323 families, or keypad/proximity models that add card-reader functions.
Compatible With
- Automatic gate operator access inputs that accept a dry contact keypad relay
- Pedestrian door strikes, maglocks, access-control relays, and compatible low-voltage release circuits
- Commercial, industrial, and residential access points needing stand-alone code control
- Applications needing two relay outputs from one keypad
- 12~24 VAC/VDC systems within keypad specifications
- Related SECO-LARM keypad families: SK-1323-SDQ, SK-2323-SDQ, SK-1123-SDQ; verify user capacity, relay rating, mounting, and programming before substituting
Features & Specifications
| Manufacturer | SECO-LARM |
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| Product Type | Heavy-duty stand-alone access keypad |
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| Part Number | SK-3523-SDQ |
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| Application | Code access for gates, doors, locks, and relay-controlled entry |
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| User Capacity | Up to 210 user codes |
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| Operating Voltage | 12~24 VAC/VDC |
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| Relay Outputs | Two Form C relay outputs |
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| Relay Timing | Programmable 1~99 seconds or toggle in common references |
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| Mounting | Surface mount |
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| Construction | Heavy-duty stainless-steel faceplate with coated steel backing |
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| Notes | Stand-alone keypad; not a network access controller |
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Also Known As / Related Part Numbers
- SK-3523-SDQ
- SK3523SDQ
- SK-3523
- SECO-LARM SK-3523-SDQ
- Enforcer SK-3523-SDQ
- Heavy-duty stand-alone keypad
- 210 user keypad
- 2 relay output keypad
- SK-1323-SDQ related weatherproof keypad
- SK-2323-SDQ related mullion keypad
- SK-1123-SDQ related vandal-resistant keypad
Technician Note
When replacing an access keypad, document which relay wires are used before removing the old unit. Many gate and door systems use only one relay, but the second relay may control a pedestrian door, alarm shunt, or auxiliary device.
Before Ordering Checklist
- Confirm the existing keypad model and mounting footprint.
- Verify 12~24 VAC/VDC power.
- Check whether one or both relays are used.
- Confirm relay timing, toggle mode, and user-code length requirements.
- Back up or document user codes before replacing an operating keypad when possible.
Professional Advisory
Access keypad wiring should remain low voltage. For electric locks, maglocks, gate operators, or life-safety egress circuits, use a qualified access-control or gate technician and maintain all required safety and egress hardware.
Product Questions
How many users does the SK-3523-SDQ support?
The SK-3523-SDQ is commonly listed for up to 210 user codes.
Can this keypad open a gate?
Yes, it can trigger a compatible gate operator access input through a relay output when wired correctly.
Does it have two relays?
Yes. It has two Form C relay outputs, which can be used for separate controlled functions when the installation supports it.
No. SK-1323-SDQ is a different SECO-LARM keypad family with different capacity and specifications. Match the exact keypad requirements before substituting.
Can I wire this directly to high voltage?
No. The keypad should be used with compatible low-voltage power and relay/control circuits. High-voltage or life-safety wiring should be handled by a qualified technician.
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