Apartment, Multifamily & Rental Property Access Control
Apartment building access control hardware: anti-clone readers with matched fob sets, QR visitor codes, 4G controllers for rentals and UHF tags for gates.
ValenID · valenid.com · sales@valenid.com
SK-140 IP67 Waterproof Metal Access Control Keypad
All-metal IP67 keypad controller with 5,000 users, a short-circuit-protected lock relay and Wiegand output. Reads 125 kHz EM or 13.56 MHz MIFARE at 3–5 cm.
- IP67 rating with an all-metal panel and metal keys for exposed entrances
- 5,000 users with card, PIN or card + PIN access
- 3–5 cm read range: 125 kHz EM or 13.56 MHz MIFARE/NTAG UIDs
- Short-circuit-protected relay output; door open time 0–99 s
- Wiegand D0/D1 or TXD/RXD serial on DIP-selectable leads
- Frequency
- 125 kHz or 13.56 MHz (by variant)
- User capacity
- 5,000 users
- IP rating
- IP67
- Read range
- 3–5 cm
- Power
- 12 V DC ±5%, ≤ 200 mA
- Dimensions
- 120 × 86 × 22.3 mm
Reply within 24 hours Tested before dispatch Worldwide shipping
IP67 Waterproof Metal Access Control Keypad: overview
The SK-140 is a standalone access control keypad for exposed doors and pedestrian gates. Both the front panel and the keys are metal, which resists scratches and wear and wipes clean easily, and the unit carries an IP67 rating. It stores 5,000 users and releases the lock through its own relay after a valid card, PIN or card plus PIN.
The SK-140-E reads 125 kHz EM4100, EM4102 and EM4200-compatible cards and fobs; the SK-140-M reads UIDs from 13.56 MHz MIFARE Classic, MIFARE Plus, MIFARE DESFire, MIFARE Ultralight and NTAG2xx credentials. Read distance is 3–5 cm, and the reader is designed to cope with interference from its own metal enclosure.
Each user can hold an independent PIN, and a configurable security level is available. The illuminated keypad helps at night. Alarms cover door-sensor events and tampering, and the harness adds alarm, exit-button and doorbell connections. The relay output is short-circuit protected with a response under 100 µs, door open time adjusts from 0 to 99 s, and users can be copied to another keypad or managed from a PC.
Integration notes
The 13-lead harness includes Wiegand D0/D1 on the green and white leads (or TXD/RXD serial, set by DIP switches 5 and 6), so the SK-140 can also report to an existing controller. Operating temperature is –10 to +50 °C; for colder sites, compare the SK-120. Enrollment steps are in our keypad programming guide.
More features
- Illuminated keypad, independent PINs, user copy and PC user management
SK-140 specifications
RF & credentials
| Frequency | 125 kHz (SK-140-E) or 13.56 MHz (SK-140-M) |
|---|---|
| 125 kHz credentials | EM4100, EM4102 and EM4200-compatible cards and key fobs (thick, thin and fob formats) |
| 13.56 MHz credentials | MIFARE Classic Mini/EV1, MIFARE Plus S/X, MIFARE DESFire EV1/EV2/EV3/Light, MIFARE Ultralight/Ultralight C/Ultralight EV1, NTAG2xx (UID read) |
| Read range | 3–5 cm (depends on credential and installation) |
Access control
| User capacity | 5,000 users |
|---|---|
| Access modes | Card, PIN, card + PIN |
| Door open time | 0–99 s, adjustable |
| User management | Management cards (add / delete), independent PINs, user copy, PC user management |
| Alarms | Door sensor, tamper |
| Other functions | Security level setting, doorbell interface |
Interfaces & wiring
| Lock output | Relay, NO / COM / NC contacts |
|---|---|
| Data output | Wiegand D0/D1 or TXD/RXD serial, selected by DIP switches 5 and 6 |
| Inputs | Door sensor (SEN), exit button (BUT) |
| Other leads | Alarm linkage (AL), auxiliary (AUX+), doorbell (BELL+ / BELL–) |
| Harness | 13 color-coded leads |
Electrical
| Supply voltage | 12 V DC ±5% |
|---|---|
| Operating current | ≤ 200 mA |
| Standby current | ≤ 150 mA |
| Output short-circuit protection | < 100 µs response |
Mechanical & environment
| Housing | All-metal panel and metal keys, illuminated |
|---|---|
| Protection | IP67 |
| Dimensions | 120 × 86 × 22.3 mm (±0.3 mm) |
| Operating temperature | –10 to +50 °C |
| Storage temperature | –20 to +60 °C |
| Humidity | 20–80% RH |
Variant matrix
| Variant | Frequency | Credentials | Read range |
|---|---|---|---|
| SK-140-E | 125 kHz | EM4100 / EM4102 / EM4200 cards and fobs | 3–5 cm |
| SK-140-M | 13.56 MHz | MIFARE Classic, Plus, DESFire, Ultralight, NTAG2xx (UID) | 3–5 cm |
Wiring (13 color-coded leads)
| Wire color | Label | Function |
|---|---|---|
| Red | +12 V | Power, 12 V DC |
| Black | GND | Ground |
| Yellow | NC | Relay, normally closed |
| Pink | COM | Relay common |
| Blue | NO | Relay, normally open |
| Light blue | SEN / LED | Door sensor input / LED line |
| Gray | BUT / BEEP | Exit button input / BEEP line |
| Orange | AL | Alarm linkage |
| Light green | AUX+ | Auxiliary linkage |
| Purple | BELL+ | Doorbell |
| Brown | BELL– | Doorbell |
| Green | WD0 / RXD | Wiegand D0 or serial RXD (DIP 5, 6) |
| White | WD1 / TXD | Wiegand D1 or serial TXD (DIP 5, 6) |
Green and white leads carry Wiegand or serial data depending on DIP switches 5 and 6.
Specifications can change between production batches. Confirm the current revision with us before placing volume orders.
Ordering options
Quote the SKU that matches your frequency, interface and mounting. Not sure? Send us your controller model and we will pick the variant for you.
| SKU | Configuration | Actions |
|---|---|---|
| SK-140-E | 125 kHz EM4100/EM4200-compatible IP67 all-metal keypad | |
| SK-140-M | 13.56 MHz MIFARE/NTAG UID IP67 all-metal keypad |
Where the SK-140 is used
- Unsheltered pedestrian gate at a residential compound or car park
- Exterior service door on a warehouse or utility building
- 24/7 gym street entrance with members using PINs or fobs
- Keypad reporting to an existing controller over Wiegand at a perimeter door
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SK-140 FAQ
What does the IP67 rating mean for installation?
IP67 means the unit is dust-tight and protected against temporary immersion. Still route the cable so water cannot run down it into the entry point.
What temperature range does the SK-140 handle?
It operates from –10 to +50 °C and can be stored from –20 to +60 °C. For sites that regularly drop below –10 °C, the IP65 SK-120 is specified down to –20 °C.
Can I connect it to an existing access controller?
Yes. With DIP switches 5 and 6 set for Wiegand, the green lead carries D0 and the white lead D1.
Which cards does it accept?
The SK-140-E reads 125 kHz EM4100, EM4102 and EM4200-compatible cards and fobs. The SK-140-M reads UIDs from MIFARE Classic, Plus, DESFire, Ultralight and NTAG2xx credentials.
Before you buy
Related buyer guides
Wiegand vs OSDP vs RS485: Which Reader Interface Should You Specify?
Compare Wiegand, OSDP and RS485 reader interfaces: wiring, cable limits, AES-128 Secure Channel and steps for a compatible access-control migration.
Magnetic Lock Wiring Diagrams: Maglock, Exit Button, Power Supply and Reader
Maglock wiring with dry-relay COM/NC: keypad and reader diagrams, REX signals, approved egress release paths and manufacturer-specific suppression.
Fail-Safe vs Fail-Secure Locks: How to Choose for Each Door
A fail-safe lock releases when power is cut; a fail-secure lock stays locked. Learn which to use per door, how to wire NO/NC, and what egress codes expect.
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Get pricing for the SK-140
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