Interactive model: Enkel Boks 6 Par
Try Enkel Boks 6 Par yourself: see what happens to the lock, hold-open magnet, night lock and door operator with a card, in a fire, at night and on emergency release.
Enkel boks 6 par Relay logic · K1–K5 · terminals 1–40
Without JavaScript the model shows its default state and the controls do not work. The ‘Scenarios’ table further down shows the state for each scenario.
Controls
From access control
At the door
Installation
The board does not change: 21 carries +24 V while K5 is off, 23 while K5 is on. This choice says where the lock is wired. Fail-safe is locked with power, fail-secure is locked without power. The difference shows on fire and KAC.
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- live / closed circuit
- path ready: K2 released, outdoor switch armed
- ±24 V supply
- de-energised / open
- external device
- alarm (v2)
State
| EL-LOCK | LOCKED |
|---|---|
| Night lock | RELEASED |
| Hold magnet 40 | HOLDING |
| Door operator 34–35 | — |
| REX to ACS 5–6 | — |
| Outdoor switch | blocked |
| Door | closed |
Interactive model of the Enkel boks 6 par relay logic. Patent pending. © Teren AS
Scenarios
What the box does in each scenario, calculated by the same relay logic as the model above. A relay is energised when its coil is powered.
| Scenario | Input | Mode | Energised relays | Lock on 21 (NC, fail-safe) | Lock on 23 (NO, fail-secure) | Night lock | Hold magnet 40 | Door operator 34–35 | Outdoor switch |
|---|---|---|---|---|---|---|---|---|---|
| Normal | No button pressed | NORMAL | K1 K2 | LOCKED | LOCKED | RELEASED | HOLDING | — | blocked |
| Card | Card / Lock (terminal 9) | ACCESS GRANTED | K1 K5 | RELEASED | RELEASED | RELEASED | HOLDING | — | enabled |
| REX exit | REX exit button (17–18). ACS answered REX: Lock signal on terminal 9 (same as a card) | ACCESS GRANTED | K1 K5 | RELEASED | RELEASED | RELEASED | HOLDING | — | enabled |
| Indoor elbow | Indoor elbow switch (19–20). ACS answered REX: Lock signal on terminal 9 (same as a card) | ACCESS GRANTED | K1 K4 K5 | RELEASED | RELEASED | RELEASED | HOLDING | COMMAND | enabled |
| Outdoor elbow | Outdoor elbow switch (32–33) | NORMAL | K1 K2 | LOCKED | LOCKED | RELEASED | HOLDING | — | blocked |
| Card + outdoor | Card / Lock (terminal 9) and outdoor elbow switch (32–33) | ACCESS GRANTED | K1 K5 | RELEASED | RELEASED | RELEASED | HOLDING | COMMAND | enabled |
| Night lock | Night lock on (terminal 10) | NIGHT LOCK | K1 K2 K3 | LOCKED | LOCKED | LOCKED | HOLDING | — | blocked |
| FIRE | No power on terminal 8 | FIRE | — | RELEASED | LOCKED | RELEASED | RELEASED | — | enabled |
| KAC release | KAC emergency release pressed (30–31) | KAC RELEASE | — | RELEASED | LOCKED | RELEASED | RELEASED | — | enabled |
Relays K1–K5
- K1 Fire (V23079). Coil: terminal 8 → board 0 V. Contacts 4·9 → 5·8 give +24 V to the lock (via K5) and hold magnet 40.
- K2 Fire/AGA. Coil is fed from the fire line through K5 contact 21→22. Set 1 drives night lock 38–39, set 2 gates the outdoor elbow switch (32 → 35).
- K3 Night lock. Coil straight from terminal 10. Parallel with K2 in loop 38–39: both must be energised to lock the night lock.
- K4 REX. Coil sits on +24 V via F2 and pulls in when elbow switch 19–20 connects its minus to −24 V via F1. Set 1: REX to ACS (6 → 5). Set 2: door operator (35 → 34).
- K5 Lock (Schrack RT42). Coil: terminal 9. Set 11/12/14 moves +24 V between 21 (NC) and 23 (NO). Set 21/22 cuts the coil of K2.
Modes
- NORMAL
Door is locked. K1 and K2 are energised. The outdoor elbow switch is blocked by K2. A card or REX opens the door.
- ACCESS GRANTED
Lock signal on terminal 9: K5 energised and moved +24 V from 21 to 23. K5 also cut the coil supply of K2, so K2 dropped — the outdoor elbow switch works and the night lock is released.
REX does not touch K2 — the button only reaches the ACS on 5–6. The ACS answered with the Lock signal on terminal 9, the same output as for a card. So K5 pulled in, K2 dropped, and the outdoor elbow switch is enabled while the signal lasts.
- NIGHT LOCK
Night lock: K3 and K2 are both energised, so loop 38–39 is open and the night lock is locked. A card drops K2 and so releases the night lock.
- FIRE
Fire: terminal 8 is dead. K1 dropped and removed +24 V from the lock and the hold magnet. K2 dropped too, so both elbow switches open the door and the night lock is released. K3 stays energised — that is correct, K2 alone releases the night lock.
The model shows a night lock on constant 24 V (terminal 37). On exterior doors that must stay locked during fire, the night lock is fed from fire-controlled 24 V (terminal 40): it then stays locked, and the door is opened mechanically.
- KAC RELEASE
KAC emergency release: loop 30–31 is open and the board's 0 V is gone. K1, K2, K3 and K5 drop together and the lock loses its return on 22. The indoor elbow switch still works, because K4 returns through 19–20.
The model shows a night lock on constant 24 V (terminal 37). If the night lock is fed from fire-controlled 24 V (terminal 40), it also stays locked on KAC.
- NO POWER
No power on terminals 1–4. All relays dropped.
A fail-secure lock on 23 gets no power on fire or KAC and stays locked. Use 21 for escape doors.