SYSTEM CONNECTION
(a) Using a Model 280/281 Power Supply
For worry-free installation, we recommend using a Memco Model 280 or 281 power supply. This provides a
regulated DC supply for the detectors and a “clean-contact” relay to re-open the lift doors.
1. Position the Model 280/281 in an appropriate place. Ensure both RX and TX cables will reach.
2. Connect the 618 TX cable as shown in Fig 5. Connect the 618 RX cable as shown in Fig 5.
5. Secure the cables with the P-clips and No 8x12mm
self-tapping screws provided. Ensure the cables are
securely held, there are no tight bends and they are
not stressed or stretched as the doors move.
6. Screw the earth wire ring tag to the lift door using
the No 8 screw and shakeproof washer provided.
(b) Static Installation
The 618 can be mounted to the car using the static fixing kit (Figs 2, 3, 4). This fixing kit must be ordered
separately (Part No 616 800-010).
1. Fix each detector to a long vertical bracket using the M3.5 nuts, bolts and washers provided.
2. Fix the sill bracket to the sill of the lift car using the M6 or M8 nuts, bolts and washers provided. Ensure
the detectors will be positioned no more than 4m (14 ft) apart.
3. Insert the tongue of the vertical bracket into the sill bracket (Fig 3).
4. Use the ‘L’ brackets to fix the tops of the vertical brackets to an appropriate fixing on the lift car (Fig 4).
Ensure the detectors are aligned vertical and straight with each other.
3. Connect the “door re-open” input of the lift controller or door operator. The Model 280/281 provides “clean”
relay contacts as follows:-
’COM’ = common
‘N/C’ = normally closed
‘N/O’ = normally open
4. Connect the power supply:
•Model 280 - connect 230V AC/115V AC. (check the selector switch!)
•Model 281 - connect 15-35V DC
Important:
Do not shorten Memco cables by cutting them. (Different wire colours may be used inside).
Only use Memco cable between the RX/TX detectors and the Model 280/281.
Ensure cables are kept away from AC mains or high voltages.
Be very careful not to confuse wire colours in the dim light of the lift shaft.
‘Timeout’ Option - Normally the timeout option is enabled by connecting the yellow wire to the ‘+12V’
terminal as shown in Fig 5. If desired it can be disabled by connecting the yellow wire instead to the
‘0V’ terminal.
Fig 3: Static Installation -
Sill Bracket
Fig 4: Top Bracket
Fixing
