MoSen-SR Installation Guide

Supplementary Motion Sensor (Standard Range) For Alec Zone Controller

After you have unpacked the MoSen-SR you should see the items as shown in Figure 1. Measuring only 3cm(L) x 3cm (W) x 1.25cm(H) (1.2"x1.2"x0.5"), a MoSen-SR sensor occupies very little space and is barely noticeable after it has been installed.

Figure 1

Description

The MoSen-SR is an optional, supplementary motion sensor that can be used to extend the sensing range of the built-in motion sensor on Alec ZC001/ZC002 for applications that involve a large lighting zone to be controlled by a single controller.

The Alec ZC001 and ZC002's built-in motion sensor has a maximum detection range of 16.5 ft (5m), but has a field of view angle of 41^o from the center line. So if the ceiling height is h and h < h_max, then the horizontal limit r of the built-in motion sensor from the center line is r = h*tan(41^o) = 0.87h and the coverage area = π*r² as shown in the following diagram:

Figure 2

if h > h_max then the detection angle will be narrower due to the maximum of 16.5ft linear limit.

E.g. if h = 9 ft, r = 7.8 ft then the sensor covers a circular area of nearly 200 ft² around the ZC001. The following table gives you a quick reference of the coverage area of the Alec-ZC001 / ZC002 for different ceiling heights.

Figure 3

If you are designing a lighting zone that requires motion sensing and the zone is larger than the coverage area of the built-motion sensor, you can add one or more MoSen-SR to expand the zone coverage. A MoSen-SR (SR stands for "Standard Range") uses the same motion sensor as the built-in sensor on Alec-ZC001/ZC002 and therefore the calculation of the coverage area is the same as shown in Figure 2 & 3.

Notes:

1. As many MoSen-SR as needed can be wired in parallel to an Alec-ZC001/ZC002 controller, offering excellent flexibility in how you may want to configure the zones to maximize energy saving or to minimizing costs.
2. In offices that setup tall cubicles around its workstations, the cubicle walls may block the sensor from sensing all the occupants. In such cases you could add a MoSen-SR above each cubicle to ensure that all occupants in the lighting zone will be adequately covered.
3. MoSen-SR can be added anytime, even after a project has already been installed and is in operation.
4. If you need to install sensors on a ceiling that is higher than 12.5 ft then you should consider using the MoSen-LR (LR stands for "Long Range") which is designed for high bay lightings and has a detection range of up to 40 ft (12m).

Installation Instructions

MoSen-SR is supplied with a 4m (13 ft) long, plenum-rated (CMP) cable certifed to UL/CSA FT6 rating, allowing it to be safely run along the plenum space above the ceiling, and adhere to the strictest building code in North America.

A piece of 1" x 1" square, 3M double-sided foam tape is included in the package that allows the small and light-weight MoSen-SR to be easily adhered to the T-bar structure of a suspended ceiling, or adhered to a solid ceilings directly. First, peel the backing paper of the foam tape and paste the foam tape onto the back of the MoSen-SR. When you have selected the position to install the MoSen-SR, remove the other backing paper of the foam tape and press the MoSen-SR onto the location you want to install it.

Figure 4

The very thin wires attached to the body of the Mosen-SR can pass through the gap between the T-bar and the ceiling tile inconspicously. If MoSen-SR is to be installed on a solid ceiling you can drill a small 4mm diameter hole and insert the wires into the hole, then cover the hole with the body of MoSen-SR.

Figure 5

Wiring Instructions

There are 3 wires on the MoSen-SR - Red (V+), Black (0V) and White (signal). MoSen-SR can be powered by 5V to 15VDC applied to the red (V+) and black (0V) wires. The white wire is the signal output from MoSen and together with the black wire it forms an active low input to be connected to the Alec ZC001/ZC002 auxiliary sensor input (IN2) to provide additional occupancy sensing signals.

As each MoSen-SR consumes < 5mA when activated, it can be powered directly from the 12V and 0V terminal on the low voltage control I/O terminal on the Alec ZC001 as shown in Figure 6 (A).

1. Connect: Red wire to +12V wire on ZC001
2. Connect: Black wire to 0V wire on ZC001
3. Connect: White wire to IN2 wire on ZC001

Figure 6

You can connect as many MoSen-SR that is needed to a single ZC001 or ZC002 controller. The output signal wires (white & black) of all the MoSen-SR will be connected in parallel to the zone controller.

Note that If you are connecting more than 4 MoSen-SR to a single ZC001/ZC002, then you should use an external 5V to 15V DC power supply module to supply power to all the MoSen-SR. In this case the black wires of all the MoSen-SR will need to be connected both to the external power supply as well as the 0V terminal on the Alec ZC001/ZC002, as shown on Figure 6(B).

Operating Instructions

When a MoSen-SR detected motion (occupancy) it's signal output (white wire) will alert the AlecZC001 that occupants have been detected and to take action according to the program schedule.

There is a green LED indicator on each MoSen-SR and it will light up only when it has detected motion. Note that the MoSen-SR was designed so that the green LED indicator is not affected by the active signal outputs from the other MoSen-SR that may be wired in parallel. Meaning, each MoSen-SR will only indicate detection by its own sensor. However, the Alec controller will not be able to determine the particular MoSen-SR that detected motion, only that motion was detected within the zone.