DE5712
1
RL
RL
RL
RL-8
-8
-8
-8
8-Relay Output Adapter for the MCR-308
Installation Instructions
1
11
1. INTRODUCTION
. INTRODUCTION
. INTRODUCTION
. INTRODUCTION
The RL-8 is an ”open collector to dry contact” adapter, designed
as an interface unit between the outputs of the MCR-308 wireless
receiver and alarm control panels or remote controlled devices.
Similarly, the RL-8 can serve as a suitable output interface for
other electronic security devices that have open-collector outputs.
The benefit offered by the RL-8 is the ability to overcome features
imposed by open collector outputs - the current limit and the
“pull-to-ground” action - both of which are undesirable in certain
applications.
The 8 on-board relays of the RL-8, with normally open (N.O.)
contacts, can control up to 8 zones of an alarm control panel, or 8
different electronic devices, or a combination of both.
When activated by PowerCode messages, open collector outputs
of the MCR-308 energize the associated relays on the RL-8
board. The relay contacts close, thus closing the circuit into which
they are wired (see Figure 1).
Operating power for the RL-8 is obtained from the same source
that supplies input voltage to the MCR-308. The RL-8 is sold as a
”bare” module, but can be housed in the MCR-308 casing, next to
the MCR-308 printed circuit board (see Section 3).
Figure 1
. Typical Remote Control Configuration with RL-8
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22
2. SPECIFICATIONS
. SPECIFICATIONS
. SPECIFICATIONS
. SPECIFICATIONS
Number of Relays:
8
Relay Coil Impedance:
2500 Ohms
Relay Contact Ratings:
Form 1A (N.O.), 1A max. / 30 V
Input Voltage Range:
10.5 - 16 VDC
Current Drain:
5 mA per relay @ 12 VDC
Operating Temperatures:
-10
°
to 50
°
C (14
°
to 122
°
F)
Storage Temperatures:
-20
°
to 60
°
C (-4
°
to 140
°
F)
Module Dimensions:
92 x 67 x 15 mm (3-5/8 x 2-5/8 x 19/32 in.)
Weight:
86 g (3 oz)
3
33
3. INSTALLATION
. INSTALLATION
. INSTALLATION
. INSTALLATION
3.1 Mechanical Mounting
The RL-8 module may be mounted in any host cabinet, provided
that 6 mm (1/4”) clearance is left between the bottom surface of
the printed circuit board and the cabinet wall. This is easily
achieved by using cylindrical plastic bushings as spacers through
which mounting screws are inserted.
It is sometimes preferable to mount the RL-8 in the MCR-308
case (see Figure 2). If this is done, the RL-8 will be protected by
the same tamper switch used to protect the MCR-308. Open the
MCR-308 case as shown in the MCR-308 installation instructions,
and
clip off the 2 plastic standoffs indicated in Figure 2
.
Figure 2
. Standoffs to be Clipped Off before Installing the RL-8
After that, place the RL-8 as shown in Figure 3 and attach it to
the upper standoffs with two screws.
Figure 3.
RL-8 Installed within the MCR-308 Casing
3.2 Wiring
Each relay operating coil in the RL-8 is permanently connected to
the
12V
terminal of the unit. Applying 12 VDC (+) to the
12V
terminal therefore maintains one end of each coil at 12 V (+)
potential. Each relay will be energized if the other end of its coil is
grounded through the appropriate input. If wiring is completed as
in Figure 4, and provided that the MCR-308 outputs are defined
as normally open (N.O.), the other end of the coil will be pulled to
ground by the respective open-collector output of the MCR-308.
