Installation Instructions

DE4050 1
MCX
MCXMCX
MCX-8
-8-8
-8
8-Output Expander for the MCR-308 Receiver
Installation Instructions
1
11
1. INTRODUCTION
. INTRODUCTION. INTRODUCTION
. INTRODUCTION
1.1 General Description
The MCX-8 is an 8-output expander unit especially designed to
increase the number of outputs of the MCR-308 PowerCode
wireless receiver.
Up to three MCX-8 expanders, with 8 outputs each, can be
connected to the MCR-308 (see Figure 1). The expanders
communicate with the receiver via a 4-wire power/data bus.
Figure 1. Full System Configuration - MCR-308 with 3 Expanders
Each expander is identified by a factory programmed 8-bit ID
number. This ID must be registered in a specific memory location
of the MCR-308 to which the expander is connected (see
Publication DE3191-).
The communication link between the MCX-8 and MCR-308
receiver is continuously monitored (every 5 seconds) by the
MCR-308 receiver. In case of communication failure, the inactivity
output of the receiver will be activated.
1.2 Construction and Packaging
The MCX-8 printed circuit board is enclosed in a plastic cabinet
that facilitates installation on a flat surface and protects the unit
against tampering. The cabinet can be separated into two parts:
the cover and the base (see Figure 2). Disassembly instructions
are given in Para. 3.1.
Figure 2. Plastic Cabinet
The base can accommodate a single MCX-8 module (Figure 3) or
two side-by-side MCX-8’s (Figure 4) or an MCR-308 receiver unit
alongside the MCX-8 (Figure 5). Various mounting and wiring
knockouts are provided (see
Fig
.
3).
Tamper protection is accomplished with an on-board tamper
switch, actuated upon removal of the front cover (Figure 6). If two
units are installed in the same cabinet, only one tamper switch is
used (the one of the unit to the right).
Important! You must bridge the two TAMP terminals of the left-
mounted MCX-8, but be sure to do it only after having
conducted a “teaching” session (as instructed in the MCR-308
manual, Publication DE3191-).
Figure 3. Single MCX-8 Unit within its Cabinet
Figure 4. Two MCX-8 units Sharing the Same Cabinet
Figure 5. MCR-308 and MCX-8 Sharing the Same Cabinet