Hardware manual

12
CONNECTING PAGE INPUT
The PAGE input connections are the same as the AUDIO INPUT connections. Please refer to the previous page for
connector pinout.
CONNECTING THE RLY/TRG IN
The RLY/TRG IN connector is a two-pin terminal block connector. When using this input for a switch-closure (or
opening) event, the two terminals should be connected to the switch contacts directly. This type of event
detection can be used with relay contacts as well.
If used with a logic-type device, the low-end of the logic connection should be connected to the minus (–
) terminal and the active-end should be connected to the plus (+) terminal. This input is compatible
with TTL & CMOS logic family devices. For the defined limits of input to this connector, please refer to
the specification section.
TIP- This input can be used to switch between stand-alone preset operating modes without the need of a computer.
Set-up for this feature is available through RS-232 or Telnet communications.
CONNECTING THE RLY OUT
The RLY OUT connector provides access to the internal relay’s contacts for remotely controlling an external low voltage device or circuit. This internal relay is rated for
70V (DC or ACrms), 250 mA (switched) and is isolated from ground. There is one common terminal, one normally-closed contact terminal and one normally-open con-
tact terminal. These are labelled as C, NC and NO on the rear panel. When the relay is not energized, the C terminal is connected to the NC terminal and the NO termi-
nal is not connected; when the relay is energized the C to NC connection is opened and the C to NO connection is closed.
CONNECTING THE MONITOR CHAIN IN/OUT
The MONITOR CHAIN connector is a 5-pin terminal block connector. The center pin is the shield connection for both the input and output of the monitor chain. Note
also that the positive terminal of the input and output connections are on the outer pins of this connector.
ATTENTION! DO NOT CONNECT VOLTAGES EXCEEDING 70 VOLTS (DC or AC rms) TO THE RLY OUT CONNECTOR! DAMAGE TO THE CM16a
COULD RESULT OR CREATE HAZARDOUS OPERATING CONDITIONS! If there is a need to switch higher voltage or current levels with the
CM16a, contact Technical Services for suggested solutions.
CONNECTION TO 10BASE-T (NETWORK CONNECTION)
Connection to the Ethernet network is made using the RJ-45 type connector labelled 10BASE-T on the rear panel.“RJ-45”
is the standard network connector for Ethernet networks. Insert the RJ-45 plug into the receptacle with the lock-tab ori-
ented toward the bottom of the CM16a and push firmly until the connector locks into place (usually an audible “click” can
be heard). Refer to Section 1 of this manual for Ethernet connection schemes and cabling. If the CM16a is connected
directly to the system controller computer’s network interface card, a crossover type cable is required. All other con-
nection methods utilize normal Ethernet cabling.
CONNECTING TO THE RS-232 PORT
Connection is made with a null-modem serial cable with a DB-9 male plug to the CM16a. The RS-232 port can be used for setting various operational parameters that
are CRITICAL to proper operation of the CM16a. The network address settings can be changed through this port. Do Not Change the Network Address unless you are
certain of what you are doing! Refer to Section 3 (page 27) for more information.
CONNECTING TO 2-CHANNEL AMPLIFIERS
2-channel amplifiers require a cable connection from the amp’s DataPort to the appropriate PORT receptacle on the CM16a. These HD-15 type connectors are labelled
PORT A through PORT H. Use standard 15 pin VGA monitor cables (the same type of cable that interconnects PC’s & monitors).
To connect the cable to the CM16a, orient the HD-15 connector with its wider-side down (look at the connector, one side of the plug’s metal surrounding is wider than
the other) and align it with the receptacle, then gently push into the receptacle until it is firmly seated. Use the retaining screws on the cable ends to secure the plug
to the CM16a and the amplifier. Tighten “finger tight” to avoid damage to the HD-15 receptacle. The same basic procedure applies for connecting the other end of the
cable to the amplifier’s DataPort.
CONNECTING TO 4-CHANNEL AMPLIFIERS
Two basic rules must be adhered to: First, both DataPorts of the amplifier must be used. Second, both must be connected to the same CM16a.
If only one DataPort connection is used, the CM16a will not control or monitor the amplifier correctly (the same applies for connecting the two amplifier DataPorts to
two separate CM16a’s; the system will not function properly). Insure that both amplifier DataPorts are used and that they are connected to the same CM16a. You do
not have to use adjacent ports on the CM16a (i.e. PORT C and PORT D). You can use any two ports for convenience; the only impact of doing this is that the System
Manager software control panel will not show all four channels next to each other.