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Section 2: Installation- Connections
REAR PANEL- PAGE, RELAY & MONITOR CONNECTIONS
20
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 nor-
mally-open contact terminal. These are labeled 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
terminal is not
connected; when the relay is energized the
C
to
NC
connection
is opened and the
C
to
NO
connection is closed.
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 connec-
tor. 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 de-
vices. For the defined limits of input to this connector , please
refer to the specification section.
CONNECTING THE MONITOR CHAIN IN/OUT
The
MONITOR CHAIN
connector is a 5-pin terminal block con-
nector. 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.
TIP- This input can be used to switch between
stand-alone preset operating modes without the
need of a computer. Setup for this feature is avail-
able through RS-232 or Telnet communications.