M-8S - MERIT SERIES PowER CondITIonER • EnGLISH
5
Remote Interface
The M-8S has a remote interface which can be used
to control the M-8S remotely using a Furman RS-1
(Maintained) or RS-2 (Momentary) wall switches. In
the most basic, single unit configuration, only two
wires and a switch are required to initiate a remote
ON or OFF sequence. The switch may be either a
momentary or maintained-contact type. If a third &
fourth wire are available, an LED “Status Light” can
be installed at the remote switching location to indi-
cate the status of the M-8S. The pins on the remote
interface are described below:
PIN 2 STATUS (Output)
The STAT (status) terminal is an output that may be
used to activate an LED to indicate the status of the
M-8S. If the STAT terminal is high, the M-8S Delay
outlets are either ON, or are in the process of se-
quencing ON. If the STAT terminal is low, the M-8S
Delay outlets are OFF. To use the STAT terminal out-
put simply connect an LED between the STAT and
GND with the Cathode (flat) side of the LED oriented
toward the GND pin (Pin #4). Do not use a series cur-
rent limiting resistor. If the LED does not light when
the remote switch is ON, check the polarity of the
LED and reverse the leads if necessary.
• If the LED is OFF, the DELAY outputs are OFF
• If the LED is ON, the DELAY outputs are ON
• If the LED is blinking, the DELAY 1, 2 or 3 outputs
are in transition either from ON to OFF or
OFF to ON
PIN 3 REMOTE (Input)
The REM (remote) terminal is provided to allow re-
motely connected devices to sequence the M-8S ON
or OFF. The M-8S’ REM terminal has been designed
to work with voltages from 5 to 30VDC. Filtering has
been added to this input to prevent false-triggering.
The behavior of the M-8S is controlled by the com-
bination of the signal presented at the REM terminal
input, and the arrangement of the rear panel DIP
switches. Please refer to REAR PANEL DIP SWITCH
section (page 6) for more details.
PIN 4 GND (Power)
The GND (ground) terminal pin serves a ground ref-
erence point for all other pins on the Remote Inter-
face. GND can also be fed back into the REM pin
(Pin #3) to activate the sequence when the M-8S has
been configured for GND ON mode. Please note that
the GND terminal on the Remote Interface is not the
same as chassis ground and should never be con-
nected to chassis ground.
DELAY 1
AC˜
220-240V
50/60Hz
10A MAX
POWER
DELAY 3
REMOTE PORT
12V STAT REM GND
12V ON
12V OFF
GND
ON
MOM
MNT
DLY
ADJ
1 2 3
12V 0.5A
1
3
2
AC˜
220-240V
50/60Hz
10A MAX
SWITCHED
DELAY 2
Remote Interface
Pin
Label
Description
1
12V
12VDC @12mA General
Purpose Output
2
STAT
Output for driving an external
status LED
3
REM Input for controlling the
sequencer remotely
4
GND Ground (12VDC Power
Common)
Remote Interface
PIN 1 +12VDC (12VDC Voltage Source)
The +12VDC terminal pin is a general purpose,
12VDC voltage source relative to the GND (#4) pin. It
is provided to allow the user to control the operation
of the sequencer by feeding the +12VDC signal back
into the REM terminal input; which is pin #3 on the
same barrier strip.
1 2 3 4
REAR PANEL FEATURES (continued)
