Installation User guide
Installation, cont’d
MLC 226 IP Series • Installation
2-10
PRELIMINARY
These relays are normally open by default.
They will return to an open state if power is
removed from the controller. They can be
confi gured via SIS commands or the Global
Confi gurator (GC) software to
operate as follows:
• on—relay closes and stays closed
until otherwise instructed
• off—relay opens and stays open
until otherwise instructed
• toggle—relay changes from open
to closed or from closed to
open until otherwise instructed
• pulse—momentary (timed) (press
to turn on, timeout to turn off)
On (Closed)
Common
Off (Open)
Common
Relay On
Relay Off
On (Closed)
Common
Off (Open)
Common
Relay Toggle
or
Toggle off
Toggle on
On (Closed)
Common
Off (Open)
Common
Relay Pulse
Turn off after
a set period
Off (Open)
Common
Tur n
on
You can also use SIS commands or the GC software to specify pulse duration.
Via the GC software, each relay can be associated with a front panel button or
it can be operated independently.
d
IR/Serial Output ports — Depending on how the MLC is confi gured,
these ports output either infrared signals or unidirectional RS-232 signals
for controlling various devices such as VCRs and DVD players. Before it
can be used for controlling a device, each port must be set up via Global
Confi gurator software for either IR or RS-232 communication and associated
with a device driver.
For RS-232 output (-5 VDC to +5 VDC), use the illustration below as a wiring
guide, then wire a serial cable into this captive screw connector.
RS-232 default protocol:
• 9600 baud
• no parity
• 8 data bits
• 1 stop bit
• no fl ow control
N
Maximum distances from the MLC to the device being controlled may vary
up to 200 feet (61 m). Factors such as cable gauge, baud rates, environment,
and output levels (from the MLC and the device being controlled) all affect
transmission distance. Distances of about 50 feet (15 m) are typically not a
problem. In some cases the MLC may be capable of transmitting and controlling
a given device via RS-232 up to 250 feet (76 m) away.
Common
Relay 5
Relay 6
To / from
control
equipment
Normally
Open (5)
Common
Normally
Open (6)
Common
1 2
COMMON
COMMON
COMMON
A
RELAYS
3 4
B
5 6
C
All relays
are
normally
open.
Common
Relay 5
Relay 6
To / from
control
equipment
Normally
Open (5)
Common
Normally
Open (6)
Common
1 2
COMMON
COMMON
COMMON
A
RELAYS
3 4
B
5 6
C
All relays
are
normally
open.
To a
Controllable
Device
Ground
Signal (Tx)
50'
(15.2 m)
(See note.)
GROUND
Tx/IR
Tx/IR
Tx/IR
GROUND
GROUND
IR/SERIAL OUT
A BC
To a
Controllable
Device
Ground
Signal (Tx)
50'
(15.2 m)
(See note.)
GROUND
Tx/IR
Tx/IR
Tx/IR
GROUND
GROUND
IR/SERIAL OUT
A BC