World Headquarters
621 Hunt Valley Circle
New Kensington, PA 15068 USA
Phone: 724-334-5000 • Fax: 724-334-5001
Toll Free: 1-800-736-4666
Website: www.MyBacharach.com
E-mail: [email protected]
5: WIRING
1: Strip 0.2 to 0.25 inches (5 to 7 mm) of wiring
insulation.
2: Connect the wires as indicated.
RELAY 1 NC
RELAY 1 C
RELAY 1 NO
RELAY 2 NC
RELAY 2 C
RELAY 2 NO
RELAY 3 NC
RELAY 3 C
RELAY 3 NO
10
11
12
13
14
15
16
17
18
Relay 1 Output
Relay 2 Output
Relay 3 Output
FUNCTION
PIN
LABEL
SHIELD WIRE WARNING: Con-
nect the shield of the power
wires to the earth ground of the
central control system (e.g.,
chassis, ground bus bar, etc.).
NOTE: For connections to an external controller
such as a Bacharach MGS or GDA, refer to the
manual that was included with the controller.
NOTE: For 24 VDC installations,
the input is protected. If the
polarity is reversed, the instru-
ment will not power-up.
POLARITY WARNING: For 24 VAC installations
in a daisy-chain configuration, the neutral polari-
ty must be maintained for all instruments.
WARNING: The MGS-550 must be
powered by either (a) a suitable UL
60950/CSA certified power supply
that is isolated from line voltage by
double insulation, or (b) an appro-
priately rated UL listed/CSA Class 2
transformer. Failure to comply can
result in personal injury or death.
M20 OPENINGS: The ABS and the
flame proof/explosion proof enclosures
provide four M20 openings for cable
glands or plugs. These openings can be
used for field wiring, direct attachment
of a sensor or wiring of a remote sensor.
Unused openings must be closed with a
suitable plug and gasket, maintaining
the IP or Ex d rating.
114A Georges Street Lower
Dun Laoghaire • Co Dublin • Ireland
Phone: +353 1 284 6388 • Fax: +353 1 284 6389
PIN 10
PIN 18
PIN 9
PIN 1
Connector Style
May Vary Slightly
from Photo
NOTE: To make wiring connections,
you must first open the MGS-550
housing. The enclosure lid of the
IP66 ABS housing has four captive
screws. The enclosure lid of the Ex d
(flame proof/explosion proof) hous-
ing unscrews.
Next, carefully discon-
nect the combination
Display Bezel and
Processor Board (which
remain connected)
from the lower Inter-
face Board by unscrew-
ing the 3 captive
screws. Access the
captive screws through
holes in the Display
Bezel.
Internal
Display Bezel
(Top Layer)
Processor
Board
(Middle Layer)
with Keyed
Ribbon Cable
Interface Board
(Bottom Layer)
NOTE: After wiring is completed, carefully re-as-
semble the enclosure and its components, noting
the keyed ribbon cable and sensor connectors.
After installation is complete, be sure to refer to
the User Manual
(part number 1100-1000) for
detailed instructions on registering the sensors and
configuring the MGS-550 for proper operation.
PWR
GND
24VAC
PWR GND
24VAC
AC
PO
WER
PWR
GND
24VAC
PWR
GND
24VAC
PWR
GND
24VAC
PWR
GND
24VAC
PWR GND
24VAC
SUPPLY
TRANSFORMER
4-Wire Power and Output to
Central Control System
3-Wire Power and Output to
Central Control System
mA
A OUT 1
A1 GND
PWR GND
+24VDC
-
+
mA
A OUT 1
PWR GND
+24VDC
-
+
Refer to the
User Manual (part number 1100-1000)
for detailed instructions on accessing the internal
components for wiring.
+24VDC/AC
PWR GND
ANALOG 1 GND
ANALOG OUT 1
ANALOG 2 GND
ANALOG OUT 2
RS-485 GND
A
B
1
2
3
4
5
6
7
8
9
Power
(+24VDC or 24VAC)
Analog Output 1
Analog Output 2
Modbus RTU
FUNCTION
PIN
LABEL
