QUADLOGIC QCom Meter Data Hub With Enclosure
BACK VIEW
8""
10""
1
2
""
1
1
2
""
7.0"
7.0"
SIDE VIEW
2
1
2
"
1
1
8
"
7
8
"
1
1
8
"
1
3
8
"
1
5
8
"
10"
4"
TOP VIEW
4"
8
1
2
"
7
8
"
1
1
8
"
1
1
8
"
1
3
8
"
QCom METERING WIRING CONNECTIONS AND DIMENSIONS
Detail
12
Front View
QUADLOGIC QCom NOTES AND
SPECIFICATIONS:
1. THE QCom HAS THREE HALF DUPLEX (2 WIRE) RS-485
MODBUS PORTS.
2. QCom MAY HAVE A MAXIMUM 480 METERING POINTS
SHARED ACROSS THE THREE RS-485 PORTS TOTALING
APPROXIMATELY (80 QBrick, 80 QLIC, 20 miniQloset24, OR
30 miniQloset16 METERS).
3. FOR HARDWIRED SYSTEMS, A RS-485 REPEATER MUST
BE INSTALLED AFTER EVERY 16TH DEVICE TO BOOST
THE COMMUNICATION SIGNAL ACROSS THE BUS.
4. ALL METERS AND REPEATERS MUST BE DAISY CHAINED
TOGETHER ON THEIR RESPECTIVE RS-485 BUS.
PREFERRED INSTALLATION GUIDELINES FOR
2W RS-485 BUS :
· USE #22 AWG SHIELDED TWISTED PAIR WIRE OR
LARGER WITH A RUN NO LONGER THAN 3000 FEET.
· WIRE OPTIONS INCLUDE:
·· 2-WIRE, NO SIGNAL GROUND: BELDEN 3105A OR
EQUIVALENT.
·· 2-WIRE, WITH SIGNAL GROUND: BELDEN 3106A OR
EQUIVALENT.
· #24 AWG CAN BE USED BUT SHOULD ONLY BE LIMITED
TO A MAX RUN OF 2000 FEET.
· CAT-5 CABLE CAN ONLY BE USED FOR RUNS UNDER 500
FEET IN A LOW ELECTRICAL NOISE ENVIRONMENT.
· CONNECT ALL SHIELDS TOGETHER THROUGHOUT THE
RUN. CONNECT THE SHIELD TO THE SYSTEM GROUND
AT ONLY A SINGLE POINT ON A SINGLE RS485
NETWORK.
PERFORMANCE RECOMMENDATIONS FOR
CABLES RUN OVER 3000 FEET OR LONGER:
· FOR BUS LENGTHS OVER 3000 FEET, THE CABLE MUST
HAVE A CHARACTERISTIC IMPEDANCE OF 120Ω OR
TERMINATED WITH A 120Ω RESISTOR AND BIAS
INSTALLED. NOTE THAT THIS STEP CAN BE DONE LAST,
AND ONLY IF TESTING INDICATES THAT IT IS
NECESSARY.
· THE RS485 BUS MUST HAVE A DIFFERENTIAL VOLTAGE
OF AT LEAST 200mV WHEN NO UNITS ARE
TRANSMITTING.
· IF AN EXTERNAL BIAS SUPPLY IS REQUIRED, ADD A
5VDC POWER SUPPLY CONNECTED TO THE DATA LINES.
EACH LEAD FROM THE POWER SUPPLY (POSITIVE AND
NEGATIVE) SHOULD HAVE A 470Ω RESISTOR IN SERIES
CONNECTED TO IT.
· IF THE GROUND IS CONNECTED TO PREVENT NOISE,
THE CABLE USED MUST HAVE AN ADDITIONAL
CONDUCTOR. IT IS NOT CORRECT TO USE THE SHIELD
IN ORDER TO INTERCONNECT THE SIGNAL GROUNDS
OF THE DEVICES. INSTEAD, THE CABLE USED MUST
PROVIDE AN ADDITIONAL SEPARATE CONDUCTOR
WHICH IS CONNECTED TO SIGNAL GROUND AT EACH
DEVICE. NOTE THAT THE SHIELD SHOULD BE
CONNECTED TO THE GROUND AT ONLY ONE POINT, SO
THE SHIELD IS NOT APPROPRIATE AS THE SIGNAL
GROUND CONNECTION.
G
_
+
G
_
+
G
_
+
Modbus 1Modbus 2Modbus 3
RS-485 to
Meter(s) or
QRadio
V+V-
N L
CAT5E
For
Internet
RF ANTENNA
3/4" 1/2"
CONDUIT ENTRY
120VAC to
24VDC
Converter
4A Fuse
8
3
8
" 8"
1'-4
5
16
"
10"
10
1
4
"
A B
C
N
A B
C
N
120VAC
10A Fused
Disconnect
QCom DATA COLLECTOR DETAILS
DRAWING IS BASED ON ELECTRICAL & MECHANICAL DRAWINGS PREPARED BY:
REVISIONS
THESE DRAWINGS ARE THE PROPERTY OF METERGY SOLUTIONS &
SHALL BE RETURNED UPON REQUEST:
30-30 47th Avenue, Suite 540, Long Island City, NY, 11101
TITLE:
PROJECT:
DRAWN BY:
GL NO.:
SCALE:
DATE:
No. DATE DESCRIPTION BY
DRAWING NO.:
ELECTRICITY SUB-METERS
COMMON AREA METER SCHEDULE
RESIDENTIAL
301
2024-09-05
1 2024.09.24 INITIAL DRAFT RL
21154
ASHRAE
350
TEST SITE
43-14 QUEENS STREET
LONG ISLAND CITY, NY 11101
..\In Progress\122 East 144 St Bronx\METERGY LOGO.PNG
METERGY SOLUTIONS
N.T.S.
MSI-E-09
