Nexus 1252 - Electrical Installation and Output Modules; Installing Optional Output Modules; 4-Wire WYE Wiring Configurations

Doc# E107754 V.1.03 QS - 3
Nexus® 1252 Meter Quickstart
Electro Industries/GaugeTech
™
Powered by Innovation™
Installing Optional Output Modules:
1. Secure the mounting brackets to the Output module using the supplied screws (#440 pan-head screws).
2. Secure the brackets to a flat surface using a #8 screw with a lock washer.
• Six feet of RS485 cable harness is supplied. Connect the Output module’s Male RS485 Side Port to connect
to the meter’s Port 4 or to another module’s Male RS485 side port.
• If multiple Output modules are connected together, secure a mounting bracket to both ends of the group.
(See figure below.) Connect multiple Output modules by connecting the Male RS485 port on one module to
the Female RS485 port on the next module. See the meter’s Installation and Operation Manual for
additional information (see page QS-1 for the download link).
Electrical Installation:
Following are some of the possible wiring configurations. See the Nexus® 1250/1252 Meter
Installation and Operation Manual for additional configurations (see page QS-1).
Mounting Brackets (MBIO)
Male RS485
Side Port
Female RS485
Side Port
I/O Port
(Size and Pin
Configuration Vary)
Reset Button
LEDs
!
DANGER
On
L(+)
Power Supply
PSIO
Max Power: 12 VA
Input Voltage: 12-60V DC
www.electroind.com
Output Voltage: 12V DC
ElectroIndustries/GaugeTech
90-240V AC/DC
N(-)
Power In
RESET
COM
INPUT 1
INPUT 2
INPUT 3
INPUT 4
0-1mA
Analog Input
Module
INPUT 5
INPUT 6
INPUT 7
INPUT 8
RESET
COM
INPUT 1
INPUT 2
INPUT 3
INPUT 4
0-1mA
Analog Input
Module
INPUT 5
INPUT 6
INPUT 7
INPUT 8
RESET
COM
OUT 1
OUT 2
OUT 3
OUT 4
TX
RX
CT
0-1mA
Analog Output
Module
RX
RX
CT
CT
TX
TX
4-wire, 3 element WYE with 3 PTs and 4 CTs 4-wire, 3 element WYE with Direct Voltage and 4 CTs