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COMPATIBILITY
THE SIGMA RS485 MODBUS NETWORK USES A 4 WIRE CABLE BASED ON A STANDARD TELEPHONE
CABLE. THE PINOUT HAS BEEN SELECTED SO THAT IT CLOSELY MATCHES THE COLORING ON THE
SIGMA SUBMERSIBLE CABLE. THIS NETWORK IS NOT COMPATIBLE, NOR SHOULD IT BE CONNECTED
TO SIGMA MVNET RS485 CONNECTIONS OR LEGACY MP SENSORS. MUST BE USED WITH MYRIAD
FIRMWARE VERSION 3.0 AND UP
ALARM CODE
0 – ALARMS CLEARED
1 – HIGH
2 – LOW
3 – FAIL TO RUN #1
4 – FAIL TO RUN #2
5 – CRITICAL ALM #1
6 – CRITICAL ALM #2
7 – SEAL LEAK
8 – SENSOR FAIL
9 – BACKUP ACTIVATED
10– SEAL LEAK P1 ALARM
11 – SEAL LEAK P2 ALARM
12 – HIGH FLOAT ALARM
COMMUNICATION SETTINGS
19200 BAUD [FIXED]
8 DATA BITS [FIXED]
1 STOP BIT [FIXED]
NO PARITY [FIXED]
MODBUS ID (NODE) IS SET TO 5 AT THE FACTORY. IT IS SELECTABLE FROM THE SETUP
MENU
NOTE: MYRIAD MUST BE ORDERED WITH RJ45 MODBUS CONNECTOR
CABLING
RED = +24VDC (OPTIONAL), BLACK = -24VDC / COMMON, GREEN = + RS485, YELLOW = -RS485
PIN 4 = (-) RS485
PIN 5 = (+) RS485
PIN 7 = (+) 24VDC (NOT USED)
PIN 4 = (-) 24VDC
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