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TB 3-SENSOR 2
TB 1-RELAY
TB 1 – RELAYS
(12) FAULT (N.E) N.C.
(11) FAULT (N.E.) COMMON (10) FAULT (N.E) N.O.
(9) HIGH ALARM N.C.
(8) HIGH ALARM COMMON (7) HIGH ALARM N.O.
(6) MID ALARM N.C.
(5) MID ALARM COMMON (4) MID ALARM N.O.
(3) LOW ALARM N.C.
(2) LOW ALARM COMMON (1) LOW ALARM N.O.
NC = NORMALLY CLOSED NO = NORMALLY OPEN
TB 2 – SENSOR 1
(1) WHITE (DATA/CAL) (2) BLUE OR GREEN
(4-20 mA)
(3) RED (+24 VDC) (4) BLACK
(DC COMMON)
TB 3 – SENSOR 2
(1) WHITE (DATA/CAL) (2) BLUE OR GREEN
(4-20 mA)
(3) RED (+24 VDC) (4) BLACK
(DC COMMON)
TB 4 – MAIN
(1) +24 VDC
(2) 4-20 mA SENSOR 2 (3) DC COMMON
(4) RS485 DATA B
(5) RS485 DATA A
(6) ISOLATED COMMON (7) 4-20 mA SENSOR 1
SENSOR ELECTRONICS CORPORATION 29730 CREEK VIEW AVE SAVAGE, MINNESOTA 55378
(T) 952.938.9486 (F) 952.938.9617 sales@sensorelectronics.com
TB 2-SENSOR 1
TB 4 – MAIN
Figure 1
BACK VIEW OF SEC3120
SEC3120 WIRING
Operator Manual Page 8 of 40 P/N 1580281 SEC3120 Digital Transmitter Sensor Electronics Corporation Rev 10, 20150707
