Operator Manual
Page
8
of
40
P/N 1580281
SEC3120 Digital Transmitter
Sensor Electronics Corporation
Rev 10, 20150707
TB 4
– MAIN
(1) +24 VDC
(2) 4-20 mA SENSOR 1
(3) DC COMMON
(4) RS485 DATA B
(5) RS485 DATA A
(6) ISOLATED COMMON
(7) 4-20 mA SENSOR 2
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
TB 1-RELAY
SENSOR ELECTRONICS CORPORATION
12730 CREEK VIEW AVE
SAVAGE, MINNESOTA 55378
(T) 952.938.9486 (F) 952.938.9617
TB 2-SENSOR 1
TB 3-SENSOR 2
Figure 1
BACK VIEW OF SEC3120
SEC3120 WIRING
