Connecting I Nputs - Omega PLATINUM Series User Manual

PLATINUM S eries M eters U ser's G uide
3.3 Connecting I nputs
The 1 0-­‐pin i nput c onnector a ssignments a re s ummarized i n T able 1 . T able 2 s ummarizes t he u niversal
input p in a ssignments f or d ifferent s ensor i nputs. A ll s ensor s elections a re f irmware-­‐controlled
Input C onfiguration ( INIt > I
sensor t o a nother. F igure 5 p rovides m ore d etail f or c onnecting R TD s ensors. F igure 6 s hows t he
connection s cheme f or p rocess c urrent i nput w ith e ither i nternal o r e xternal e xcitation.
Pin N o. Code
1 ARTN Analog r eturn s ignal ( analog g round) f or s ensors
2 AIN+ Analog p ositive i nput
3 AIN-­‐ Analog n egative i nput
4 APWR Analog p ower c urrently o nly u sed f or 4 -­‐wire R TDs
5 AUX Only u sed w ith c ontroller m odels
6 EXCT Excitation v oltage o utput r eferenced t o I SO G ND
7 DIN Digital i nput s ignal ( latch r eset), P ositive a t > 2 .5V, r ef. t o I SO G ND
8 ISO G ND Isolated g round f or s erial c ommunications, e xcitation, a nd d igital i nput
9 RX/A Serial c ommunications r eceive
10 TX/B Serial c ommunications t ransmit
Pin Diff Process
Number Voltage Voltage
1
Vin + /-­‐
2 Vin + /-­‐
Vd + /-­‐
3
4
5
*For R emote S etpoint w ith a n R TD, P in 1 o n t he O utput C onnector m ust b e u sed f or t he R tN i nstead o f P in 1 o n t he
Input C onnector. R emote S etpoint i s n ot a vailable i f u sing a n R TD s ensor a nd h ave a n S PDT ( Type 3 ) O utput
installed.
** R equires e xternal c onnection t o p in 4
NPt)) a nd n o j umper s ettings a re r equired w hen s witching f rom o ne t ype o f
Table 1 – 1 0-­‐Pin I nput C onnector W iring S ummary
Table 2 – I nterfacing S ensors t o t he I nput C onnector
Process Thermo-­‐
Current couple
Rtn
I+ T/C+
I-­‐ T/C-­‐
Description
2-­‐Wire 3-­‐Wire 4-­‐Wire
RTD RTD RTD
** RTD2-­‐ RTD2+
RTD1+ RTD1+ RTD1+
RTD2-­‐
RTD1-­‐ RTD1-­‐ RTD1-­‐
Wiring I nstructions
( see 6 .1
Remote
Thermistor
Setpoint
Rtn(*)
TH+
TH-­‐
V/I I n
10