Pneumercator ETD1000 Instruction Manual - page 14
ETD1000 Instruction Manual - 2017-07-01.docx
Page 14 of 28
July 1, 2017
2.2.2 Communications
The ETD1000 supports an RS-485 multi-drop cabling topology as illustrated in Figure 2.2.2-1 below.
Maximum cable distance from the TMS console to the furthest ETD1000 is 4000 feet (1200M).
Figure 2.2.2-1 Communications Topology
2.2.2.1 Cable Requirements
Cable type should be 24AWG, single twisted pair, shielded, designated for RS-485 communications
having a nominal impedance of 120 ohms.
Recommended Cables:
-4
to 176F (-20 to 80C) Operation* - Belden 9841 or equivalent
-94
to 392F (-70 to 200C) Operation* - Belden 89841 or equivalent
*See Section 5.0 Product Specifications for Operating Temperature range limits of the ETD1000.
DWG NO. 20027 REV. B
PNEUMERCATOR
Li qu id Lev el Cont ro l Syst em s
ETD 1000
ELECTRONIC TANKDISPLAY
AC
POWER
ELECTRONIC TANKDISPLAY
ETD 1000
PNEUMERCATOR
Li qu id Lev el Cont ro l Syst em s
JUNCTION BOX
END-OF-RUN
ETD1000 OR RA400
#2
#1
TMS
4000 FEET (1200 M) MAX. DISTANCE
PNEUMERCATOR
Li qu id Lev el Cont ro l System s
TANKMANAGEMENT SYSTEM
TMS
ETD1000 OR RA400
ETD1000 OR RA400
PNEUMERCATOR
Li qu id Le ve l Cont ro l Syst em s
REMOTEANNUNCI
ATOR
RA 400
PNE
Liqu id Leve
REMOTEANNUNCI
ATOR
RA 400
AC
POWER
AC
POWER
ELECTRONICTANK DISPLAY
ETD 1000
PNE
Li qu id Lev e
REMOTEANNUNCI
ATOR
RA 400
IMPORTANT! Use only recommended RS-485 communications cable or
manufacturer’s DOCUMENTED equivalent.