ETD1000 Instruction Manual - 2017-07-01.docx Page 16 of 28 July 1, 2017
Figure 2.2.2.4-1 TMS Communications Connection, Current Version Boards
Figure 2.2.2.4-2 TMS Communications Connection, Previous Version Boards
2.2.2.5 Line Termination Resistor
The RS-485 bus requires that the end-of-run device be terminated with a 120-ohm resistor. This is
accomplished by setting the LINE TERMINATION switch to “ON” if the selected ETD1000 is the last
device on the bus. Otherwise this switch should be set to “OFF”.
DRAWING NO. 20030 REV. B
RS-485 COMMS.
3 POSITION
TERMINAL BLOCK
3/4" NPT
FITTING AND
CONDUIT
1/2" NPT
FITTING AND
CONDUIT
RS-485 COMMS.
3 POSITION
TERMINAL BLOCK
–OR–
TMS3000/TMS4000TMS2000
ISGND
GND
NEUT
ISGND
HOT
ISGND
GND
NEUT
ISGND
HOT
RS-485
COMMUNICATIONS I/O
CH. B (BL/WHT)
SH D(SHIE LD)
CH. A (WHT/BL)
C
H. B
(BL/W
HT)
C
H.
A
(
W
H
T/
B
L)
SH
D
(SHI
EL
D
)
RS-485
COMMUNICATIONS I/O
DRAWING NO. 20029 REV. A
OR
RS-485 COMMS. 6 POS. TELCO
MODULAR CONNECTOR
TMS 3000
TMS 2000
ISGND
GND
NEU T
ISGND
HOT
ISGND
GND
NE UT
ISGND
HOT
CONTACT PNEUMERCATOR TECHNICAL
SUPPORT AT (800) 209-7858 FOR A
BOARD UPGRADE.
NOTE
DRAWING NO. 20034 REV.
S2
"ON" FOR
END-OF-R UN ONLY
LINE TERMINATO R
OFF
ON
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