Eaton MP-3000 Instruction Leaflet page 47

6.1.6 URTD Wiring
Connect a source of 120 Vac only to the power terminals of connector
J3 on the URTD module. Connect either terminal 16 or terminal 32
(but not both) to a non-current-carrying safety ground.
Table 6.1 Eaton Cutler-hammer agilent Technologies
Cabling.
Length (Meters) Catalog Number
1 MPFO-1
5 MPFO-5
10 MPFO-10
25 MPFO-25
50 MPFO-50
75 MPFO-75
76 MPFO-76
100 MPFO-100
120 MPFO-120
Uncut Fiber Not Applicable
Figure 6.7 shows connections between the URTD and the MP-3000.
Use either the optical fiber or the electrical 3-wire connection. It is not
necessary to connect both. If both are connected, the MP-3000 uses
data from the optical fiber. It defaults to the wired connection, only if
the fiber is removed or fails.
NOTE: The optical fiber is the much-preferred method of transmitting
temperature data from the URTD to the MP-3000. It is also
easier to install.
Preassembled plastic optical fibers with connectors can be ordered
from Eaton Inc., or from any distributor of Agilent Technologies® opti-
cal fiber products.
In addition, these same distributors offer long rolls of cable with con-
nectors that can be installed in the field. Some distributors will make
custom lengths to order.
The fiber length should not exceed 400 ft (121.9 m). For long runs
over 33 ft (10 m), be sure to use H-P extra low loss plastic fiber HBFR-
ELS or -EUS. Do not splice fiber. Maximum short-term pulling force is
11.3 lbf (50 N).
Surplus length of a precut fiber causes no problems. Simply coil and
tie the excess fiber at a convenient point. Avoid high tie pressure.
The bending radius of the fiber should be greater than 2 in. (50.8 mm).
The fiber terminations simply snap into or out of the connectors of the
URTD and MP-3000.
When using 3-wire shielded cable, wire according to the connection
guidelines in Table III of the Universal RTD Module IL 17367. The
3-wire shielded cable should be #16 AWG (1.31 mm
(0.832 mm ). Connect the cable shield only at the MP-3000 end, at
2
terminal 23. Insulate the shield, and do not connect at the URTD end.
MP-3000
If ThE MP-3000 IS SUPPLIED fROM 240 VaC, ThE URTD COM-
MUNICaTIONS COMMON TERMINaL 22 IS aT 120 VaC WITh
RESPECT TO ThE SUPPLy NEUTRaL.
The maximum cable length is 500 ft (152 m).
Number
HBFR-ELS001 or
6.1.7 Wiring RTDs to the URTD Module
HBFR-RLS001
Consult URTD Module Instruction Leaflet I.L.17367.
HBFR-ELS005 or
HBFR-RLS005
Three URTD terminals are provided for each RTD input. Terminals
1-15 and 17-19 are inputs for up to 6-winding RTDs. Terminals 20-25
HBFR-ELS010 or
accept up to two motor bearing RTDs. Terminals 26-31 accept up to
HBFR-RLS010
two load bearing RTDs. Terminals 33-35 accept an auxiliary RTD.
HBFR-ELS025
The three terminals for any unused RTD input channel should be
HBFR-ELS050
wired together. For example, if MW5 and MW6 are unused, MW5
terminals 13-15 should be wired together; and MW6 terminals 17-19
HBFR-ELS075
should be separately wired together.
HBFR-ELS076
Figure 6.9 shows the wiring of RTDs to the URTD inputs. Use
HBFR-ELS100
#18 AWG, three-conductor shielded cable. Note the connection rules
HBFR-ELS120
in the figure. When making connections to a two-lead RTD, connect
two of the cable conductors to one of the RTD leads as shown. Make
HBFR-EUS (length)
this connection as close to the motor as possible. Connect the third
cable conductor to the remaining RTD lead.
Connect the shield and drain wire, along with the one cable conduc-
tor, to the middle of the three RTD input channel terminals, as shown
in Figure 6.9. The RTD cable shield should be connected only at the
URTD end, and insulated at the RTD end. The RTDs themselves
must not be grounded at the motor.
Remember to set the URTD module DIP switches according to the
types of RTDs in each of the winding, motor bearing, load bearing, and
auxiliary groups. Refer to URTD Module Instruction Leaflet I.L. 17367.
) or #18 AWG
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