I.L. 17562
Page 71
PR 0.3 Effective 8/99
LENGTH Cutler-Hammer Catalog
Number
Hewlett-Packard Number
1 meter MPFO-1 HBFR-ELS001 or HBFR-RLS001
5 meters MPFO-5 HBFR-ELS005 or HBFR-RLS005
10 meters MPFO-10 HBFR-ELS010 or HBFR-RLS010
Uncut fiber HBFR-EUS(length)
In addition, these same distributors offer long rolls of cable with connectors which can be
installed in the field. Some distributors will make custom lengths to order.
The fiber length should not exceed 120 meters (400 feet). For long runs over 10 meters, 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 50 Newtons (11 pounds).
Surplus length of a precut fiber causes no problems. Simply coil and tie the excess fiber at a
convenient point. Avoid high tie pressure. Bending radius of the fiber should be greater than 2
inches.
The fiber terminations simply snap into or out of the connectors of the URTD and MP-3000.
When using three-wire shielded cable, wire according to the connection guidelines in Table III of
the Universal RTD Module IL 17367. The three-wire shielded cable should be #16 AWG or
#18 AWG. Connect the cable shield only at the MP-3000 end, at terminal 23. Insulate the shield
and do not connect at the URTD end.
CAUTION
If the MP-3000 is supplied from 240 Vac, the URTD Communications Common terminal 22 is at
120 Vac with respect to the supply neutral.
The maximum cable length is 150 meters (500 feet).
6.2.7 Wiring RTDs to the URTD Module - Consult URTD Module Instruction Leaflet I.L.17367.
Three URTD terminals are provided for each RTD input. Terminals 1-15 and 17-19 are inputs
for up to six winding RTDs. Terminals 20 to 25 accept up to two motor bearing RTDs. Terminals
26-31 accept up to two load bearing RTDs. Terminals 33 to 35 accept an auxiliary RTD.
The three terminals for any unused RTD input channel should be wired together. For example, if
MW5 and MW6 are unused, MW5 terminals 13, 14, and 15 should be wired together; and MW6
terminals 17, 18, and 19 should be separately wired together.
See Figure 6.9 for wiring of RTDs to the URTD inputs. Use #18 AWG, three-conductor shielded
cable. Note the connection rules 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 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 conductor, 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. See I.L. 17367.
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