2.22
SEL-700G Relay
Instruction Manual
Date Code 20170814
Installation
Rear-Panel Connections
Figure 2.12
Control I/O Connections—Internal RTD Option
Table 2.19 shows the maximum cable lengths for the RTD connections.
Analog Output Wiring
Connect the two terminals of the analog output as shown in Figure 2.13. Also
connect the analog output cable shield to ground at the relay chassis ground,
programmable logic controller (PLC), or meter location. Do not connect the
shield to ground at both locations.
+IRIG-B
–IRIG-B
IRIG-B
PS
A01
A02
–/N
+/H
External
Contacts
SEL-700G Relay
B01
B02
IN101
IN10
2
A10
A11
A12
A07
A08
OUT10
3
A03
A04
OUT101
A05
A06
OUT10
2
A09
As Many as Ten RTD Inputs
D03
COMP/
SHLD
D02
—
D01
+
RTD01
D30
COMP/
SHLD
D29
—
D28
+
RTD10
NOTE:
All RTD Comp/
Shield terminals are
connected internally to
the relay chassis.
Notes:
➤
The chassis ground connector located on the
rear-panel card Slot
A
must always be
connected to the local ground mat.
➤
Power supply rating (125–250 Vac/dc or
24–48 Vdc) depends on the relay part number.
➤
Optoisolated inputs
IN101
and
IN102
are
standard and are located on the card in Slot
A
.
➤
All optoisolated inputs are single-rated: 24, 48,
110, 125, 220, or 250 Vac/Vdc. Standard inputs
IN101/102
can have a different rating than the
optional
IN401/402/403/404
(not shown).
➤
Output contacts
OUT101
,
OUT102
, and
OUT103
are standard and are located on
the card in Slot
A
.
➤
The analog (transducer) outputs shown
are located on the optional I/O
expansion card in Slot
D
.
➤
The fiber-optic serial port is located on
the card in Slot
B
. A Simplex 62.5/125
µm fiber-optic cable is necessary to
connect the SEL
OGIC
with an SEL-2600
series RTD Module. This fiber-optic
cable should be 1000 meters or shorter.
Table 2.19
Typical Maximum RTD Lead Length
RTD Lead AWG
Maximum Length (meters)
28
116 m
26
184 m
24
290 m
22
455 m
20
730 m
18
1155 m
NOTE:
RTD inputs are not internally
protected for electrical surges
(IEC 60255-22-1 and IEC 60255-22-5).
External protection is recommended
if surge protection is necessary.
NOTE:
Connection of dc voltage to
the analog output terminals could
result in damage to the relay.
Содержание SEL-700G Series
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