2.7
Date Code 20080918 Instruction Manual SEL-749M Relay
Installation
Rear-Panel Connections
Rear-Panel Connections
Figure 2.2 shows the rear-panel connections for selected card options.
Figure 2.2 Rear-Panel Connections of Card Options
NOTE: After any change, be sure to
thoroughly test the settings.
Card 1: Current Card (4 ACI)
Card 2: Voltage Card (AVI)
Card 3: Three Digital Inputs/Four Digital Outputs/ One
Analog Output Card (3 DI/4 DO/1 AO)
Card 4: Eight Digital Inputs Card (8 DI)
Card 5: Communications Card (EIA-232/EIA-485)
Card 6: Main Board with IRIG-B and EIA-232 Rear Port
Card 7: Main Board with PTC and EIA-232 Rear Port
01
02
IA
03
04
IB
05
06
IC
07
08
IN
02
03
VA
WYE
VB
VC
VB
(COM)
VC
VA
OPEN
DELTA
N
COM
01
04
INPUTS:
AO_0 1
IN_0 1
IN_02
IN_03
OUT_0 1
OUT_02
OUT_03
OUT_04
08
05
06
02
04
09
03
10
11
12
13
14
07
01
+
—
INPUTS:
08
05
06
02
04
09
03
10
11
12
13
14
15
16
07
01
IN_0 1
IN_02
IN_03
IN_04
IN_05
IN_06
IN_07
IN_08
PORT 4C
+5 Vdc
RXD
N/C
TXD
GND
5
N/C
RTS
GND
E IA–232
1
2
4
3
6
8
CTS
7
9
+TX
–TX
+RX
–RX
SHLD
5
PORT 4A
EIA–485
1
2
4
3
+5 Vdc
RXD
+IRIG–B
TXD
GND
5
–IRIG–B
RTS
GND
PORT 3
E IA–232
IRIG–B
PORT 2
FI BER OPTI C
RTD MODULE
RX
1
2
4
3
6
8
CTS
7
9
02
01
+
—
+5 Vdc
RXD
N/C
TXD
GND
5
N/C
RTS
GND
PORT 3
E IA–232
PTC
PORT 2
FI BER OPTI C
RTD MODULE
RX
1
2
4
3
6
8
CTS
7
9
02
01
+
—
Courtesy of NationalSwitchgear.com
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