7SG15 MicroTAPP Description of Operation
©2013 Siemens Protection Devices Limited Chapter 1 Page 37 of 38
Appendix C
S1S3 S2
13
28
26
27
25
23
21
15
14
7
5
3
1
15
13
11
9
17
19
21
+-
8
6
4
2
16
14
12
10
18
20
22
24
26
28
6
5
4
10
9
8
7
11
12
17
19
18
20
S16S17 S14S15 S13 S12
23
25
27
S18S19
RL13,12 RL11,10 RL9 RL8 RL7 RL6 RL1RL2RL3RL4RL5
Front serial
comms port 2a
25 way 'D'
connector
(female)
IRIG-B
Rx-2b
Tx-2b
Rx-1
Tx-1
24
23
25
28
27
26
VA
VC
VB
PSU
IO2
AN1
Rear F.O.
comms ports
CPU
FASCIA
Notes
1. Analogue connections show use with a star-connected VT, other arangements can
be used.
2. CT connection is shown on blue phase, any connection can used.
3. IO2 is provided on E12 case sizes only.
IO2 arrangement is for MT-XXX-XJ ordering option.
For MT-XXX-XK ordering option, all Output Contacts on IO2 are Normally-Open.
Ir
Vr
Vs
ISO Rx
20
7
2
3
4
5
6
ISODTR
ISO Tx
ISORTS
ISODTR
ISODTR
ISOGND
S5 S4
8
6
4
2
16
14
12
10
18
20
22
24
26
28
+-
S7 S6S9 S8S10S11
7
5
3
1
15
13
11
9
17
19
21
23
25
27
B0
B1
B2
B3
B4
B5
COM
Analogue
TPI
Digital
TPI
A+
wiper
A-
CAN GND
CANL
IO1
see note 1
see note 2
see note 3
Terminating Resistor is
internal to Relay
CANH
External Link for Line
Termination - only fitted on
Relay at end of Can-bus
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