Electrical Connections - Toshiba G1IF1 Instruction Manual

3.2 Electrical Connections

A 12-way ring terminal, connector TB1 of G1IF1 provides connections for the auxiliary dc
supply as well as test points for the telecommunications channel. The G1IF1-01 provides the
additional X.21 connector is a 15-way DIN type.
The G1IF1 auxiliary dc supply input has a nominal 48V rating as standard for communications
equipment. However the G1IF1 can also be provided with dc 110/125V rating or dc 220/250V
rating for 110/125V or 220/250V substation battery supplies.
The connections to the G1IF1-01 are shown in Figure 3.2 (a), not including the test points. The
figure also illustrates the functions of three removable links. The X.21 interface circuit is
designed for 500V isolation against the rest of the system. However, it may not be desirable to
leave the common connection floating, particularly where high levels of interference are
expected. Therefore the X.21 common can be tied via a 10k resistance to the frame ground, by
fitting link J1. Alternatively, the fitting of links JIG and JFG connects the X.21 common directly
to the frame ground.
It is recommended that a shielded cable be used for the X.21 interface. The shield should be tied
directly to the frame ground by the fitting of link JFG.
GRL100 Relay
Fibre-optic cable
Code
RX
Conversion
O/E
Code
TX
Conversion
E/O
CLK
E/O
Power on
Data from COM
Data from Relay
CLK from COM
Figure 3.2 (a) Connection Diagram for G1IF1-01 and G1IF1-04
I
S
O
L
A
T
I
O
N
J1
JIG
R
FG
JFG
+5V
ＤＣ／ＤＣ
0V
LG
 6 
6 F 2 S 0 7 5 5
2
A
TX
9
B
４
A
RX
11
B
Communication
equipment
(X.21 interface
:D-sub 15pin)
6
A
CLK
13
B
8
CG
SG
1
FG
TB1-1
FG
+
TB1-2
P
-
TB1-3
N