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Installation Guide
T942C and T942C/2 Central Unit
1.4.6
Connection of Buses
Buses are connected either via modular bus cabling or twisted-pairs.
NOTE: The data buses are polarized. Use only twisted-pairs for two-wire connections!
Bus connection via Modular Bus Cabling
See
figure 12
1
Connect modular bus cabling to J01 and J02.
2
Connect additional modular bus cabling:
J14: connect only the C-bus to another Central Unit via a quick-connect terminal block
(type Krone)
Pin
1
2
3
4
5
6
7
8
Figure 12. Modular connectors J01, J02, J08 and J14.
Bus connection via twisted-pairs
C-bus
A-bus
D-bus
Figure 13. Twisted-pairs connection.
• A-bus to J04 screw 3 and 4.
• C-bus to J04 screw 1 and 2.
16 April 2015 / Ver. G
on page 12 for information about modular bus connectors.
Pin 1
234567
J01 + J02
J08
Signal
Pin
Signal
A1
1
Not used
A2
2
Not used
3
Not used
B1
B2
4
Not used
5
Not used
D1
D2
6
Not used
7
A1 data bus
Not used
Not used
8
A2 data bus
J04
1
2
3
4
5
6
Pin 8
J14
Pin
Signal
1
C1 data bus
2
C2 data bus
3
DR1 data bus
4
DR2 data bus
5
D1 data bus
6
D2 data bus
7
Aux relay 1
8
Aux relay 2
TD 91684GB
12
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