Electrical Connections - Honeywell temaline TK C21P Installation Manual

Electrical Connections

You must connect the following cables to the RTU-A01P unit:
– 12V power cable.
– L W
ON ORKS
– I/O cables from the contacts/sensors.
Make sure that the 12V cable corresponds in size to the norms
indicated in the table below; the size of the 12V cable can be
calculated using the following table (maximum voltage drop on the
cable = 0.5V):
Cable length (m) = 0.5V / (I[A] load x 2 x (res [Ohm/km] /1000))
Type of cable
AWG mm2
10 5,25
12 3,3
14 2
16 1,3
18 0,9
20 0,6
22 0,35
• The L W
ON ORKS
• In a free-topology configuration, the sum total of the sections must
not exceed 500m.
• In a bus configuration, the sum total of the sections must not
exceed 2700m.
• In a free-topology configuration, activate the 50ohm terminator by
placing the appropriate jumper on the FTT10A plug-in of the
TemaServer.
• In a bus configuration, place two terminators (with resistance
values of 100ohm 1% ½W) at the two ends of the bus.
• Check that the length of the L
to the norms indicated in Table 1.
1 L W ® is a trademark of the Echelon Corporation
ON ORKS
Page 2
 1 twisted-pair cable.
Ohm/Km 100 [mA] 200 [mA] 500 [mA]
3,41 733
5,7 439
8,8 284
14 179
21 119
34 74
52 48
 1 data cable must be twisted-pair.
Length (m) in relation to base load
1 [A]
367 147
219 88
142 57
89 36
60 24
37 15
24 10
W  1 data cable corresponds
ON ORKS
PRELIMINARY OPERATIONS
2 [A] 5 [A]
73 37
44 22
28 14
18 9
12 6
7 4
5 2
15
9
6
4
2
1
1