Transformers; Relays; Cables - Honeywell Excel 100C Installation Instructions Manual

Transformers

CRT-Series
Backup fuse 10 A

Relays

Cables

76 800
76 800
Table 15. Number of controllers connected to one transformer
transformer
CRT 2
CRT 6
CRT 12
Use quick-acting backup fuse 10 A (or automatic H16 or L16) to protect transformer
primary side. On the primary side of the CRT 2, there is a fusible output of type
M 0.315 A (T) 250 V for the purpose of fine fusing.
FEME Relay:
Impedance:
Pull-In voltage:
Current at 10 Vdc:
Current at 11 Vdc:
Current at 12 Vdc:
The cable specification depends mainly on the baud rate. The table below
summarizes cable types and gives selection guidance. Note that baud rate and
maximum bus length are related to each other.
max. baudrate max. bus length
1200 m
1200 m
NOTE: In Europe, only shielded cable is permitted. Cable J-Y-(ST)Y 2 x 2 x 0.8 is
for internal applications (cables inside a panel) only. For external
applications the equivalent type A-Y-(ST) 2 x 2 x 0.8 can be used.
The general specification for shielded system bus cable above 76 800 baud is as
follows:
• shielded twisted pair installation cable
• capacitance between data lines ≤ 42 pF/m (13 pF/ft)
• capacitance between data line and shield ≤ 76 pF/m (23 pF/ft)
• cross sectional area ≥ 0.5 mm
EXCEL 100C INSTALLATION INSTRUCTIONS
Excel 100C without MCE/MCD
no. of contr. max. line resist.
≤ 0.470 Ω
2
≤ 0.075 Ω
7
≤ 0.085 Ω
12
625 Ω
6.7 Vac
16 mA
17.5 mA
19.2 mA
Table 16. Cable specifications
cable type description
J-Y-(ST)Y
shielded,
twisted pair
2 x 2 x 0.8
A-Y-(ST)Y
shielded,
twisted pair
2 x 2 x 0.8
2
(24 AWG)
49
Excel 100C with MCE/MCD
no. of contr. max. line resist.
≤ 1.180 Ω
1
≤ 0.197 Ω
4
≤ 0.104 Ω
8
recommended for
Europe
Inside cabinet, only
Europe
Outside cabinet, only
EN1R-0144GE51 R1007