EXCEL 100C INSTALLATION INSTRUCTIONS
EN1R-0144GE51 R1105A 44
Transformers
1450 Series
All transformers of the 1450 series are designed for 50/60 Hz AC and have
insulated accessory outputs. The transformers include built-in fuses, line
transient/surge protection, and AC convenience outlets and meet NEC class 2
requirements.
Table 11. Transformer specifications
part #
1450 7287
primary side secondary side
-001 120 Vac 24 Vac, 50 VA
-002 120 Vac
2 x 24 Vac, 40 VA, and 100 VA from separate
transformer
-003 120 Vac 24 Vac, 100 VA, and 24 Vdc 600 mA
-004 240/220 Vac 24 Vac, 50 VA
-005 240/220 Vac
2 x 24 Vac, 40 VA, and 100 VA from separate
transformer
-006 240/220 Vac 24 Vac, 100 VA, and 24 Vdc 600 mA
NOTE:
For installations requiring UL1995 conformance, transformer primary
voltage must not exceed 150 Vac.
Cables
The cable specification depends mainly on the baud rate. There are regional
differences as to whether shielded or unshielded cable must/can be used. The table
below summarizes cable types and gives selection guidance. Note that baud rate
and maximum bus length are related to each other.
NOTE:
In the U.S., shielded or unshielded cable may be used.
Table 12. Cable specifications
max. baudrate max. bus length cable type description recommended for
76800 4,000 ft AK 3702 unshielded / twisted pair U.S.
76800 4,000 ft AK 3740A shielded U.S. (low-cost)
76800 4,000 ft Belden 9842 twisted pair U.S.
76800 4,000 ft Belden 9841 shielded U.S.
The general specification for shielded system bus cable above 76.8 Kbaud 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
2
(24 AWG)
XC5010C/XC6010/Excel 100C, only
If shielded cable is used then both ends of the shield must be connected to
terminals 15 and 18, or 33 and 36, per following figure
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