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975-0082-01-01 11
Xanbus Automatic Generator Start Installation
Wiring to the 20-contact Connector
ELV Circuits ELV (Extra-Low Voltage) circuits have an open-circuit
voltage of not more than 30 V
rms
or 42.2 VDC or peak, and are therefore
not a shock hazard.
Class 2 Circuits As per the US National Electrical Code (NEC) and the
Canadian Electrical Code (CEC), available power in Class 2 circuits is
limited to 100 VA, usually by current limiting by means of overcurrent
protection or series resistance. The current is limited to 5 A for circuits with
open-circuit voltage of 20 V, and to I=100/V
oc
for circuits with open circuit
voltage between 20 V and 30 V.
Circuit Limitations The relay contacts in the AGS are rated at 5 A
maximum and all circuits on the 20-contact connector are rated at 30 V
maximum.
Ensure that all circuits connected to the 20-contact connector comply with
the following limits:
Wiring Harness Connections to the generator, thermostats, and external
ON/OFF switches are made using a wiring harness that plugs into the 20-
contact connector (see Figure 5).
The wires on the wiring harness can be extended to meet installation
requirements. When extending the wire harness, ensure that the extension
wires are the same color as the wires on the harness.
ELECTRICAL SHOCK HAZARD
All installation wiring should be performed by a qualified installer or
electrician.
The 20-contact connector is intended for connection to Class 2 ELV
(Extra Low Voltage) circuits only. Do not exceed the circuit limitations
specified in the following section.
Failure to follow these instructions can result in death or serious
injury.
Circuit Parameter Circuit Maximum
Open circuit voltage (Voc) 30 V maximum
Overcurrent protection
(fuse size for open circuit voltage up to 20 V)
5 A maximum
Overcurrent protection
(fuse size for open circuit voltage from 20 V to
30 V)
5 A to 3.33 A
(100/V
oc
amps
maximum)