Alpha Technologies Serial System Controller - Manual (Page 16)

16
018-332-C0-002 Rev. B
1. System Overview
© 2001 TM
Figure 1-5; ECM Port on SSC
Figure 1-6; ECM COMM Port
2
1
4
3
Top of ECM
2
1 3
4
1.2.5 Serial Communications Interfaces, continued
1.2.5.4 ECM Port
This interface connects the SSC to the Engine Control Module
(ECM) in an AlphaGen generator system. The SSC coordinates
all generator activity and status monitoring through this
interface.
The ECM port is a 4-pin terminal block:
Pin # Description
1 ECM » 8V
2 + RS-485
3 - RS-485
4 ECM Ground
Note: When Alpha standard cable is not used for the ECM
connection, it is necessary to install the opposite end
of the non-Alpha cable into the ECM, at the port labeled
COMM. To do this, install wire #1 into pin-out #1 on the
terminal block, using a small slotted screwdriver. (Verify
that the same wire numbers are used in both ends of the
connection.) Install wires 2 through 4 in the same
manner.
Note: The ECM connection is separate and isolated from the
power supply internal bus, and has its own connector.
1.2 Indicators & Connections, continued