MPI 40 Series - Electrical Interface; Control Signals Driver;Receiver Combination; Interface Connections

3.5 ELECTRICAL INTERFACE
Interface connections are made thru two cables, the power cable and
signal or I/O cable. The following paragraphs will describe each line on the
interface cable. Refer to figures 3-2 and 3-3 for connector pin assignments,
and figure 3-4 for connector dimensions.
The signal interface can be divided into two groups:
A. Control signals
B. Data transfer
All lines on the signal interface are digital (TTL open collector) in nature
and provide either input signals to the drive or output status and data to the
controller. Each line is paired with a ground line. All output lines are open
collector outputs and must be properly terminated at the controller end. The
signal interface cable should be a 50 wire flat ribbon cable no more than 10
feet in length.
Figure 3-1 is the recommended driver/receiver circuit for all interface
signals (connector Jl). A signal on an input line will be received by
a 74L814 receiver at the drive and should be driven by a 7438 driver or
equivalent by the user system. Likewise, an output signal from the drive will
be driven by a 7438 and should be received by a 74L814 or equivalent at the
user system. All input signals are terminated directly by either a 150 ohm to
+5v or a 220/330 ohm resistor network.
+Sv
220.n
DI I I
--,.~ ~!OFT.MAX~
l
1
330f2
74LS14
Figure 3-1: Control Signals Driver/Receiver Combination
3-6