8 HD65 & HD130 STEPPER DRIVES USER GUIDE

SK1SK2
SYNC
TP1 TP2 TP3 TP4
D2
D1
18916
R1
R2
SYNC
R29
R3
R4
R5
R6
24V
FAULT
ZERO
PHASE
BOOST
DIRN
CK
ENG
0V
18V
0V
18V
0V
ANTI
RES
SQ OFF
EXT RESET
SYNC
Figure 3. Terminals on HD-Series Motherboard

Control

Signals When the rack system is equipped with Digiplan control modules,
the signal connections are made via 8-way jumper cables fitted to a
mating connector on each drive motherboard. In these systems it is
not normally necessary to make external signal connections to the
drives, since all control signals go to the control card motherboard.
Where the rack is equipped with drives only, control connections are
made to the two-part connectors on the drive motherboard (see
Figure 3). The following list describes the function of each terminal.
PIN 1 - +24v. This is an auxiliary fused output which provides 24
volts unregulated at up to 500mA. If the load is to exceed 250mA, fit
an external 2200uF 35v capacitor between this terminal and terminal
8 (0v). Remember to observe the correct polarity.
PIN 2 - Fault. This is a composite output signal which goes high in
the event of an overload, short circuit, supply failure or
overtemperature fault. It is driven by an open-collector transistor
and should therefore be pulled up by an external resistor when the
signal is required. The resistor should be returned to a voltage no
higher then 30 volts and should not allow more than 15mA to flow
when the output is low.