(3) Line Driver Output Circuit
CN1 connector terminals, 33-34 (phase-A signal), 35-36 (phase-B signal), and 19-20 (phase-C signal) are
explained below.
Encoder serial data converted to two-phase (phases A and B) pulse output signals (PAO, /PAO, PBO, /PBO)
and origin pulse signals (PCO, /PCO) are output via line-driver output circuits. Normally, the SERVOPACK
uses this output circuit in speed control to comprise the position control system at the host controller. Connect
the line-driver output circuit through a line receiver circuit at the host controller.
(4) Safety Output Circuit
External device monitor (EDM1), an output signal of safety function, is explained below.
Specifications
Electrical characteristics of EDM1 signal are as follows.
Line Receiver Circuit Example
Applicable line receiver
SN75ALS175 or the
equivalent
Host Controller
220 to
470
Ω
SERVOPACK
24 V Power Supply
SERVOPACK
External Device
EDM1+
EDM1-
0 V
8
7
CN8
Type Signal Name Pin No. Input Status Meaning
Output EDM1
CN8-8
CN8-7
ON
Both baseblocks by /HWBB1 signal and /HWBB2 signal
normally activate.
OFF −
Items Characteristic Remarks
Maximum Allowable Voltage 30 VDC −
Maximum Current 50 m ADC −
Maximum Voltage Drop at ON 1.0 V Voltage between EDM1+ to EDM1- at current is 50 mA.
Maximum Delay Time 20 ms
Time from change of /HWBB1, /HWBB2 to change of
EDM1
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