YASKAWA SGMJV User Manual page 82

(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.
SERVOPACK
Specifications
Type Signal Name
Output EDM1
Electrical characteristics of EDM1 signal are as follows.
Items
Maximum Allowable Voltage
Maximum Current
Maximum Voltage Drop at ON
Maximum Delay Time
Line Receiver Circuit Example
SERVOPACK Host Controller
Applicable line receiver
SN75ALS175 or the
equivalent
220 to
Ω
470
CN8
EDM1+
8
EDM1-
7
Pin No. Input Status
Both baseblocks by /HWBB1 signal and /HWBB2 signal
ON
CN8-8
normally activate.
CN8-7
−
OFF
Characteristic
−
30 VDC
−
50 m ADC
1.0 V Voltage between EDM1+ to EDM1- at current is 50 mA.
Time from change of /HWBB1, /HWBB2 to change of
20 ms
EDM1
3.4 Examples of Connection to Host Controller
External Device
24 V Power Supply
0 V
Meaning
Remarks
3
3-35