3.5.2 Sequence Output Circuit
Three types of SERVOPACK output circuit are available.
(1) Photocoupler Output Circuit
Photocoupler output circuits are used for servo alarm (ALM), servo ready (/S-RDY), and other sequence out-
put signal circuits. Connect a photocoupler output circuit through a relay or line receiver circuit.
SERVOPACK
Note: The maximum allowable voltage and the allowable range of current capacity for photocoupler output circuits are as
follows.
• Voltage: 30 VDC
• Current: 5 to 50 mA DC
(2) 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.
These terminals output the following signals via the line-driver output circuits.
• Output signals for which encoder serial data is converted as two phases pulses (PAO, /PAO, PBO, /PBO)
• Origin pulse signals (PCO, /PCO)
Connect the line-driver output circuit through a line receiver circuit at the host controller.
Incorrect wiring or incorrect voltage application to the output circuit may cause short-cir-
cuit.
If a short-circuit occurs as a result of any of these causes, the holding brake will not
work. This could damage the machine or cause an accident resulting in death or injury.
Relay Circuit Example
5 to 24 VDC
Relay
0 V
Line Receiver Circuit Example
SERVOPACK
3.5 Examples of Connection to Host Controller
Line Receiver Circuit Example
SERVOPACK
Host Controller
Applicable line receiver:
SN75ALS175 or the
equivalent
220 to
470 Ω
5 to 12 VDC
3
3-31