SMD-23 Integrated Stepper Drive & Motor
20 Gear Drive, Plymouth Industrial Park, Terryville, CT 06786
page: 8
Tel: (860) 585-1254 Fax: (860) 584-1973 Web: www.amci.com
ADV ANC ED
MIC RO CON T RO L S INC.
SMD23 Electrical Installation
Power supply inputs are NOT reverse connection protected. Applying
reverse voltage will damage unit.
Logic inputs are rated for 5Vdc max. Exceeding 5vdc will damage the
unit unless the recommended limiting resistors are used.
Control Signal Wiring
Programmer Wiring – CSMD-5 cable
SMD Connector – AMCI part # MS-8P Serial Port Connector – DB-9
To SMD
To PC Serial Port
1. DC Supply
24-75Vdc
1. N/C
2. DC Common
Vdc com
2. RXD
3. DTR
3. TXD
4. RXD
4. DTR
5. RTS
5. GND
6. N/C
6. N/C
7. TXD
7. RTS
8. GND
8. N/C
9. N/C
Use a general purpose diode with a breakdown voltage greater than 30Vdc such as 1N4005
or 1N4148 to protect the SMD RTS input.
The eight pin connector of the SMD is used for programming and control. The SMD drive monitors
the TXD signal coming from the computer’s serial port for a specific sequence of data. When the
SMD receives this data, it enters programming mode. To exit programming mode you must cycle
power on the SMD and reconnect the motion control signals. The SMD automatically enters motion
mode when power is re-applied.
Pin 1 +Vdc
Pin 2 Vdc Common
Pin 3 – Disable
Pin 4 + Disable
Pin 5 – Step
Pin 6 + Step
Pin 7 – Direction
Pin 8 + Direction
1 2 3 4 5 6 7 8
+
V
IN
–
V
IN
–
D
IS
+
D
IS
–
S
TP
+
S
TP
–
D
IR
+
D
IR
0.43" Nominal
(10.9 Nominal)
