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DAM-16DO

DAM-16DO

RS-485 interface, 16 digital outputs

Overview​

  • Industrial 16-channel digital output module.
  • RS-485 interface and standard Modbus RTU protocol.
  • Outputs use Darlington open-collector drive with opto-isolation; 500 mA per channel.
  • Supports command, cycle, flash on/off, and other output control modes.
  • Dual isolation on the communication path with fuse, TVS, and gas discharge tube protection.
  • Stable and reliable for demanding industrial applications.

Specifications​

ItemDetails
Power6–36 V DC
InterfaceRS-485
Baud rates4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
Default format115200, N, 8, 1
Digital outputs16 channels, 5–36 V, NPN Darlington open-collector, 500 mA per channel
ProtocolStandard Modbus RTU
LEDSTA: solid on in Bootloader mode; slow blink when running; fast blink during communication
Dimensions121 × 72 × 34 mm

Hardware interface​

DAM-16DO
FunctionPinDescription
Power DC 6–36 VVCCPositive
GNDNegative
UnusedNCUnused pin; leave floating
CommunicationRS485 A+RS-485 A
RS485 B-RS-485 B
EARTHRS-485 ground / earth
Digital outputDO COMClamp diode anode; use with inductive loads such as relays
DGNDDigital ground
DO1–DO16Channels 1–16 digital outputs

RS-485 bus wiring​

Most PCs have no RS-485 port. Use a USB-to-RS485 adapter; connect A to the module A terminal and B to B. For multiple devices, use twisted-pair shielded cable in a daisy-chain topology.

Digital output wiring​

Outputs are NPN Darlington open-collector: connect the load between the external supply positive and the corresponding DOx; connect DGND to the external supply negative. For inductive loads (e.g. relays), connect DO COM to the external supply positive to use the module’s built-in clamp/freewheeling protection.
When the output is OFF, DOx is high-impedance, the load is disconnected, and the LED is off. When ON, DOx is pulled low, the load is energized, and the LED is on.

Operation demo​

Two tools are shown below. Either works for first bring-up; the web serial assistant is recommended for a quick start.

  • Web serial assistant: no install; full frame display and parsing; less intuitive for register data.
  • Modbus Poll: direct register access; easier to read output states; frames are not fully shown.
  • Open the serial debug tool, select the COM port, set 115200 N 8 1, and open the port.
  • Enable hex display and hex send, set checksum to ModbusCRC16, send 01 05 00 00 FF 00. CH1 output should turn on and echo the frame.
  • Use Module commands on the right to pick the module model and send preset commands, or expand entries to edit before sending.
  • Common commands builds Modbus function-code frames from parameters.

Resources​

Documentation​

Tools​