Model 7405 | 8 Channel Digital to Analog Converter
Features
  • Supports thermocouples, RTD's, strain gauges, voltage in, 4-20 mA, thermistors, and resistors
  • Up to 16 differential input channels plus sensor excitation
  • Each channel is software programmable for sensor type, gain, low-pass filtering, scan rate
  • Auto-calibration eliminates trimpots
  • Low power consumption

The 7405 is a Legacy product and is not recommended for new designs. The lead time for the 7405 may be as long as 12 weeks and may require a minimum quantity order. Please call for availability.

Description
The Sensoray Model 7405 generates eight analog outputs from the STD bus. Each of the eight output channels may be independently configured for either voltage or current output mode. In both modes, output amplitude is a linear function of the applied digital value.

Voltage output
When programmed for voltage out, a channel will generate an output between -10 volts and +10 volts. Full scale output ranges of 0-to-5 volts and 0-to-10 volts are available as factory programmed options.

4-20 mA
Configuring a channel for current output allows driving a 4-20 mA current loop. In this mode, a channel varies its output voltage in order to maintain a constant output current.

Reset
In response to a reset, all channels are automatically reset to the appropriate zero-output condition. Voltage-mode channels are initialized to zero volts and current-mode channels are initialized to 4mA out.

Termination
Output channels are accessible at a 40-pin header at the edge of the 7405 circuit board. Convenient screw terminal breakout boards are available to simplify field wiring.

I/O ports
The 7405 occupies two consecutive addresses in the STD bus 8-bit address space. The base address may be jumper programmed to any even address.

Termination boards
Sensoray offers a variety of breakout boards that convert flat cable connections to screw terminals.

Model 7409TB is a low cost 2" by 4.6" terminal board with a 40-pin flat cable connector on its backside to facilitate panel mounting. Field wiring is made on the front side.

Model 7409TC is a 3.8" by 5.4" terminal board with eight removable terminal blocks, one for each output channel. It has a prototype area for constructing custom circuits.

Model 7409TDIN consists of a 7409TC supplied with snap-rails for DIN rail mounting.

 

Software and Manuals

The included SDK18 (32-bit DLL) software has a DLL for Windows 95/98/N.
A ready-to-go data acquisition program, QuickSense, is available as an option.

7405 Instruction Manual Released 7/3/01
7405 DLL (32-bit DLL) Released 2/1/99

Specifications

Input power, excluding output  drive current +12 to 15 VDC, 30 mA |  5 VDC, 40 mA
Operating temperature -25 to +85C
DAC resolution 12 bits
Channel update rate 10 kHz per channel
Output linearity  0.03%
Output modes  Voltage output: + 10V |  Current output: 4-20mA
Special outputs modes configured at factory  0 to 5 volts, 0 to 10 volts

Images and Mechanical Drawings

Model 7405 Application

Prices

Model 7405 8-channel output board   +10 volts, 4-20mA Please call for availability
Model 7405B 8-channel output board 0.5 volts all outputs Please call for availability
Model 7409TB Small termination board (2 per 417 required ) Qty. 1 $65 Qty. 2-9 $59
Model 7409TC Large termination board Qty. 1 $105 Qty. 2-9 $95
Model 7409TDIN 7409TC with DIN hardware Qty. 1 $140 Qty. 2-9 $125
Model 7409C 18” interconnect cable Qty. 1 $19 Qty. 2-9 $18
Model 7409C1 1 meter interconnect cable Qty. 1 $28 Qty. 2-9 $25