The Modbus digital I/O Series D1700M modules provide computer monitoring of digital input and
digital output signals for control of industrial devices through solid
The D1700M digital I/O modules
allow a single host computer to control thousands of I/O points from one serial
port using RS-485 and repeaters in Modbus RTU format. When using RS-232 in
Modbus format you are limited to one board or module.
The digital inputs accept a wide signal level input, up to +30Vdc without damage, and
have TTL logic input switching levels.
The digital outputs are open-collector transistors will sink: 30mA
(D1701/D1702), 100mA (D1711/D1712) making them ideal for controlling
solid state relays. The status of digital inputs and digital outputs
are communicated to any host serial port in ASCII using either RS-232
The D1711M and D1712M contain an onboard events counter that counts up to 10
million transitions that occur on the digital input. The event counter may
be read and cleared by the host computer at any time.
The D1700 and D1700M digital I/O modules
can also be mounted on a DIN-Rail using the MK-1
The H1700M series digital
I/O products provide direct interface to industry standard solid-state
relay mounting racks. Use the H1750M to control twenty four relays on
one G4PB24 backplane. Use the H1770M to control up to sixty four relays
on four PB16 backplanes.
Multiple H1700M digital I/O boards allow a host computer to control thousands of digital I/O points from one serial port.
The digital inputs accept signals up to +0-5Vdc without damage and
have TTL logic input switching levels. The digital outputs are
open-collector transistors will sink: 15mA making them ideal for
controlling solid state relays. The status of digital inputs and
digital outputs are communicated to any host serial port in ASCII
using either RS-232 or RS-485.
digital I/O boards are similar to the H1700 Series but
communicates using the Modbus RTU protocol.
Many industrial applications require a 'safe' start-up condition to prevent
accidents at critical points in the process. Each 1700M contains an
initial start-up value which is used to configure the digital outputs on
power up. The initial value is use selectable and stored in EEPROM. Since
each digital output is automatically configured on start-up, no software
initialization routines are required.
The 1700M series contains a user- programmable software timer to provide an
orderly shutdown of the output signal in the event of host computer or
The H1700M digital I/O boards provide direct interface to industry
standard mounting racks and solid-state relays. Industry standard 24 relay mounting racks
can be controlled directly with the H1750M or H1770M digital I/O boards.
|D1701M, D1702M Modules
|D1711M, D1712M Modules
|H1750M, H1770M Boards