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OPT-830A, OPT-830B

The OPT-830A/830B daughter board series provide differential inputs for the DAQ cards.

Daughter board OPT-830A provides eight differential amplifiers for signals with common mode voltage up to ±250VDC (measured difference signal up to ±10VDC). The overvoltage protection is even ±500VDC. This so high values allow to eliminate the need for use isolating amplifiers in many applications.

The OPT-830B version allows the user to expand the number of measured channels from eight up to 32 (by a parallel connection of up to 4 boards). However, this feature requires two control signals generated by the DAQ card and not all meet this requirement.

The CAB-2511/2 cable (not included) is used for connection the OPT-830A with the DAQ card. If the DAQ card provides the 12V and 5V power supply voltages, the OPT-830A board is powered from the card via CAB-2511/2 cable; if not, external power supply must be used.
The OPT-830B boards also require an interconnection cable CAB-2514X (not included).

OPT-830A/830B board is supplied as an unencapsulated kit, a plastic housing DIN-830 suitable for mounting on the 35 mm DIN rail is supplied optionally.

OPT-830A and OPT-830B diferences

OPT-830A: eight differential amplifiers
OPT-830B: eight differential amplifiers, but extra tri-state output drivers

All other features are identical.

Delivery details

The product packet includes the board only (cables and DIN35 housing are not included), documentation is available in the Download section.


Type OPT-830A OPT-830B
Analog inputs 8 DIFF.
Input voltage
±11V max. (for proper operation)
Input voltage
(common mode)
±250VDC max. (for proper operation)
±300VDC max. (overvoltage protection; continuously)
±500VDC max. (short-time protection; max. 10s)
Input impedance 800kΩ (differential)
200kΩ(common mode)
gain 1x (±0.05%)
Common mode
rejection ratio
(can be compensated by a potentiometer)
Bandwidth 0÷25kHz (full range signal ±10V)
0÷200 kHz (small signal ±0.1V)
Linearity ±0.02% typ.
Output voltage ±11V max. (for proper operation)
Output load >10kΩ (OPT-830A) >100kΩ (OPT-830B)
Input connectors tool-free terminals
Power supply 12VDC (±10%), 60mA max. 12VDC (±10%), 60mA max.
5VDC (±5%), 20mA max.
Dimensions approx. 72x110 mm
Weight approx. 70 g
Weight and dimensions
of product packaging
approx. 120 g
cardboard box approx. 180x130x40 mm