Constant Current Stimulus Isolator

Order code

Automated bipolar pulsing for zero net charge on biological preparations

  • Constant current
  • Unipolar and bipolar stimulation modes
  • Built-in non-compliance alarm
  • Input is optically isolated
  • Standard TTL triggering
  • DC test mode
  • Powered by 9 V alkaline or rechargeable batteries


Part # Description Battery Type Includes Charger
A365RC A365R with an A362 Battery Charger Rechargeable Battery Yes
SYS-A365R High Voltage Isolator, Bipolar Rechargeable Battery No
SYS-A365D High Voltage Isolator, Bipolar Alkaline Batteries _


  • Compliance voltage is 100V or better
  • Bipolar mode auto generates alternating positive and negative pulses from TTL input
  • Test mode simplifies performance verification
  • Optical isolation enhances safety of the preparation and reduces noise susceptibility


  • Electrophysiology
  • Brain slice stimulation
  • In vivo brain and CNS stimulation

Activated by conventional logic-level commands, Model A365 can be gated by any pulse generator, stimulator or computer output with automated bipolar pulsing for zero net charge on biological preparations.

Dual tone audible alarms

A tone sounds when an open electrode circuit is detected or when system compliance is reached. A second optional tone sounds when a signal is applied to the input. A test switch is also provided to check battery charge.

Current delivery up to 10 mA at more than 100V

Stimulus currents are set using a three-digit control knob and a three-position range switch. Output current tracks control set­tings to better than 1%. Output current is load independent, and voltage suf­fi­cient to push the desired current through the load is automatically de­vel­oped, sub­ject only to compliance limits. Model A360LA produces up to 10 mA current, in three ranges, at more than 100 V compliance.

Bipolar Output Polarity

Output polarity is determined by a push switch on the front panel. Bipolar current is toggled by the command waveform, setting al­ter­nat­ing pulses as positive or negative.


This A365RC Stimulus Isolator includes both the A365R Stimulus Isolator and the A362 battery charger.The rechargeable A365R is supplied with a nickel metal hydride battery stack. The A362 Battery Charger is required with the A365R

 NOTE: Not intended for human use.

OUTPUT WAVEFORM DC or current pulse
OUTPUT CURRENT RANGES 0.1, 1.0, and 10 mA
CURRENT AMPLITUDE ERROR 0.5% of full scale, max.
CURRENT RESOLUTION 0.1% of full scale, typical
EXTERNAL COMMAND THRESHOLD 5 V at 3 mA, min. 10 V, max.
OUTPUT POLARITY Reversible, manual switch or automatic
CURRENT RISE TIME & DELAY 6 μs, typical (1 KΩ load)
CURRENT FALL TIME & DELAY 10 μs, typical (1 KΩ load)
OPTOCOUPLER 2500 V, rated min. breakdown voltage
POWER: Model A365D (dry cell) 16 alkaline 9 V batteries, included
POWER: Model A365R (rechargeable) 16 rechargeable NiMH 9 V batteries included
DIMENSIONS 8.5 x 3.5 x 5 in. (22 x 9 x 12 cm)
SHIPPING WEIGHT 4 lb. (1.8 kg)

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