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PZ5 Tech Notes

PZ5 amp types default to AC coupled


Product: PZ5
Version: >= v1.1.2 firmware
Date Added: 2015-09-02


When configuring logical amplifiers from the PZ5 touchscreen, all amplifier types are now set to AC coupled by default.

Finding the MAC Address


Product: RS4, RV2, PZ5, BH32, RZ-UDP
Version: RS4 and RV2 Firmware < v1.13, PZ5 and BH32 = All
Date Added: 2014-08-15


In some labs, the network administrator may require users to provide a networked TDT device's MAC address.


For the RS4 and RV2:

Upgrade the RS4 or RV2 firmware to v1.13 or later (available on the Config tab). The MAC address can now be found on the RS4 and RV2 touchscreen interface. Show the Status tab and touch the Current IP value. A Network Configuration dialog pops up and the MAC address is displayed in the dialog.

For other devices:

To determine the address, the PC must be directly connected to the TDT device so that they are on the same network. Connect one of the devices for which you need the MAC address and complete the steps below, then repeat with each device, one at a time.

  1. On your PC, run the zBUSmon network search to make sure you can see the device and note it's IP address.

  2. Click Start. In the Search/Run box, type cmd and press the Enter key.

  3. In the Command Line window, type ping, replacing with the IP address of the device.

  4. After the ping response has finished, type arp -a.

  5. Under Internet Address, locate the IP address you just pinged. In the same line, under Physical Address, the corresponding MAC address is listed.


If the TDT device does not automatically identify on a network, you can force it to reset its IP address by unplugging the Ethernet cable and plugging it in again.

PZ5 Scaling Issues with RZ2_Input_MC


Product: RPvdsEx, PZ5
Version: All
Date Added: 2013-09-17


When using the RZ2_Input_MC macro with the PZ5, you must scale the signals.


Use an MCScale component to multiply the signals by 4.

Building a custom headstage to use with PZ, IZ, or ACO


Product: PZ5, PZ2, PZ3, IZ2, IZ2H, IZ2M, IZ2MH, ACO32, ACO64
Version: All
Date Added: 2012-02-08


This tech note provides the information needed to wire a custom or third-party headstage to TDT amplifiers, stimulus isolators, and commutators.


The PZ5, PZ2, PZ3, IZ2, IZ2H, IZ2M, IZ2MH, ACO32, and ACO64 all use the same female mini-DB26 connectors. The mating male connector is made by TE Connectivity (previously Tyco), part number 5749621-2, and can be purchased from Newark, Digikey, or similar vendors. The part number for the connector's backshell kit is 749608-2.

The PZ5, PZ2, PZ3, IZ2, and IZ2H are all battery powered. To conserve power, each bank of channels will not turn on unless a headstage is connected. The device detects whether a headstage is connected through the HSD (HeadStage Detect) pins: pins 18 and 19. These pins should be shorted together on the headstage connector. If pins 18 and 19 are not shorted the headstage will not be detected and the bank that it is connected to will power off.


This does not apply to the IZ2M and IZ2MH. In those devices all banks are always powered.

The pins on the headstage should be made to match the connector on the intended device. The pinouts for each device are shown below.


The user must increment the channel numbers by 16 (or 8) according to the amp, mode and position of the connector. So, for the connector labeled 'A', A1 is channel 1 while on the connector labeled 'B', A1 may be channel 17.

PZ5 Connector Pinout for Building Headstages

PZ5 NeuroDigitizers have up to eight 26-pin headstage connectors on the back of the unit. The connectors are labeled alphabetically from bottom to top. Each connector carries signal for one bank of channels with ground and reference. The corresponding channel numbers depend on:

  1. the reference mode configurations

  2. the position of the bank in a logical amplifier.

For simplicity sake, the diagrams below assume channels for that connector begin with channel 1. For example, A1 - A16 represent the 16 channels coming from the connected headstage.

Local Mode

None Mode

Shared Mode

Differential Mode

PZ2 Connector Pinout for Building Headstages

PZ3 Connector Pinout for Building Headstages

IZ2, IZ2M, IZ2MH Connector Pinout for Building Headstages

IZ2H Connector Pinout for Building Headstages

The ACO passes signals from each header to the pins on the associated DB26 connector on the face of the commutator. The unused pins should not be connected. The pins on the headstage should be made to map to the connected amplifier/stimulator via the header as follows:

ACO Headers - Pinout for Building Active Headstages

For PZ2 or PZ5

For PZ3

ACO Headers - Pinout for Building Passive Headstages

For IZ2, IZ2M, or IZ2MH

For IZ2H