TDT BH32 Manual de usuario

17-17

BH32 Behavioral Cage Controller

BH32BehavioralCageController

Overview

The BH32 Behavioral Cage Controller integrates neural signals with behavioral inputs

and outputs from standard behavioral cages; such as operant conditioning boxes. The

device acts as a network appliance that can be used over a LAN to control several

behavioral boxes or can be directly linked to a TDT RZ device for integration with

neural recordings. The device provides the end user with 32 I/O lines in banks of

eight. Each bank can be configured as inputs or outputs. End users can drive

standard 5 Volt devices or power the device with an external supply to deliver up to

30 Volts, 3 A.

Features

MolexPinandSocketConnectors

The BH32 uses 1.57 mm Diameter Standard Molex Pin and Socket connectors on

the top panel. For pinouts, see “BH32 Technical Specifications” on page 17-30.

Power

The BH32 logic board is powered by either a 6-9V, 3A center-negative adapter

connected to the power input on the back panel of the device or by Power over

Ethernet (PoE) through the Ethernet Port (see “Ethernet Port” on page 17-20).

The BH32 Molex outputs can be driven by either the same power source as the

logic board (5V) or by an external power source connected to the ‘External Power’

connectors on the top of the device. The ‘External Power’ connectors allow you to

drive higher voltages/currents to external devices that require it, One connector can

be used to input a 5-30V, 3A external power source that is shared among all

Molex output connectors. A toggle switch on the back panel of the device determines

which power source is used for the Molex outputs. The Molex connector outputs are

always Active-Low.

17-18 System 3

BH32 Behavioral Cage Controller

Important! The two External Power Molex connectors on the top panel are shorted together; do

not use more than one external power source. The second external power connector

can be used to jumper the external power source to another BH32

VoltageModeToggle

This back panel switch toggles between 5 V and external power supply source for all

Molex output banks. Use 5 V mode for connections to mains power or PoE. Use

External Voltage mode for other external power sources up to 30 V.

PowerSwitch

The On/Off toggle switch turns the BH32 power off or on. The LED display will be

illuminated when the power is on.

StatusDisplay

The front panel display screen reports system status. The Mode button to the left

toggles the display modes.

The display modes include:

1. Device Number - how the BH32 is recognized on the network by other

devices

2. Bank Status - bank direction and current state of all bits in each bank

3. NetBIOS name and IP address:

4. IP address of paired RZ device (if paired). See “RZ Configuration” on

page 17-22.

Push and hold the Mode button for two seconds then release to automatically cycle

through all of the display items, displaying each for one second.

Push and hold the Mode button for 10 seconds to reset the Device Number.

I/OControl

The BH32 is a net appliance that was designed to be used under a variety of

conditions, not all of which are available from vendors of behavioral control systems.

At the most basic the TDT BH32 system can replace existing devices such as the

Med Associates, Colburn or Lafayette systems that interface to a standard operant or

behavioral box with input and output lines, where the output lines drive feeders, lick

meters and other devices that require more than a digital trigger. At the more

complex level the TDT system can be used to send and receive complex signals to

control multiple hardware devices.

Power Source Mode Max Total Output

Mains power 5 V 200 mA

PoE 5 V 100 mA

External power up to 30 V External Voltage 3 A

System 3 17-19

BH32 Behavioral Cage Controller

ReplicatinganExistingBehavioralControlSystem

The TDT system provides a unifying interface for sending and receiving behavioral

information from a behavioral control box without the need for the external devices

from these other companies.

TDT provides a default set up that uses standard Molex pins, an External power

source to drive high current and high voltage devices (such as feeders, water

delivery systems, foot shock systems, etc) or to accept inputs from such devices.

The hardware states of these particular interfacing devices are fixed and the BH32

bank directions and logic levels must be configured to match (see “Digital I/O ” on

page 17-19).

MoreComplexCustomSystemConfiguration

Information can be sent and received from the Molex interface in the following ways.

Note: Molex Banks A and B can be used as outputs and only outputs. Molex Bank D can

be used as inputs and only inputs. The direction and logic level of each bank is

configured through the BH32 web interface (See “Controller Configuration” on

page 17-23).

Important!: Attempting to drive an input from both the digital input and Molex connectors will

damage the device.

ControllingtheMolexoutputswithUDP/Serial(banksA&Bonly)

Configure the bank as an output. The Molex outputs are low when active. The digital

output logic is the inverse of the Molex output logic.

MonitoringtheMolexinputswithUDP/SerialandDigitalI/O(bankDonly)

Configure Bank D as an input. Active-Low means that when the Molex input is low,

the value is 1. The digital output logic mirrors the Molex input logic.

ControllingtheMolexoutputswithDigitalinputs(banksA&Bonly)

Configure the bank as an input, to bypasses the internal processor and control the

Molex lines directly. Molex output logic is the inverse of the digital input.

UsingDigitalandUDP/SerialI/Oonly

If the Molex connectors are not being used, then all four banks of digital I/O can

be used to send receive signals with the UDP/Serial interface with no restrictions on

bank direction.

DigitalI/O

The BH32 includes 32 bits of programmable I/O grouped in four 8-bit banks. Digital

I/O lines are accessed via the Digital IO–1 and Digital IO–2 25-pin connectors on

the back panel. Digital inputs accept +5V TTL inputs. Digital outputs are +5V. For

pinouts, see “BH32 Technical Specifications” on page 17-30.

StatusLights

A row of 32 status lights on the front panel report the state of the individual input/

output bits and are labeled to show banks A – D. When a bit is active, the

corresponding bit light glows red.

17-20 System 3

BH32 Behavioral Cage Controller

EthernetPort

The Ethernet port allows direct connections to a PC or network for communication

over UDP. The BH32 supports Power over Ethernet (PoE) technology using the

802.3AF PD standard. Use of Cat 5 (or greater) Ethernet cable recommended. The

BH32 can connect directly to a PC, an RZ device, or a network. If connecting

directly to an RZ device, a crossover Ethernet cable is required. See “BH32 Circuit

Design” on page 17-26, for more information on communicating with the BH32.

RS232

The BH32 can communicate with other devices over a serial port. See “BH32 Circuit

Design” on page 17-26, for more information.

DTE–ESwitch

This toggle switch determines whether the BH32 serial port is in master or slave

mode. This selects which wires on the BH32 serial port will be send and which will

be receive.

BH32Configuration

This section discusses configuring the BH32 networking communication and hardware

interfaces. See “RZ-UDP Communications Interface” on page 1-51, for more

information on the basics of networking and the various protocols.

Initialization

The BH32 will attempt to locate a DHCP server that will dynamically assign an IP

address to the device.

If no DHCP server responds, the following static IP configuration is used:

IP Address: 10.1.0.101

IP Mask: 255.0.0.0

Gateway: 10.1.0.1

In either case, dynamic or static, the interface IP address is associated with a

unique NetBIOS name set by TDT.

NetBIOSName

All BH32 devices will use this standard NetBIOS Name structure:

TDT_BHC_32_XXXX

XXXX = last 4 digits of the BH32 device serial number.

For Example:

A BH32 with a serial number of 1234 uses a NetBIOS name of:

TDT_BHC_32_1234.

Although a default NetBIOS name is assigned, the name can be changed using the

BH32 Web Interface. See below for more information.

Note: When connecting the BH32, be sure the network mask is set to a Class C or

smaller network. A Class A network mask (255.0.0.0) will disable NetBIOS naming

System 3 17-21

BH32 Behavioral Cage Controller

on the PC Ethernet interface. In such cases, the IP address of the BH32 must be

used instead.

ConfigurationthroughtheWebInterface

Every BH32 contains a minimal web server which is used for configuration and

monitoring. Options can be set here if no DHCP server is available. If a DHCP

server exists, the NetBIOS name associated with the dynamically assigned IP address

can be configured using the BH32 server.

To connect to the BH32 server:

Make sure there is an active connection from the PC to the Ethernet port on the

back of the BH32 then open an Internet browser such as Internet Explorer, Chrome

or Firefox.

•Enter the device’s IP address as the web address (e.g. http://10.1.0.100)

and press Enter.

•Enter the NetBIOS name as the web address (e.g. TDT_BHC_32_1001)

and press Enter.

Once connected, navigation to the BH32 web interface loads the Welcome page.

Clicking the links to the left of the web interface loads the corresponding page.

Welcome

The Welcome page provides basic information, allows real-time control of the BH32,

and provides feedback on the status of each Bank.

DeviceBox

The status of individual bits is displayed for each bank. Clicking bits on an Output

bank (red 0 or 1) will toggle that output bit and the corresponding LED on the

front panel of the BH32. This can be used to manually control the output of the

BH32 for testing a device connected to that output.

17-22 System 3

BH32 Behavioral Cage Controller

FirmwareVersion

Stack Version and Build Date refer to the version of software running on the

BH32.

UsernameandPassword

Server pages that modify the device configuration, such as the Setup and Network

Configuration pages, can only be accessed using a username and password. The

default values are displayed in the Welcome message. This login information can be

changed on the Network Configuration page.

To access a page that requires authentication:

1. Click the navigation link for the page.

2. When prompted, enter the username and password in the dialog box then

click Log In.

Default Username: admin

Default Password: pw

RZConfiguration

The BH32 can be paired with an RZ device that has a UDP interface. When any

of the BH32's I/O bits changes state, a 32-bit integer (one bit per I/O) is sent

via UDP packet to the RZ. Once this data is received on the RZ, it can be time

stamped and/or processed to provide real-time feedback.

System 3 17-23

BH32 Behavioral Cage Controller

ControllerConfiguration

Note: This page may require authentication. See “Username and Password” above, for

more information.

The Controller Configuration Page is used to configure properties of the BH32

hardware, including the Device Number, RS232 Baud Rate, and the behavior of

individual banks when accessed via the DB25 connectors on the back panel.

DeviceNumber

The Device Number is used to identify the BH32 among a network of BH32s. For

single BH32 use, this value should be set to 1.

Direction

Each Bank can be configured as either Input or Output.

LogicLevel

Each Bank can be configured to Active High (1 = True) or Active Low (0 =

True).

BaudRate

The desired rate can be entered in the RS232 Baud Rate box. The actual realizable

rate will be displayed in the Real Baud Rate box after the configuration has been

updated.

SavingorResettingtheConfiguration

Changes to the configuration are not implemented until they are saved and can be

reset to the default settings at any time.

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BH32 Behavioral Cage Controller

To make changes to the configuration:

•Type or select the desired values then click the Save Config button. The

Save Config button saves the current configuration settings and performs a

soft reset of the BH32 interface to load the settings.

To restore the default values:

•Click the Reset to Defaults button.

NetworkConfigurationPage

Note: This page may require authentication. See “Username and Password” on page 17-

22, for more information.

The BH32’s IP Address, host name and web username and password can be

changed on this page.

If the Enable DHCP check box is checked, the IP Address, Gateway Address,

Subnet Mask, and DNS server address values are overridden and automatically

configured by the DHCP server if available.

Note: These settings are reserved for connections that cannot locate a DHCP server. If no

DHCP server can be detected, contact your network administrator for applicable

settings.

To change the username and password:

1. Enter the desired new username and password in the Web User Name and

Web Password boxes.

2. Click the Save Config button.

Note: Once changed, you may need to re-enter the new username and

password to access pages that require authentication, such as the Network

Configuration or Setup pages.

System 3 17-25

BH32 Behavioral Cage Controller

To Change the Host name (NetBIOS name):

•Type the desired host name in the Host Name box and click the Save

Config button.

Note: The Host name can be no greater than 15 characters long and cannot

contain spaces or the following characters: \ / : * ? " ; | -

DirectConnectiontoaPC

The BH32 interface can be connected directly to a PC or laptop; however, it is

usually necessary to use an Ethernet crossover cable to connect the devices. Once

connected, several steps are required for the PC to recognize the UDP interface

connection. This method may be performed on any operating system which supports

TCP/IP.

To initialize the PC for a direct connection in Windows XP:

1. Physically connect the BH32 Ethernet interface and the PC via an Ethernet

crossover cable.

2. Click Start | Control Panel then double-click Network Connections.

3. Right-click the desired connection (this is usually a Local Area Connection)

and select Properties.

4. Select Internet Protocol (TCP/IP) or if there are multiples, select Internet

Protocol (TCP/IPv4).

5. Click the Properties button.

6. Select Use the following IP address and enter these values:

IP address: 10.1.0.x, where x can be any value from 1 to 254 except 100

or 101

Subnet mask: 255.255.255.0

Default gateway: Leave empty

7. Click OK.

The BH32 interface connection should now be recognized by the PC. Cycle power

on the BH32 device, the IP address of the BH32 will be 10.1.0.101.

17-26 System 3

BH32 Behavioral Cage Controller

BH32CircuitDesign

To communicate with an RZ device, the BH32 must first be paired with the RZ

device. See “RZ Configuration” on page 17-22, for more information. Once paired,

there are several circuit macros available to access the BH32 using the UDP

interface on an RZ device. If using one, two, three or four BH32s on the network,

use the RZ_BH_Send_1-4Ch and RZ_BH_Rec_1-4Ch macros. If using more than

four BH32s, use the RZ_BH_Send_MC and RZ_BH_Rec_MC macros. All macros can

be configured to specify the number of BH32s, which corresponds to the size of the

underlying UDP packets.

RZ_BH_SendMacros

The RZ_BH_Send macros are used to send 32-bit words from the RZ over UDP to

BH32 devices numbered from 1 to 4. The macro automatically sends a new packet

if any of the Inputs change value. The 32-bit integer represents the current state of

all I/O on the BH32 device. The ordering is as follows:

| Bit31 …………………………………. Bit0 |

| A8 … A1 | B8 … B1 | C8 … C1 | D8 … D1 |

Example:

To change the state of D1 on BH32 Device Number 2, toggle the first bit of Input-

2 of RZ_BH_Send_1-4Ch or channel two of RZ_BH_Send_MC’s Input.

An output labeled “Busy” indicates if the macro is currently in the process of

sending out a packet. The duration of the busy signal is dependent on the number

of BH32 devices (it takes NumberOfDevices+2 samples to send a packet).

Note: Since the data packets are sent serially, it is recommended that the macro inputs

are latched during transmission to ensure that the packet contains data from the

same sample in time.

RZ_BH_RecMacros

The RZ_BH_Rec macros are used to receive 32-bit words from networked BH32

devices through the RZ UDP port. The structure of each 32-bit word is described in

the Packet Structure section below.

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