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Ndrive HP Options
Ndrive HP 10/20/30 User’s Manual
4-4 www.aerotech.com
4.1.3. Brake / Relay (TB301)
The relay output is typically used to automatically drive a fail-safe brake on a vertical
axis, however, it may also be used as a general purpose relay. See the
BrakeOnDriveDisable axis parameter for information on activating the brake output
automatically, or the BRAKE command for manually toggling the output, both in the
Nview HMI help. In order to help the user to interface to the brake relay the remainder of
this section will be presented as a step-by-step procedure.
Step #1 Brake Relay Specifications
The user must verify that the application will be within the specifications of the Brake
Relay contacts. These specifications are provided below in Table 4-4.
Table 4-4.
Voltage and Current Specifications (TB301)
Relay K1 Contact Ratings
Maximum Switched Voltage
150 VDC, 125 VAC
Maximum Switched Current
1A
Maximum Carrying Current
1A
Maximum Switched Power
30W (DC), 60 VA (AC)
Note: The maximum power that may be switched is voltage dependent.
Initial Contact Resistance
50 milliohms max. @ 10 mA, 6 VDC
The user must not exceed the Maximum Current or
Maximum Power specifications.
Step #2 Select Brake Interface Connector
The Normally Open (N/O) contacts of the Brake Relay are accessible through TB301 and
the Motor Feedback connector (J207). The Normally Closed (N/C) contact of the Brake
Relay is only accessible through TB301 (Figure 4-4). The Motor Feedback connector
(J207) allows the brake wires to be included in the motor feedback cable and eliminate
the need for a separate brake cable.
Table 4-5.
Brake / Relay Connector Pin Assignment (TB301)
Pin #
Label
Description
In/Out
3
Relay-N.C.
(Brake) Relay Output Normally Closed Contact
Output
4
Relay-Com.
(Brake) Relay Output Common Contact
Output
5 Relay-N.O.
(Brake) Relay Output Normally Open Contact
(See JP1-A, JP1-B)
Output
Table 4-6.
Brake / Relay Connector Pin Assignment (J207)
Pin #
Label
Description
In/Out
13 Brake
-
(Brake-) Relay Output Normally Open Contact
(See JP1-A, JP1-B)
Output
25
Brake +
(Brake+) Power connection (See JP1-A, JP1-B)
Output
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