Download - R&M Materials Handling equipment
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R&M <strong>Materials</strong> <strong>Handling</strong>, Inc.<br />
4501 Gateway Boulevard<br />
Springfield, Ohio 45502<br />
P.: (937) 328-5100<br />
FAX: (937) 325-5319<br />
3.4 Brake controllers<br />
3.4.1 REC12<br />
Brake control unit REC12 is a line voltage half-wave rectifier for DC-brakes.<br />
Voltage range<br />
200...690Vac<br />
AC Line Voltage<br />
Output voltage U DC<br />
Half wave 0.45 x U AC<br />
Maximum current<br />
1.25Adc<br />
K7<br />
K7<br />
L1-1 L1-2<br />
L2<br />
a<br />
K7<br />
K7<br />
b<br />
REC12<br />
Brake<br />
When the brake is opened, the brake contactor K7 connects two phases of mains voltage to terminals L1 and<br />
L2. In addition, the brake contactor shorts terminals a and b thus making the DC-circuit.<br />
To close the brake, the brake contactor disconnects the supply to terminals L1 and L2. The released brake<br />
contactor also opens the brake coil DC-circuit, which speeds closing of the brake. The purpose of the varistor<br />
there is overvoltage protection for K7 contacts and the brake coil.<br />
3.4.2 ESD141<br />
Brake control unit ESD141 is a line voltage full/half-wave rectifier for DC-brakes.<br />
Voltage range<br />
200...690Vac<br />
AC Line Voltage<br />
Output voltage U DC<br />
Full wave 0.90 x U AC<br />
Half wave 0.45 x U AC<br />
K7<br />
K7<br />
Maximum current<br />
1.25Adc continuous and 2.5Adc at ED5%<br />
K7<br />
Set 0.3s<br />
3<br />
2<br />
1<br />
4<br />
K7<br />
K7<br />
5<br />
ESD141<br />
6 7<br />
Brake<br />
When the brake is opened, the brake contactor K7 connects two phases of mains voltage to terminals 1, 2 and<br />
3, which makes the device a full wave rectifier. The full wave mode is used to get the brake open fast. In<br />
addition, the brake contactor shorts terminals 4 and 5 thus making the DC-circuit.<br />
25/79<br />
This document and the information contained herein, is the exclusive property of R&M <strong>Materials</strong> <strong>Handling</strong> Inc. and represents a non-public, confidential and proprietary<br />
trade secret that may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M<br />
<strong>Materials</strong> <strong>Handling</strong> Inc. Copyright © (2005) R&M <strong>Materials</strong> <strong>Handling</strong> Inc. All rights reserved.
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