12
vacon • 202 Brake chopper unit (NXB)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Vibration
EN 50178/EN 60068-2-6
5…150 Hz
Displacement amplitude 0.25 mm (peak)
at 3…31 Hz
Max acceleration amplitude 1 G at 31…150 Hz
Shock
EN 50178, EN 60068-2-27
UPS Drop Test (for applicable UPS weights)
Storage and shipping: max 15 G, 11 ms (in
package)
Cooling capacity required See Table 15.
Unit enclosure class IP00/Open Frame standard in entire kW/HP range
Pollution degree PD2
EMC Immunity
Fulfils IEC/EN 61800-3 EMC immunity
requirements
Safety
CE, UL, IEC/EN 61800-5-1 (2007)
(see unit nameplate for more detailed approvals)
IEC 60664-1 and UL840 in overvoltage category III.
Control connections
Analogue input voltage
0…+10 V, Ri = 200 kW, (–10 V…+10 V joystick
control)
Resolution 0.1%, accuracy ±1%
Analogue input current 0(4)…20 mA, Ri = 250 W differential
Digital inputs (6) Positive or negative logic; 18…30 VDC
Auxiliary voltage +24 V, ±10%, max. 250 mA
Output reference voltage +10 V, +3%, max. load 10 mA
Analogue output
0(4)…20 mA; RL max. 500 W; Resolution 10 bit;
Accuracy ±2%
Digital outputs Open collector output, 50 mA/48 V
Relay outputs
2 programmable change-over relay outputs
Switching capacity: 24 VDC/8 A, 250 VAC/8 A,
125 VDC/0.4 A
Min. switching load: 5 V/10 mA
Protections
Overvoltage trip limit
NX_5: 911 VDC
NX_6: (CH61, CH62, CH63 & CH64): 1258 VDC
NX_6: (Other chassis): 1200 VDC
NX_8: (CH61, CH62, CH63 & CH64): 1300 VDC
Undervoltage trip limit
NX_5: 333 VDC; NX_6: 461 VDC; NX_8: 461 VDC
(all VDC)
Overcurrent protection Yes
Unit overtemperature
protection
Yes
Resistor overtemperature
protection
Yes
Wrong connection
protection
Yes
Short-circuit protection
of +24 V and +10 V
reference voltages
Yes
Table 97. Technical specification for VACON
®
NXB Liquid-Cooled brake chopper unit
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