EA EA-HV 900 Series, Manual

Page: 9 / 18

© EA Elektro-Automatik, DE-41747 Viersen, Helmholtzstr. 31-33, Tel. 02162-3785-0, Fax. 02162-16230
9
B
模式的指示
如果
"CV"
灯亮，本机可当恒压源操作。而
"CC"
灯则指示产
品可当恒流源操作。这两种操作可自动转换。
过载保护和电流调整
输出端有连续短路保护功能。最大输出电流可从零连续上
调至额定电流值。
功率因素校正
(PFC)
主动式功率因素校正电路在电源输入端能达到大于
0.98
的功
率因素值。因此无功电流几乎为零，有功电流为正弦形状。
远端编程输出电压和电流
通过模拟接口可从外部控制输出电压和电流，也可监控它们
的实际值。最大额定电压和电流值被标准化成
10V
，且精确
度
<0.2%
。各个输出端都有监控信号。
引脚
7 = I
MON
引脚
8 = U
MON
监 控 线 尾 部 应 焊 接 一 电 阻 （ 如 ：
100k
） 和 电 容 （
如：
470nF
）进行终止。监控输出端有短路保护，允许最
大负载为
1mA
。连接线应屏蔽。屏蔽线必须连到引脚
10
(GND)
。
15
针
Sub-D
插头外壳接到
PE
，但不可连到监控线的屏蔽线
上。
电压和电流值都可通过高阻抗控制输入脚设定。
所供
15
针
Sub-D
插头的
3
和
4
脚（电压）与
5
和
6
（电流）脚需
空着。
+
参考
2
脚要连到电位器的一边，
0V
参考
1
脚则连到它
的另外一边。电位器的滑动件需分别连到
UPS 3
脚（电压）
和
IPS 5
脚。
2
脚和
4
脚不连。
远程开/关
本机可通过控制输入脚
SB
（
9
脚）转至待机模式（输出电
压被关断）。利用继电器接点或三极管的开集将
9
脚连到
+5V 12
脚即可实现。断开该连接后，输出被再次打开，并
上升至预设值。
Mode indication
If the LED "CV" is lit, the unit operates as a constant volt-
age source, while the LED "CC" indicates that the unit is
operating as a constant current source. The change-over
happens automatically.
Overload protection and current regulation
The output is protected against a continuous short-circuit.
The max. output current is continuously adjustable from
zero up to the rated current.
Power factor correction (PFC)
The active power factor correction circuit achieves a power
factor on the mains input of better than 0.98. So the reac-
tivecurrent becomes nearly to zero and the active current
is sine wave shaped.
Remote programming of output voltage and current
It is possible to control output voltage and current externally
via the analogue interface as well to monitor the actual
values externally. The maximum rated voltage and current
values are standardized to 10V with an accuracy of <0.2%.
The monitor signals are available on the respective outputs.
Pin 7 = I
MON
Pin 8 = U
MON
The end of the monitor cable should be terminated by a
resistor (e.g. 100k Ohm) and a capacitor (e.g. 470nF). The
monitor outputs are short-circuit protected and the max.
load is 1mA. The cable should be screened. The screen
must be connected to Pin 10 (GND).
The housing of the 15-pole Sub-D plug is connected to PE
and may not be connected to the screen of the monitor
cable.
The voltage and current values can both be set via the high
impedance controle inputs.
The connections on the supplied 15-pole plug on Pin 3
and 4 (Voltage) and Pin 5 and 6 (current) must be opened.
The + reference Pin 2 is to be connected to one side of a
potentiometer and the 0V reference Pin 1 to the other side
of the potentiometer. The slider of the potentiometer must
be connected to UPS Pin 3 (Voltage) resp. to IPS Pin 5
(Current). Pin 2 and Pin 4 are not connected.
Remote on/off
Through the control input SB (Pin 9) the unit can be switched
into standby mode (output voltage off). This is effected by
connecting Pin 9 to +5V Pin 12 through a relay contact or
a transistor with open collector. After opening this connec-
tion the output is switched on again and rises up to the
preset value.
描述
/ Description