1794-OW8 Flex IO 继电器输出模块

Description

1794-OW8 Flex IO 继电器输出模块

Allen-Bradley 1794-OW8是一个继电器输出模块，是Flex I/O产品系列的一部分。该模块主要具有八(8)个隔离常开(no . o)机电继电器，额定250V AC, 2a, 50/60Hz电阻负载;120/240V AC, 50/60Hz,1800V A通，180V A断;5…30V DC, 2a，电阻;

1794-OW8与1794-TB2、1794-TB3、1794-TB3S、1794-TBN和1794-TBNF端子基单元配套使用。如果使用1794-TBNF，请使用3.0安培，250VAC慢熔保险丝或Allen-Bradley推荐的保险丝。239003号。该模块通过缓冲电路具有1.0 mA的断态泄漏电流，最小接触负载额定值为100 μA @ 100 mV DC。它的飞行员负荷额定值为r150,5…30V DC, 28V DC以下不超过1a。

1794-OW8兼容使用任何任何Flex I/O通信适配器以及与FlexBus控制器。该模块电流为5V DC, 35ma，电源额定电压为24V DC, 125ma。继电器输出通道在初始接触电阻为30 mΩ时，两个信号转换的最大信号延迟为10 ms，开关频率为每3秒或0.3Hz，在额定负载下，触点平均弹跳时间为1.2 ms。此外，每个输出触点的预期触点寿命为100,000次操作，最小@额定负载。

1794-OW8安装有8个黄色状态指示灯，每个通道1个，安装在端子座上时按键开关位置为9。

1794-OW8的电源端子只使用+24伏直流电源，因为输出继电器开关时间的变化可能导致其中一个继电器瞬间切换总负载电流。整个模块的尺寸为1.8 x 3.7 x 2.1英寸。它兼容多种终端基础单元，即1794-TB3、1794-TB2、1794-TBN、1794-TB3S、1794-TB3K、1794-TBNF、1794-TBNKF和1794-TB3SK。在额定负载下，它的机械寿命为10万次。1794-OW8的电阻继电器输出电流额定值在5至30伏直流时为2安培，在125伏直流时为0.22安培，在125伏直流和250伏直流时为2安培。该模块还具有250伏的连续隔离电压，用于继电器到另一个继电器、背板和电源，以及50伏的电源到背板。该模块的外部直流电源电压范围为直流19.2至31.2伏，包括5%的交流纹波和125 mA的标称外部直流电源电流。在240伏交流电时，通过缓冲器的最大断开状态泄漏电流为1毫安。1794- ow8<e:2>的初始接触电阻为30 M Ω，在100 mV DC下的最小接触负载为100µA。在31.2伏直流电压下，最大功耗为5.5瓦，最大散热为18.8英热单位/小时。OFF到ON和ON到OFF状态的最大输出延迟时间都是10毫秒。

1794-OW8

1794-OW8 Flex IO 继电器输出模块

The Allen-Bradley 1794-OW8 is a Relay output module that is part of the Flex I/O product family. This module primarily features Eight (8) isolated Normally Open (N.O.) electromechanical relay that are rated 250V AC, 2 A, 50/60Hz for resistive load; 120/240V AC, 50/60Hz,1800V A Make, 180V A Break; 5…30V DC, 2 A, Resistive;

The 1794-OW8 is used with 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN and 1794-TBNF terminal base units. If 1794-TBNF is used, use a 3.0 Ampere, 250VAC slow-blow fuse or the Allen-Bradley recommended fuse Littelfuse with part. number 239003. This module has a off-state leakage current of 1.0 mA through snubber circuit with minimum contact load rating of 100 μA @ 100 mV DC. It has a pilot duty rating of R150, 5…30V DC, 28V A not to exceed 1 A below 28V DC.

The 1794-OW8 is compatible for use any any Flex I/O communication adapters as well as with FlexBus controllers. This module has a current draw of 5V DC, 35 mA with supply voltage rating of 24V DC, 125 mA. The relay output channels has a maximum of signal delay 10 ms for both signal transitions while the initial contact resistance is 30 mΩ, switching frequency of 1 operation every 3 s or 0.3Hz at rated load and contact mean bounce time of 1.2 ms. Additionally, each output contact has an expected contact life of 100,000 operations, min @ rated loads.

The 1794-OW8 is installed with Eight (8) yellow status indicators, One for each channel and has a keyswitch position of 9 when mounting to the terminal base.

Use only +24 Volts DC power for the 1794-OW8’s power terminals because variations in relay switching time of the outputs may cause one of the relays to momentarily switch the total load current. The entire module measures 1.8 x 3.7 x 2.1 inches. It is compatible with several terminal base units, namely the 1794-TB3, 1794-TB2, 1794-TBN, 1794-TB3S, 1794-TB3K, 1794-TBNF, 1794-TBNKF, and the 1794-TB3SK. It also has a mechanical life of 100,000 operations at rated loads. The resistive relay output current ratings of the 1794-OW8 are 2 Amps at 5 to 30 Volts DC, 0.22 Amps at 125 Volts DC, and 2 Amps for 125 Volts DC and 250 Volts DC. The module also has a continuous isolation voltage of 250 Volts for relay to another relay, to the backplane, and to the power, and 50 Volts for power to the backplane. The external DC supply voltage range of this module is 19.2 to 31.2 Volts DC and it includes the 5% AC ripple and a nominal external DC supply current of 125 mA. It has a maximum off-state leakage current of 1 mA at 240 Volts AC through a snubber. The 1794-OW8’s initial contact resistance is 30 M Ω and its minimum contact load is 100 µA at 100 mV DC. It also has a maximum power dissipation of 5.5 Watts and a maximum thermal dissipation of 18.8 BTU/hour, both at 31.2 Volts DC. The maximum output delay time for both the OFF to ON and the ON to OFF states are 10 milliseconds.