NI 186135H-01L总线拓展模块GPIB-140A可将GPIB系统的线缆延长一千米，而不会影响GPIB的完整性，也无需修改软件。该配件使用缓冲传输技术，数据传输速率高达1.1 Mb/s (IEEE 488.1)或2.8 Mb/s (HS488)。GPIB-140A还可以将GPIB系统中GPIB设备的最大数量从15个增加到26个。
模块特性
额定电压24VDC
输入电压范围0–30 VDC
24 VDC时，用户输入电流每点7.5 mA
隔离：用户对逻辑的输入，
用户输入到机架接地，
NI 186135H-01L总线拓展模块GPIB-140A
组到组
250 VAC连续，1500 VAC持续1分钟。无隔离
在组中的各个点之间。
每个点1个LED指示灯显示单个点的状态
PWR LED指示现场和背板电源已接通
接口单元电源中母线的电流
75 mA，典型（所有点开启）
83 mA，最大值
输入特性
典型输入阻抗3K
开启状态电压正逻辑：+15V至+30V
负逻辑：–15V至–30V
关断状态电压正极逻辑：0至+5V
负逻辑：0至–5V
On状态电流
断开状态电流
3.0mA至8mA
0mA至1.5mA
On响应时间
关闭响应时间
通常为6ms，最大10ms
通常为6ms，最大10ms
Module Characteristics
Rated Voltage
24VDC
Input Voltage Range
0–30 VDC
User Input Current
7.5 mA per point @ 24 VDC
Isolation: User input to logic,
user input to frame ground,
group to group
250 VAC continuous, 1500 VAC for 1 minute. No isolation
between individual points in a group.
Indicators
1 LED per point shows individual point status
PWR LED indicates field and backplane power are pres
ent
Current drawn from Bus In
terface Unit Power Supply
75 mA, typical (all points on)
83 mA, maximum
Input Characteristics
Input Impedance
3K typical
On state voltage
Positive logic: +15V to +30V
Negative logic: –15V to –30V
Off state voltage
Positive logic: 0 to +5V
Negative logic: 0 to –5V
On state Current
Off state Current
3.0mA to 8mA
0mA to 1.5mA
On response time
Off response time
6ms typical, 10ms maximum
6ms typical, 10ms maximum
