NI 186135H-01L總線拓展模塊GPIB-140A可將GPIB系統的線纜延長一千米，而不會影響GPIB的完整性，也無需修改軟件。該配件使用緩沖傳輸技術，數據傳輸速率高達1.1 Mb/s (IEEE 488.1)或2.8 Mb/s (HS488)。GPIB-140A還可以將GPIB系統中GPIB設備的最大數量從15個增加到26個。
模塊特性
額定電壓24VDC
輸入電壓范圍0–30 VDC
24 VDC時，用戶輸入電流每點7.5 mA
隔離：用戶對邏輯的輸入，
用戶輸入到機架接地，
NI 186135H-01L總線拓展模塊GPIB-140A
組到組
250 VAC連續，1500 VAC持續1分鐘。無隔離
在組中的各個點之間。
每個點1個LED指示燈顯示單個點的狀態
PWR LED指示現場和背板電源已接通
接口單元電源中母線的電流
75 mA，典型（所有點開啟）
83 mA，最大值
輸入特性
典型輸入阻抗3K
開啟狀態電壓正邏輯：+15V至+30V
負邏輯：–15V至–30V
關斷狀態電壓正極邏輯：0至+5V
負邏輯：0至–5V
On狀態電流
斷開狀態電流
3.0mA至8mA
0mA至1.5mA
On響應時間
關閉響應時間
通常為6ms，最大10ms
通常為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
