User manual
13-4 Digital I/O Port, Output Enable, & Output Configuration 2400 Series SourceMeter
®
User’s Manual
Figure 13-2
Sink operation
Source operation
Figure 13-3 shows the basic output configuration for source operation. In this
case, the external relay coil is connected between the digital output line (pins 1 to
4) and ground (pin 9). With this configuration, the digital output line must be set HI
to energize the relay, and the maximum source current is 2mA.
Figure 13-3
Source operation
Controlling digital output lines
Although the digital output lines are primarily intended for use with a device han-
dler for limit testing, they can also be used for other purposes such as controlling
external relays or indicator lights. You can control these lines either from the front
panel or via remote as covered below.
SourceMeter External
Relay
To other
Circuits
+5V
Maximum sink current: 500mA
Pins 1-4
Pin 9
Digital I/O
Port
Pin 7
SourceMeter
External
Relay
To other
Circuits
+5V
Maximum source current: 2mA
Pin 7
Pins 1-4
Pin 9
Digital I/O
Port