User`s manual

Using the Relay Multiplexer Modules 31Chapter 3
Chapter 3
Using the Relay Multiplexer Modules
Using This Chapter
This chapter uses typical examples to show how to use the 16-Channel Relay
and 16-Channel Thermocouple Relay Multiplexer Modules. Refer to
Chapter 4 (“Understanding the Relay Multiplexer Modules”) for more
information. This chapter contains the following sections:
• Multiplexer Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31
• Connecting Switchbox Channels to Common . . . . . . . . . . . Page 32
• Connecting Switchbox Channels to Tree Terminals for
Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 34
• Scanning a Range of Switchbox Channels . . . . . . . . . . . . . . Page 36
• Measuring Temperature Using Thermocouples
(E1344A and E1347A Module only) . . . . . . . . . . . . . . . . Page 39
Multiplexer Commands
Table 3-1. Multiplexer Commands in Chapter 3
Command Description
ARM:COUN <number> Selects multiple scanning cycles.
INIT[:IMM] Starts scanning process; use the [ROUT:]SCAN command
to select channels for scanning.
INIT:CONT 1|0|ON|OFF Enables/disables continuous scanning cycles.
[ROUT:]CLOS <channel_list> Closes all channels in channel list.
[ROUT:]CLOS? <channel_list> Queries mainframe for channel closure.
[ROUT:]OPEN <channel_list> Opens all channels in channel list.
[ROUT:]SCAN <channel_list> Closes all channels in channel list one at a time; previous
channel opens before next channel closes.
[ROUT:]SCAN:MODE FRES Automatically closes paired channel relays (e.g., channels
01 and 09) during 4-wire ohms measurements and
scanning.
[ROUT:]SCAN:PORT ABUS Automatically closes the tree switches while scanning.
NOTE: The commands with brackets ([ ]) are implied and are not shown in this chapter