Series 3700A Switch and Control Cards Reference Manual
Section 11: Model 3732 quad 4x28 reed relay matrix card
3700AS-909-01 Rev. A / Preliminary
11-3
Measurement considerations
The Model 3732 uses two 78-pin male D-sub connectors for signal connections. The detachable
Models 3732-ST-R and 3732-ST-C screw terminal assemblies can be used for row and column
expansion (the Model 3732-ST-C can also be used for direct connections).
Channel specifiers
The Series 3700A mainframe supports a wide variety of cards. Functional elements on these cards
are referred to as "channels." Individual elements on each card (switch, relay, digital to analog
converter (DAC), digital I/O, and so on) are referenced with a channel specifier. These specifiers
specify channels for use with close and open operations, scans, and channel patterns using the front
panel, web, or remote command interface.
A channel specifier is a four or five-digit alphanumeric sequence. The first digit is always the slot
number of the card in the mainframe. The remaining digits vary depending on the type of card.
Channel types
There are six channel types used to control relays:
•
Multiplexer (MUX)
•
Matrix
•
Backplane
•
Digital I/O
•
Totalizer
•
Digital analog converter (DAC)
The channels available on a card are defined by the type of card. The documentation for your specific
card lists the available channels.
Specify multiple channels using lists and ranges (a sequence of channels). Lists and ranges build
upon the individual channel specifier.
The following topics describe the channel specifier in more detail and provide generic examples
(which may or may not be suitable for your installed cards).
Channel and backplane notation
There are four different notation styles used to control relays:
1. MUX (multiplexer) channel notation
2. Channel
specifiers
3. Backplane relay notation
4. Digital I/O, totalizer, and DAC notation
MUX (multiplexer) channel notation
To specify channels using the multiplexer (MUX) card notation, use SCCC, where:
S = slot number
CCC = Channel number (always use 3 digits)