Installation manual

Hardware installation283
Hardware Installation
With the MI 3040 General Purpose / Tally Interface, an external device can transmit commands to, and receive status
from, a Saturn Master Control Switcher. In this application, the MI 3040 is configured in software as an MI 3040IO.
It will be referred to as such for the balance of this discussion. (In terms of hardware, the MI 3040IO and MI 3040
are identical.)
Optocoupler inputs
Commands such as Take and Key In 1 can be sent from the external control device to the optocoupler inputs; these
respond to a differential voltage between the two input pins. For hardware details, including a drawing of the rear panel,
please see MI/MC 3040 Hardware Overview in Section 2 of the Jupiter Installation and Operating manual. In the
Media Pool application shown in Figure 257, two of the GP Out connectors on the VR 8000 Video Record/Play unit
are connected to two of the MI 304IO optocoupler inputs. The functions of the GPI connectors are shown on page 285.
Relay outputs
Status information can be returned from the Saturn to the MI 3040IO relays, which are suitable for lowvoltage (<100
V), lowcurrent (<300 milliamps) applications. Each relay may be configured by slide switch for NormallyOpen or
NormallyClosed operation. The functions of the GPO connectors are shown on page 285. This table assumes that the
slide switches for all relays are set to Normally Open.
MPK connection
The MI 3040IO must be connected to the MPK port on the Saturn video processor. There can be only on MI 3040IO per
system (channel) designated as a GPI/O interface.
Software Configuration
An entry must be made in the MPK Device Table for the MI 3040IO. For more information, see Step 7(d) on page 38.
For the Media Pool application shown in Figure 257, the function of each GP Out connector on the VR Video Record/
Play unit would be determined by the Media Pool software configuration. For more information, please refer to Config-
uring Instances in Section 3 of the Media Pool Installation and Operating manual.
An MI 3040IO can only be used for GPI/O applications. It cannot be used for other MI 3040 functions (such as tally or
machine control).