18-4
OP27, OP37 Equipment Manual
Release 05/99
7. Fit the side panel so that the sliders
º
firmly position the edges of the
inserted AT cards. Secure the side panel using five screws
»
(Figure 18-3).
8. Connect the peripheral unit to the AT cards.
The AT cards and the AT expansion slots are disassembled in the reverse order.
18.2
Direct Key Module
A Direct Key Module (DKM) is available as an option for connection to opera-
tor panels OP27 and OP37. The following versions are possible:
Operating unit
Direct key module with
8 outputs
16 outputs
OP27
–
OP37
–
The housing is screwed to the rear of the OP. It can be retrofitted at any time.
The Direct Key Module (DKM) must be implemented where fast keyboard
operation is required without any communication–related delays. Example:
Direct key control for jog operation.
The direct keys can be driven by hardware or software.
The hardware–based operation of the direct keys (typing mode) is per-
formed by the directly wired OP function keys located to the left and right
of the display. There are eight function keys on the OP27 and twelve on the
OP37.
Direct keys can also be operated via software using messages, if configured
in ProTool.
The direct key module provides the following digital outputs:
for operation via software – 1 x 8 (OP27) or 2 x 8 (OP37) and
for operation via hardware – 1 x 8 (OP27) or 2 x 6 (OP37)
Use the DIL switch on the direct key module to select whether operation is to
be via software or hardware.
The digital outputs are galvanically isolated from the OP by means of opto-
couplers. Consequently, the boards require a dedicated voltage supply.
Function of the
direct key module
External power
supply
Options
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