Stanford Research Systems SIM984, Руководство по эксплуатации и обслуживанию

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1 – 4 Getting Started
output o
ff
set through the front-panel access hole in the “OUTPUT”
block.
1.3 SIM Interface
The primary connection to the SIM984 Isolation Amplifier is the rear-
panel DB–15 SIM interface connector. Typically, the SIM984 is mated
to a SIM900 Mainframe via this connection, either through one of the
internal Mainframe slots, or the remote cable interface.
It is also possible to operate the SIM984 directly, without using the
SIM900 Mainframe. This section provides details on the interface.
The SIM984 has no internal protection against reverse polarity, missing
CAUTION
supply, or overvoltage on the power supply pins. Misapplication of power
may cause circuit damage. SRS recommends using the SIM984 together
with the SIM900 Mainframe for most applications.
1.3.1 SIM interface connector
The DB–15 SIM interface connector carries all the power and commu-
nications lines to the instrument. The connector signals are specified
in Table 1.1
Direction
Pin Signal Src
⇒
Dest Description
1 SIGNAL GND MF
⇒
SIM Ground reference for signal
2
−
STATUS SIM
⇒
MF Status
/
service request (GND
=
asserted,
+
5 V
=
idle)
3 RTS MF
⇒
SIM HW handshake (not used in SIM984)
4 CTS SIM
⇒
MF HW handshake (not used in SIM984)
5
−
REF 10MHZ MF
⇒
SIM 10 MHz reference (no connection in SIM984)
6
−
5 V MF
⇒
SIM Power supply (no connection in SIM984)
7
−
15 V MF
⇒
SIM Power supply
8 PS RTN MF
⇒
SIM Power supply return
9 CHASSIS GND Chassis ground
10 TXD MF
⇒
SIM Async data (start bit
=
“0”
= +
5 V; “1”
=
GND)
11 RXD SIM
⇒
MF Async data (start bit
=
“0”
= +
5 V; “1”
=
GND)
12
+
REF 10MHz MF
⇒
SIM 10 MHz reference (no connection in SIM984)
13
+
5 V MF
⇒
SIM Power supply
14
+
15 V MF
⇒
SIM Power supply
15
+
24 V MF
⇒
SIM Power supply
Table 1.1: SIM Interface Connector Pin Assignments, DB-15
SIM984 Isolation Amplifier