Precision Digital PD138 - Manual (Page 19)

PD138 Minimux
®
II Temp & Process Scanner Instruction Manual
19
EXTERNAL SIL, ACK, & STOP/GO CONNECTIONS
Terminals at the rear of the instrument allow the functions of the
SILENCE, ACK, and STOP/GO buttons to be performed externally. For
instance, if the PD138 is mounted inside a NEMA 4X enclosure,
switches mounted outside the enclosure could be wired to these
terminals to provide the user with access to the SILENCE, ACK, and
STOP/GO functions.
PROGRAMMING OVERVIEW
The PD138 is programmed for scanning and alarm functions using the
front panel buttons and a three-position DIP switch. The DIP switch is
used to program the following:
DIP
Position
Function
1 Stopping-on-alarm or continuous scan-on-alarm
2 Sequence A or F2A alarm operation
3 Relay fail-safe or normal operation
The DIP switch is located on the back of
the unit. These switches program the
unit for alarm Sequence A or F2A, stop-
on-alarm, and for fail-safe operation.
DIP Switch