Comtech EF Data OMS11 - Manual (Page 36)

OMS11 1:1 Redundancy Switch Connector Pinouts
TM133 – Rev. 1.1 5-3
Table 5-4. DC Power
A – VDC
B + VDC
C Ground
D N/C
5.3 Ground Lug
An external chassis ground post is located on the OMS11, which requires a #10-32 threaded
stud.
PROPER GROUNDING PROTECTION: During installation and setup, the
user must ensure that the unit is properly grounded. The equipment shall
be connected to the protective earth connection through the end use
protective earth protection.
5.4
Remote Monitor & Control (J8)
This port functions as the OMS11 Remote and Fault port utilizing an 18-Pin D38999/24FD18PN
Connector. The Remote Port located on J8 allows for control and monitoring of parameters and
functions via an RS-232 Serial Interface or RS-485 for RLLP Protocol. ‘Equipment remote setup
parameters can be configured via the main board or Terminal mode. Based on the user's
application, this may require the user to set the Remote Port, properly configuring the units for
Multidrop Address followed by setting the Remote Interface from RS232 to RS485.
The mating connector is supplied with the unit. Refer to Table 5-5 for the Remote/Terminal
connector pinouts.
The OMS11’s internal M&C system is connected to most of the circuitry on any board contained
in the chassis. These connections provide status on the condition of the circuitry and provide the
data required for the various measurements the OMS11 provides. The on-board M&C processes
this information and generates status indications and alarms when necessary. Status information
is available via the Remote port and the Form-C fault connections available on this connector.
This summary information can be connected to external equipment or alarms. Refer to Table 5-3.
5.4.1 Terminal Mode (RS232)
The Terminal Mode has the advantage of providing full screen access to the switches
parameters, but requires a separate terminal or computer running a Terminal Program. No
external software is required other than VT-100 Terminal Emulation Software (e.g. “Procomm”
for a computer when used as a terminal. The Control Port is normally used as an RS–232