MODEL 2310 AL MCS-11 REMOTE ENCODER
FIAL INCORPORATED
FC2310_AL-20040506
9
input board is installed in the unit. The connector has separate pins for station ground and analog
ground. These are connected together at the 'common' measurement point on the analog board.
Single ended measurements may be connected between an analog input pin and either station
ground or analog ground. For the most accurate measurements, a pair of wires should run from
the device being measured to the model 2310 AL, with the 'ground' wire connected to an analog
ground pin and the active wire connected to the analog input pin. A shielded wire is recommended
for electrically noisy environments, and a shielded pair is recommended for differential input
measurements.
The analog inputs are low pass filtered. There is no attenuation for frequencies below 1 Hertz. A
60 Hertz signal is attenuated 14.5 times relative to DC. See
Table 2
on page 6 for attenuation data
for other frequencies.
Configuring the 2310 AL (with either the craft port interface or Windows programs) to report MCS-
11 analog scanner points without having installed an analog-input board is an error condition. This
error causes the front panel Unit Fail LED to blink three times, pause, then repeat.
MCS-11 PORTS:
There are two MCS-11 ports on the back of the unit. You may select RS-422 or
RS-232 operation for each port with the configuration software. For RS-422 operation, both MCS-
11 ports can be operated as DTE (accepting clock from other units). In addition, MCS-11 Port #2
can be changed to DCE (providing clock to other units). If DCE operation is selected in the
configuration program, the unit's cover must also be removed and an internal slide switch (
S1
)
operated. This switch setting
MUST
match the setting downloaded from the configuration program.
The configuration program is used to set the DTE / DCE mode and the clock rate for the DCE port.
Figure 6. DCE VERSUS DTE SELECTOR SWITCH
The configuration software can also select the addresses to bridge across the MCS-11 ports. If
any addresses have been specified for bridging, then MCS-11 polls and answers for those selected
addresses, arriving at either MCS-11 port, are re-transmitted out the other MCS-11 port. The unit
may also be configured to either send out its own answers (replies to polls) on both ports, or only
on the port from which the poll was received. The typical setting for synchronous MCS-11 protocol
