Campbell csi mAXON Manuel d'utilisateur télécharger pdf (Page 6)

06 QUICK START USER MANUAL ENVOY

2.4 ENVOY Uncovered

The cover slides onto the ENVOY body and is secured

with 2 small countersunk screws. Once the cover is

removed, the circuit boards can be accessed. Please

ensure that components are protected from damage

due to static discharge or water damage. The only

user-servicable part is the DIP switch selection.

2.4.1 ENVOY DIP Switches

Switch 1

Up – Connects the external screw terminal labelled

PLLEX to EX2 on the CR200X.

Down – Connects the external screw terminal

labelled PLLEX to PLL on the CR200X.

Switch 2

Up – Connects the external screw terminal labelled

SE2 to SE2 on the CR200X.

Down – Connects the external screw terminal

labelled SE2 to SE4 on the CR200X via a precision 100 Ohm resistor. This could be used to convert a 4-20mA sensor

output to 0.4–2.0 Volts, suitable for the CR200X’s single-ended voltage input (2500mV range).

Switch 3

Up – Connects the external screw terminal labelled SE1 to SE1 on the CR200X.

Down – Connects the external screw terminal labelled SE1 to SE3 on the CR200X via a precision 100 Ohm resistor.

This could be used to convert a 4-20mA sensor output to 0.4–2.0 Volts, suitable for the CR200X’s single-ended

voltage input (2500mV range).

Switch 4

Up – Forces the RS232 data lines from the CR200X to always connect to the DB9.

Down – Allows the RS232 data lines to switch to the modem when the DB9 port is not in use. The DB9 port is

considered in use when DTR (Pin 4 on the DB9) is high. When DTR is low or open (e.g. cable disconnected),

communication is automatically switched to the modem.

Down

1 2 3 4 5 6 7 8 9

Pas de commentaire

Campbell csi mAXON Manuel d'utilisateur Page 6