Basler Electric DECS-250N - Manual (Page 339)

9440500990 Rev D 323
DECS-250N Analog Expansion Module
Connectors and headers may contain tin- or gold-plated conductors. Tin-plated conductors are housed in
a black plastic casing and gold-plated conductors are housed in an orange plastic casing. Mate
connectors to headers of the same color only.
Caution
By mating conductors of dissimilar metals, galvanic corrosion could
occur which deteriorates connections and leads to signal loss.
Connector screw terminals accept a maximum wire size of 12 AWG. Thermocouple connectors accept a
maximum thermocouple wire diameter of 0.177 inches (4.5 mm). Maximum screw torque is 5 in-lb
(0.56 N•m).
Operating Power
The Analog Expansion Module operating power input accepts either 12 Vdc or 24 Vdc and tolerates
voltage over the range of 6 to 32 Vdc. Operating power must be of the correct polarity. Although reverse
polarity will not cause damage, the AEM-2020 will not operate. Operating power terminals are listed in
Table 42.
It is recommended that a fuse be added for additional protection for the wiring to the battery input of the
Analog Expansion Module. A Bussmann ABC-7 fuse or equivalent is recommended.
Table 42. Operating Power Terminals
Terminal Description
P1- (SHIELD) Chassis ground connection
P1- – (BATT–) Negative side of operating power input
P1- + (BATT+) Positive side of operating power input
AEM-2020 Inputs and Outputs
Input and output terminals are shown in Figure 169 and listed in Table 43.