Delta Tau PMAC2A-PC/104 Manuel D’Utilisation

If this socketed resistor is configured as a pull-up resistor (by reversing the SIP pack in the socket), the 
two parallel 2.2 k

Ω resistors act as a single 1.1 kΩ pull-up resistor, holding the line at +5V in the absence 

of an external signal.  This configuration is required if complementary open-collector drivers are used; it 
is permissible for differential line-driver inputs. 

If Pin 1 of the resistor pack, marked by a dot on the pack, matches Pin 1 of the socket, labeled by a white 
square, then the pack is configured as a bank of pull-down resistors.  If the pack is reversed in the socket, 
it is configured as a bank of pull-up resistors. 

The following table lists the pull-up/pull-down resistor pack for each input device: 

Encoder 1 

RP30 

6-pin 

Encoder 2 

RP31 

6-pin 

Encoder 3 

RP36 

6-pin 

Encoder 4 

RP37 

6-pin