RFL 9300 RFL Electronics Inc.
October 20, 2004 5-12 (973) 334-3100
Table 5-1. Pin assignment for DC-37 connector on RFL 93 DD I/O Direct Digital I/O Module
Pin No.
Signal Name Description
1 SHLDGND Shell ground (chassis ground)
19 GND Signal ground
25 GND Signal ground
7 +5V +5-volt signal
4 SD A TX DATA output + (RS-422)
22 SD B TX DATA output -
5 ST A SEND TIMING input + (RS-422)
23 ST B SEND TIMING input -
6 RD A RX DATA input + (RS-422)
24 RD B RX DATA input -
8 RT A RECEIVE TIMING input + (RS-422)
26 RT B RECEIVE TIMING input -
33 /ALARM EXTERNAL ALARM input (logic - level). Pull-up to +5V to drive alarm; low to signal ground