Honeywell HC900 User And Installation Manual page 102

Step Procedure Comments Reference
7 If installing a PFQ module, set its Input 1, Input 2 and Index DIP switches to differential or single
ended mode. Inputs mode need not match index mode. See below for switch positions.
Switch location on PFQ module:
Settings (using Input 1 as example)
Single ended (factory setting):
1 and 2 (SINGLE) = ON, 3 and 4 (DIFF) = OFF
Differential:
1 and 2 (SINGLE) = OFF, 3 and 4 (DIFF) = ON
88 HC900 Process & Safety Controller User and Installation Manual Revision 6
21 April 2017