OP8120 DB37 Pin Assignments

When mounted in the OP8120 chassis, each module’s channels correspond to a specific pair of pins of the P1 or P2 DB37 connectors at the rear of the chassis, and a pair of pins on the DB37 of the real-time simulator.

Each OP8120 module installed in one slot of the chassis represents a block of 4 analog channels on the simulator, even if the module has only 2 channels like the OP8121 module.

The simulator and OP8120 connectors pins assignments are given in the table below. For the purpose of this table, each slot, from left to right, is numbered from 1 to 8.

OP89120 Slot	Simulator DB37F pin numbers	OP8120 DB37F pin numbers
1	+CH00/-CH00	1/20
	+CH01/-CH01	2/21
	+CH02/-CH02	3/22
	+CH03/-CH03	4/23
2	+CH04/-CH04	5/24
	+CH05/-CH05	6/25
	+CH06/-CH06	7/26
	+CH07/-CH07	8/27
3	+CH08/-CH08	9/28
	+CH09/-CH09	10/29
	+CH10/-CH10	11/30
	+CH11/-CH11	12/31
4	+CH12/-CH12	13/32
	+CH13/-CH13	14/33
	+CH14/-CH14	15/34
	+CH15/-CH15	16/35
5	+CH16/-CH16	1/20
	+CH17/-CH17	2/21
	+CH18/-CH18	3/22
	+CH19/-CH19	4/23
6	+CH20/-CH20	5/24
	+CH21/-CH21	6/25
	+CH22/-CH22	7/26
	+CH23/-CH23	8/27
7	+CH24/-CH24	9/28
	+CH25/-CH25	10/29
	+CH26/-CH26	11/30
	+CH27/-CH27	12/31
8	+CH28/-CH28	13/32
	+CH29/-CH29	14/33
	+CH30/-CH30	15/34
	+CH31/-CH31	16/35