Foxconn manual 7870R Receiver Pinout

3.3 7870 Interfacility Link Pinouts

3.3.2Receiver Pinouts

Standalone	7180M Chassis	2380 Relay
9 Pin
Connector	Backplane	Adapter	Name	Description
[J14]	Connector	Connector
1	—	—	+14V Power	350 mA
2	—	—	Spare	Not Used
3	J11-P9	J4-P25	GND	Chassis Ground
	J12-P25
	J13-P25
4	J13-P1 to J13-P8	J4-P1 to J4-P8	RSSI	RF signal strength
				indicator:
				range 0.2 - 10 V
5	J13-P9 to J13-P16	J4-P9 to J4-P16	PDI	Indicates input optical
				power: 1 V/ 1 m optical
				power
6	—	—	Spare	Not used
7	J12-P1 to J12-P8	J2: P1-P2	RFA	RF Alarm: Open collector
		P3-P4, P5-P6		interface.1 Sinks current
		P7-P8, P9-P10		when RF level is low, up
		P11-P12		to 30 mA.
		P13-P14
		P15-P16
8	J12-P9 to J12-P16	See note below	OPTA	Optical Alarm: Open
				Collector Interface1..
				Sinks current at low
				optical, up to 30 mA.
9	—	—	Spare	Not used

Table 5 7870R Receiver Pinout

1.If the 2380 Relay Adapter is installed, the alarms are dry contact. See Appendix 3 The 2380 Relay Adapter on page 33.

Note If a 2380 Relay Adapter is installed RF and Optical Levels are measured together; the alarm indicates a problem in either the RF or optical levels.

Figure 16 7870R Receiver pinout

Caution When monitoring the voltage outputs use only a high resistance DVM.

7870 Interfacility Link Installation and User’s Guide	page 21
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