Foxconn Interfacility Link 7870 User Manual

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.

1

—

—

+14V Power

200 mA [max 

≥ 10°C]

1

2

—

—

Spare

Not Used

3

J11-P9, J12-P25
J13-P25

J4-P25

GND

Chassis Ground

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 laser optical power: 
range -4.2 to 4.8

6

J13-P17 to 
J13-P24

J4-P17 to J4-P24

LSRI

Indicates Laser Bias;
Range 

7

J12-P1 to J12-P8

J2: P1-P2

P3-P4, P5-P6

P7-P8, P9-P10

P11-P12, P13-

P14

P15-P16

RFA

RF Alarm: Open collector 
interface.

2

 Sinks current when 

RF level is low, up to 30 mA.

8

J12-P9  to 
J12-P16

See note below

OPTA

Optical Alarm: Open Collector 
Interface

. Sinks current at low 

optical, up to 30 mA.

9

J11-P1 to J11-P6

Spare

Not used

Table 4 7870T Transmitter Pinout
1.

300 ma below 10°C

2.

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