Mercury 2+, User Manual

Page: 19 / 82

Mercury 2+ Operator Terminal User Manual Page 19 of 82 2019r0
After installing the Intrinsically Safe interface module, you can
proceed to connect power and communication wiring to the
Mercury Terminal.
For the cable entry into the Mercury Terminal, fit a suitable
insulated cable gland (M20) on the four core or twin twisted pair
cable.
The terminal connection blocks are protected by a cover, or the
card reader if fitted. Remove the cover by unscrewing the four
retaining screws.
Power and communication connections are made to terminal block
J5, pins 1 to 4. The cable screen is connected to pin 5.
The Mercury 2+ has a "Simple Equipment Interface" to both
Digital Inputs and Digital Outputs.
The Digital inputs on J2 are whetted and can supply 2.1mA to the
Simple Apparatus Switch. This could be a reed­relay or a
NAMUR style proximity Switch.
J2 Pins 1, 2, 3, 4, 5 & 6
Uo = 29.4 V Li = 0
Io = 66.4 mA Ci = 0
Po = 262 mW Lo/Ro = 135 μH / Ώ
Co = 71 nF
Li = 0
The connections J2 pins 2, 4 and 6 are at a logic 0V. Only volt free
contacts are permitted for use with these digital inputs.
The Digital Outputs on J1 are isolated, voltage­free open­
collectors.
J1 Pins 1, 2, 3 & 4
Uo = 29.4 V Li = 0
Po = 262 mW Ci = 0
Digital Inputs
Digital Outputs
Connectioning the
Mercury Terminal
Connecting to the
Terminal Blocks